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Kentbrooksite

A valid IMA mineral species

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Photos of Kentbrooksite (27)Discuss Kentbrooksite

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Edit Kentbrooksite Add Synonym Edit CIF structures Clear Cache

Kentbrooksite

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada

Kentbrooksite, etc.

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada

Kentbrooksite

Lovchorrite Mine, Hackman Valley, Yukspor Mountain, Murmansk Oblast, Russia

Kentbrooksite

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada

Kentbrooksite, etc.

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada

Kentbrooksite

Lovchorrite Mine, Hackman Valley, Yukspor Mountain, Murmansk Oblast, Russia

Kentbrooksite

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada

Kentbrooksite, etc.

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada

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About KentbrooksiteHide

C. Kent Brooks

Formula:

(Na,REE)₁₅(Ca,REE)₆(Mn²⁺,Fe²⁺)₃Zr₃Nb[Si₂₅O₇₄]F₂ · 2H₂O

Colour:

Yellow-brown

Lustre:

Vitreous

Hardness:

5 - 6

Specific Gravity:

3.10

Crystal System:

Trigonal

Member of:

Eudialyte Group

Name:

Named by O. Johnsen, J.D. Grice, and R.A. Gault in 1998 in honor of Charles Kent Brooks (1943-), professor at the Geological Institute, University of Copenhagen. He was the leader of fourteen geological expeditions to the Kangerdlugssuaq area of east Greenland and collected the type specimen.

Type Locality:

ⓘ Kentbrooksite occurrence, Amdrup Firth, Kangerlussuaq Fjord, Sermersooq, Greenland

Eudialyte Group. "Nb-REE-Mn-F" end member (Johnsen et al., 1998), but REE does not dominate at any structural site. Difference from eudialyte sensu stricto is mainly in (1) dominance of ^VMn at the M2 site, (2) ^VINb presence at the M3 site, (3) dominance of F, (4) high amount of REE.

Element combination of kentbrooksite is unique among approved mineral species.

Unique IdentifiersHide

Mindat ID:

7132

Long-form identifier:

mindat:1:1:7132:7

IMA Classification of KentbrooksiteHide

IMA status:

Approved

IMA Formula:

(Na,REE)₁₅(Ca,REE)₆Mn²⁺₃Zr⁴⁺₃Nb⁵⁺(Si₂₅O₇₃)(O,OH,H₂O)₃(F,Cl)₂

Approval year:

1996

First published:

1998

Type description reference:

Johnsen, Ole, Grice, Joel D., Gault, Robert A. (1998) Kentbrooksite from the Kangerdlugssuaq intrusion, East Greenland, a new Mn-REE-Nb-F end-member in a series within the eudialyte group: Description and crystal structure. European Journal of Mineralogy, 10 (2) 207-220 doi:10.1127/ejm/10/2/0207

Classification of KentbrooksiteHide

Strunz-mindat (2026):

9.CO.10

9 : SILICATES (Germanates)
C : Cyclosilicates
O : [Si₉O₂₇]₁₈- 9-membered rings

Dana 7th ed.:

64.1.1.3

Dana 8th ed.:

64.1.2.1

64 : CYCLOSILICATES Rings with Other Anions and Insular Silicate Groups
1 : Rings with Other Anions and Insular Silicate Groups with mixed ring types

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

Symbol	Source	Reference for Standard
Ktb	IMA–CNMNC	Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
Ktb	The Canadian Mineralogist (2019)	The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download

Pronunciation of KentbrooksiteHide

Pronunciation:

Play	Recorded by	Country
	Jolyon Ralph	United Kingdom

Physical Properties of KentbrooksiteHide

Lustre:

Vitreous

Transparency:

Transparent

Colour:

Yellow-brown

Streak:

White

Hardness:

5 - 6 on Mohs scale

Tenacity:

Brittle

Cleavage:

None Observed
No distinct cleavage reported.

Fracture:

Irregular/Uneven

Density:

3.10 g/cm³ (Measured) 3.08 g/cm³ (Calculated)

Optical Data of KentbrooksiteHide

Type:

Uniaxial (-)

RI values:

n_ω = 1.628 n_ε = 1.623

Max. Birefringence:

δ = 0.005
Based on recorded range of RI values above.

Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.

Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.

Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.

Thickness: 30 µm Order divisions

Rotation:

Surface Relief:

High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).

This shows the grain boundary and Becke line effect under plane-polarised light, based on the contrast between this mineral's average refractive index and the mounting medium. It does not take into account mineral colouration.

Focus:

In focus

Interference Figure:

This shows the idealized uniaxial interference figure - the conoscopic (convergent-light, Bertrand-lens-in) view, for a grain cut with the optic axis centred and vertical. The coloured rings are isochromatics, computed with the same physics as the Michel-Lévy bar above; the dark cross is the isogyre.

For a genuinely uniaxial mineral viewed this way, that cross stays perfectly stationary if you rotate the stage - unlike a biaxial mineral, where it splits apart on rotation. That invariance is itself the standard diagnostic test for telling uniaxial and biaxial minerals apart at the microscope.

Thickness: 30 µm

Pleochroism:

Non-pleochroic

Chemistry of KentbrooksiteHide

Mindat Formula:

(Na,REE)₁₅(Ca,REE)₆(Mn²⁺,Fe²⁺)₃Zr₃Nb[Si₂₅O₇₄]F₂ · 2H₂O

Element Weights:

Element	% weight
O	39.520 %
Si	22.820 %
Na	11.208 %
Zr	8.895 %
Ca	7.816 %
Mn	5.357 %
Nb	3.020 %
F	1.235 %
H	0.131 %

Calculated from ideal end-member formula.

Elements listed:

Ca, F, Fe, H, Mn, Na, Nb, O, Si, Zr - search for minerals with similar chemistry

Common Impurities:

REE,Y,K,Sr,Fe,Al,Ti,(Hf,Mg)

Crystallography of KentbrooksiteHide

Crystal System:

Trigonal

Class (H-M):

3m - Ditrigonal Pyramidal

Space Group:

R3m

Setting:

R3m

Cell Parameters:

a = 14.1686(2) Å, c = 30.0847(4) Å

Ratio:

a:c = 1 : 2.123

Unit Cell V:

5,230.34 Å³ (Calculated from Unit Cell)

Crystal StructureHide

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Unit Cell | Unit Cell Packed
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure

ID	Species	Reference	Year	Locality	Temp (K)
0012363	Kentbrooksite	Rastsvetaeva R K, Khomyakov A P, Nekrasov Y V (1999) Crystal structure of a novel analog of eudialyte with R3 symmetry Crystallography Reports 44 765-769	1999	Alluaiv mountain, Lovozero massif, Kola Peninsula, Russia	293
0005623	Kentbrooksite	Johnsen O, Grice J D (1999) The crystal chemistry of the eudialyte group The Canadian Mineralogist 37 865-891	1999	Locality: Burpala massif, Siberia, Russia	293
0005622	Kentbrooksite	Johnsen O, Grice J D (1999) The crystal chemistry of the eudialyte group The Canadian Mineralogist 37 865-891	1999	Mont Saint-Hilaire, Rouville County, Quebec, Canada	293
0005619	Kentbrooksite	Johnsen O, Grice J D (1999) The crystal chemistry of the eudialyte group The Canadian Mineralogist 37 865-891	1999	Amdrup Fjord, Kangerdlugssuaq intrusion, Eastern Greenland	293
0005610	Kentbrooksite	Johnsen O, Grice J D (1999) The crystal chemistry of the eudialyte group The Canadian Mineralogist 37 865-891	1999	Mont Saint-Hilaire, Rouville County, Quebec, Canada	293
0005609	Kentbrooksite	Johnsen O, Grice J D (1999) The crystal chemistry of the eudialyte group The Canadian Mineralogist 37 865-891	1999	Mont Saint-Hilaire, Rouville County, Quebec, Canada	293
0006713	Kentbrooksite	Johnsen O, Grice J D, Gault R A (1998) Kentbrooksite from the Kangerdlugssuaq intrusion, East Greenland, a new Mn-REE-Nb-F end-member in a series within the eudialyte group: Description and crystal structure European Journal of Mineralogy 10 207-219	1998	Kangerdlugssuaq intrusion, East Greenland	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Kentbrooksite'
loop_
_publ_author_name
'Rastsvetaeva R K'
'Khomyakov A P'
'Nekrasov Y V'
_journal_name_full 'Crystallography Reports'
_journal_volume 44 
_journal_year 1999
_journal_page_first 765
_journal_page_last 769
_publ_section_title
;
 Crystal structure of a novel analog of eudialyte with R3 symmetry
;
_database_code_amcsd 0012363
_chemical_compound_source 'Alluaiv mountain, Lovozero massif, Kola Peninsula, Russia'
_chemical_formula_sum 'Na16.002 Ca2.1 Ce.579 La.342 Nd.228 Mn3.6 Fe.15 Zr3.3 Hf.051 Nb.4 Sr.45 K.099 Ti.099 Si25.6 O77.11 F.5 Cl.3 H6.86'
_cell_length_a 14.182
_cell_length_b 14.182
_cell_length_c 30.37
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 5289.936
_exptl_crystal_density_diffrn      3.009
_symmetry_space_group_name_H-M 'R 3'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '2/3+x,1/3+y,1/3+z'
  '1/3+x,2/3+y,2/3+z'
  '-y,x-y,z'
  '2/3-y,1/3+x-y,1/3+z'
  '1/3-y,2/3+x-y,2/3+z'
  '-x+y,-x,z'
  '2/3-x+y,1/3-x,1/3+z'
  '1/3-x+y,2/3-x,2/3+z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_U_iso_or_equiv
Na1a   0.19000   0.61500   0.15270   0.50000   0.09879
Na1b   0.18200   0.56900   0.15500   0.50000   0.07346
Ca1   0.24480   0.24470   0.00010   0.70000   0.02242
Ce1   0.24480   0.24470   0.00010   0.15000   0.02242
La1   0.24480   0.24470   0.00010   0.09000   0.02242
Nd1   0.24480   0.24470   0.00010   0.06000   0.02242
Mn  -0.00060   0.27180   0.00010   1.00000   0.02305
MnM2   0.18330   0.35510   0.33140   0.20000   0.02305
FeM2   0.18330   0.35510   0.33140   0.05000   0.02305
Zr2   0.03790   0.52590   0.00290   0.13300   0.03040
Hf2   0.03790   0.52590   0.00290   0.01700   0.03040
Nb   0.33333   0.66667   0.29040   0.40000   0.02799
Na2a   0.11750   0.22340   0.15340   0.39700   0.04433
Ce2a   0.11750   0.22340   0.15340   0.04300   0.04433
La2a   0.11750   0.22340   0.15340   0.02400   0.04433
Nd2a   0.11750   0.22340   0.15340   0.01600   0.04433
Na2b   0.07700   0.16200   0.17000   0.52000   0.09119
Sr   0.23960   0.11260   0.27760   0.10000   0.04939
Na3   0.19660   0.09500   0.28900   0.90000   0.03673
Na4   0.44600   0.55000   0.00360   0.60000   0.07852
Na5a   0.43880   0.21420   0.05340   0.50000   0.03673
Na5b   0.47600   0.23550   0.04230   0.45000   0.03293
Sr5b   0.47600   0.23550   0.04230   0.05000   0.03293
Na6   0.56120   0.11170   0.18040   0.96700   0.04686
K6   0.56120   0.11170   0.18040   0.03300   0.04686
Zr1   0.33350   0.15890   0.16660   0.96700   0.02343
Ti1   0.33350   0.15890   0.16660   0.03300   0.02343
SiT1a   0.33333   0.66667   0.04440   0.51000   0.01013
SiT1b   0.33333   0.66667   0.09020   0.49000   0.02786
SiT2   0.33333   0.66667   0.24920   0.60000   0.06839
Si1  -0.01070   0.60760   0.09750   1.00000   0.01976
Si1*  -0.00650   0.39530   0.09660   1.00000   0.01925
Si2   0.13970   0.05880   0.08090   1.00000   0.02204
Si3   0.06120   0.32720   0.23720   1.00000   0.01849
Si3*   0.27530   0.32250   0.23660   1.00000   0.01798
Si4   0.20830   0.41560   0.07670   1.00000   0.02305
Si5   0.52570   0.25180   0.25320   1.00000   0.02153
Si6   0.45740   0.54050   0.25740   1.00000   0.02254
O1   0.17630   0.35970   0.03020   1.00000   0.02913
O2   0.18280   0.35330   0.22100   1.00000   0.02913
O3   0.62610   0.59090   0.04550   1.00000   0.04053
O3*   0.64030   0.04010   0.04610   1.00000   0.02786
O4   0.25550   0.02310   0.20550   1.00000   0.03293
O4*   0.25940   0.22560   0.20600   1.00000   0.04179
O5   0.47520   0.22800   0.20420   1.00000   0.05446
O6   0.22450   0.09640   0.04230   1.00000   0.04053
O7   0.19350   0.08630   0.12930   1.00000   0.03546
O8   0.10720   0.39090   0.10790   1.00000   0.04433
O8*   0.27210   0.37060   0.10850   1.00000   0.02660
O9   0.44120   0.20440   0.29240   1.00000   0.03546
O10   0.61470   0.21260   0.25620   1.00000   0.03800
O11   0.07090   0.12370   0.07710   1.00000   0.04053
O12   0.05540   0.43700   0.22730   1.00000   0.03926
O12*   0.39100   0.42840   0.22690   1.00000   0.02660
O13   0.02920   0.51110   0.30490   1.00000   0.02913
O14   0.40750   0.29810   0.12890   1.00000   0.04053
O14*   0.41200   0.10290   0.12850   1.00000   0.03166
O15   0.04410   0.29910   0.28830   1.00000   0.02913
O15*   0.26420   0.29240   0.28850   1.00000   0.02406
O16   0.02000   0.51700   0.11190   1.00000   0.02913
O17   0.28330   0.54740   0.07080   1.00000   0.07472
O18a   0.20500   0.60700   0.24710   0.45000   0.05066
O18b   0.37700   0.59300   0.26220   0.55000   0.04306
O-H1   0.00000   0.00000   0.33000   0.51000   0.05446
O-H2   0.33333   0.66667   0.14400   0.55000   0.03546
O-H3   0.33333   0.66667   0.19600   0.53000   0.09752
O-H4   0.60500   0.40000  -0.00580   0.44000   0.05573
O-H5   0.41100   0.60600   0.00200   0.15000   0.07599
F   0.66667   0.33333   0.04240   0.50000   0.03420
Cl   0.66667   0.33333   0.04240   0.30000   0.03420
Wat3a   0.66667   0.33333   0.11000   0.58000   0.07726
Wat3b   0.66667   0.33333   0.15000   0.42000   0.10005
Wat1a   0.00000   0.00000   0.24800   0.43000   0.10385
Wat1b   0.00000   0.00000   0.28900   0.32000   0.04939

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
2.839 Å	(100)
2.961 Å	(91)
11.385 Å	(43)
7.088 Å	(41)
3.380 Å	(37)
4.295 Å	(34)
5.682 Å	(30)

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
Stage 4b: Highly evolved igneous rocks	>3.0
35 : Ultra-alkali and agpaitic igneous rocks

Type Occurrence of KentbrooksiteHide

Type Locality:

ⓘ Kentbrooksite occurrence, Amdrup Firth, Kangerlussuaq Fjord, Sermersooq, Greenland

General Appearance of Type Material:

anhedral to subhedral aggregates

Reference:

Synonyms of KentbrooksiteHide

IMA1996-023

Other Language Names for KentbrooksiteHide

Dutch:Kentbrooksiet

German:Kentbrooksit

Russian:Кентбруксит

Spanish:Kentbrooksita

Relationship of Kentbrooksite to other SpeciesHide

Member of:

Eudialyte Group

Other Members of Eudialyte Group:

Alluaivite	Na₁₉(Ca,Mn)₆(Ti,Nb)₃Si₂₆O₇₄Cl · 2H₂O	Trig. 3m(32/m) : R3m
Amableite-(Ce)	Na₁₅[(Ce_1.5Na_1.5)Mn₃]Mn₂Zr₃◻Si[Si₂₄O₆₉(OH)₃](OH)₂ · H₂O	Trig. 3 : R3
Andrianovite	Na₁₂(K,Sr,Ce)₃Ca₆Mn₃Zr₃Nb(Si₂₅O₇₃)(O,H₂O,OH)₅	Trig. 3m : R3m
Aqualite	(H₃O)₈(Na,K,Sr)₅Ca₆Zr₃Si₂₆O₆₆(OH)₉Cl	Trig. 3 : R3
Carbokentbrooksite	(Na₃Na₃Na₃Na₃Na₃)Ca₆(^VMn²⁺₃)Zr₃[Si₃O₉]₂[Si₉O₂₇SiO][Si₉O₂₇Nb(OH)₃](CO₃)(H₂O)	Trig. 3m : R3m
Davinciite	Na₁₂K₃Ca₆Fe²⁺₃Zr₃(Si₂₆O₇₃OH)Cl₂	Trig. 3m : R3m
Dualite	Na₃₀(Ca,Na,Ce,Sr)₁₂(Na,Mn,Fe,Ti)₆Zr₃Ti₃Mn[Si₅₁O₁₄₄](OH,H₂O,Cl)₉	Trig. 3m : R3m
Eudialyte	Na₁₅Ca₆Fe₃Zr₃Si(Si₂₅O₇₃)(O,OH,H₂O)₃(Cl,OH)₂	Trig. 3m(32/m) : R3m
Feklichevite	Na₁₁Ca₉(Fe³⁺,Fe²⁺)₂Zr₃Nb[Si₂₅O₇₃](OH,H₂O,Cl,O)₅	Trig. 3m : R3m
Fengchengite	Na₁₂◻₃(Ca,Sr)₆Fe³⁺₃ Zr₃Si(Si₂₅O₇₃)(H₂O,OH)₃(OH,Cl)₂	Trig. 3m(32/m) : R3m
Ferrokentbrooksite	Na₁₅Ca₆(Fe,Mn)₃Zr₃NbSi₂₅O₇₃(O,OH,H₂O)₃Cl₂	Trig. 3m : R3m
Georgbarsanovite	Na₁₂(Mn,Sr,REE)₃Ca₆Fe²⁺₃Zr₃NbSi₂₅O₇₆Cl₂ · H₂O	Trig. 3m : R3m
Golyshevite	Na₁₀Ca₃Ca₆Zr₃Fe₂SiNb(Si₃O₉)₂(Si₉O₂₇)₂CO₃(OH)₃ · H₂O	Trig. 3m : R3m
'Hydrorastsvetaevite'	(Na₁₁(H₃O)₁₁K₆(H₂O)_1.5Sr)Ca₁₂Fe₃Na₂MnZr₆Si₅₂O₁₄₄(OH)_4.5Cl_3.5	Trig. 3m : R3m
Ikranite	(Na,H₃O)₁₅(Ca,Mn²⁺)₆Fe³⁺₂Zr₃[H_0-3Si₃O₉)₂(Si₉O₂₇)₂SiO]Cl · 2-3H₂O	Trig. 3m : R3m
Ilyukhinite	(H₃O,Na)₁₄Ca₆Mn₂Zr₃Si₂₆O₇₂(OH)₂ · 3H₂O	Trig. 3m : R3m
Johnsenite-(Ce)	Na₁₂(Ce₂Ca)Ca₆Mn₃Zr₃[Si₃O₉]₂[Si₉O₂₇SiO][Si₉O₂₇W(O)₃](CO₃)(OH,Cl)₂	Trig. 3m : R3m
Khomyakovite	Na₁₂Sr₃Ca₆Fe₃Zr₃W[Si₂₅O₇₃](O,OH,H₂O)₃(OH,Cl)₂	Trig. 3m : R3m
Labyrinthite	(Na,K,Sr)₃₅Ca₁₂Fe₃Zr₆TiSi₅₁O₁₄₄(O,OH,H₂O)₉Cl₃	Trig. 3 : R3
Manganoeudialyte	Na₁₄Ca₆Mn₃Zr₃[Si₂₆O₇₂(OH)₂](H₂O,Cl,O,OH)₆	Trig. 3m : R3m
Manganokhomyakovite	Na₁₂Sr₃Ca₆Mn₃Zr₃W[Si₂₅O₇₃](O,OH,H₂O)₃(OH,Cl)₂	Trig. 3m : R3m
Mogovidite	Na₉(Ca,Na)₁₂Fe₂Zr₃Si₂₅O₇₂(CO₃) (OH)₄	Trig. 3m : R3m
Odikhinchaite	Na₉Sr₃[(H₂O)₂Na]Ca₆Mn₃Zr₃NbSi (Si₂₄O₇₂)O(OH)₃(CO₃) · H₂O	Trig. 3m : R3m
Oneillite	Na₁₅Ca₃Mn₃Fe²⁺₃Zr₃Nb(Si₂₅O₇₃)(O,OH,H₂O)₃(OH,Cl)₂	Trig. 3 : R3
Raslakite	Na₁₅Ca₃Fe²⁺₃(Na,Zr)₃Zr₃(Si,Nb)[(Si₃O₉)₂(Si₉O₂₇)₂SiO](OH,H₂O)₃(Cl,OH)	Trig. 3 : R3
Rastsvetaevite	Na₂₇K₈Ca₁₂Fe₃Zr₆Si₅₂O₁₄₄(O,OH,H₂O)₆Cl₂	Trig. 3m : R3m
Selsurtite	(H₃O)₁₂Na₃(Ca₃Mn₃)(Na₂Fe)Zr₃◻{Si(Si₃O₉)₂(Si₉O₂₇)Si₉O₂₄(OH)₃}(OH)Cl(H₂O)	Trig. 3 : R3
Sergevanite	Na₁₅(Ca₃Mn₃)(Na₂Fe)Zr₃Si₂₆O₇₂(OH)₃ · H₂O	Trig. 3 : R3
Siudaite	Na₈(Mn²⁺₂Na)Ca₆(Fe³⁺,Mn²⁺)₃Zr₃NbSi₂₄(Si,◻,Ti)O₇₄(OH)₂Cl · 5H₂O	Trig. 3m : R3m
Taseqite	Na₁₂Sr₃Ca₆Fe₃Zr₃Nb[(Si₃O₉)₂(Si₉O₂₇)₂SiO]Cl₂(O,OH,H₂O)₃	Trig. 3m : R3m
'UM1971-22-SiO:CaClFeHMgMnNaNbZr'	Na₁₂Ca₅(Ce,La,Y,Ca)Zr₃(Zr,Nb)(Fe,Mn)₃[Si₉O_24-26(OH)_1-3]₂[Si₃O₉]₂Cl	Trig. 3m : R3m
'UM1990-78-SiO:CaClFeHKNaZr'	(H₃O)₇(Na,K)₅(Ca,Sr,Mn)₆Zr₃[Si₃O₇(O,OH)₂]₂[Si₉O₂₃(O,OH)₄]2[SiNaFe(Zr,Ti,Al,Nb)◻]Cl_1.5(O,OH)	Trig. 3m : R3m
'UM1990-79-SiO:CaClFeHMnNaNbREEZr'	Na₁₄Ca₅(Mg,Ca,Mn)Zr₃(Si₃O₉)₂(Si₉O₂₇)₂(Si,Nb,Al,Zr)₂(Fe,Zr)₃(Mn,Na,Ce,La,Y)(Na,H₂O,K,Sr)(OH)_4-5(OH,Cl)
'UM1990-80-SiO:CaFeHMnNaNbREEZr'	Na₁₄Ca₄(Mn,Ca)₂Zr₃(Si₃O₉)₂(Si₉O₂₇)₂(Si,Nb,Al,Zr)₂(Fe,Mn,Al,Ti)₃(Na,Ce,La,Y,Mn)(Na,H₂O,K,Sr)(OH)_7-8
'UM1998-21-SiO:CaCeClHMnNaZr'	Na₁₆Ca₆(Mn,Ce)₃Zr₃(Si₃O₉)₂(Si₉O₂₇)₂(OH,Cl)₄ · nH₂O	Trig. 3m : R3m
'UM1999-36-SiO:CaCeHMnNaNbSrZr'	Na₁₇(Ca,Ce,Sr)₂Mn₃(Zr,Nb)₄Si₂₅O₇₃(O,OH,F,Cl)₅	Trig. 3 : R3
'UM2000-66-SiO:CaClFeHMnNaNbSrZr'	Na₁₂(Ca,Mn)₆(Sr,Na,K)₃(Fe,Mn)₃(Zr,Nb)₄Si₂₅O₆₆(OH,Cl)₁₁	Trig. 3m : R3m
'UM2000-67-SiO:CaClFeHMnNaNbZr'	Zr4(Ca,Na,Mn,Fe)6(Fe,Mn,Ti)3Na17Si25O75(Al,Nb,Ti)Cl(OH)4.H2O	Trig. 3m : R3m
'UM2000-80- SiO:CaCeFFeHMnNaNbTiZr'	Na₁₄(Na,Ca,Ce)(Mn,Ca,Ce)[Fe_1.55(Zr,Na)(◻,Ti,Nb)]Zr₃(Si,Al)(Si₃O₉)₂(Si₉O₂₇)₂(OH,O)₄(F ,Cl) · H₂O
'UM2003-39-SiO:CaClFeHHfNaNbSrTaTiZr'	Na₁₂(Na,K,Mn,Sr)₂Ca₅(Ca,Mn)(Zr,Hf)₃(Fe,◻,Ta)₃(Si,Nb,W)(Si,Al,Ti)Si₂₄O₇₂(OH,O)_3.5Cl · 1.2H₂O	Trig. 3m : R3m
'UM2004-51-SiO:CaClFFeHNaNbTi'	Na₁₆Ca₆(Fe,Mn)₃Zr₃(Ti,Nb)Si₂₆O₇₂FCl_0.5 · nH₂O	Trig. 3m : R3m
'UM2005-36-SiO:AlBaCaClFeHKMnNaREESrTiZr'	[(H₃O)_9.32Na_5.86K_0.53Ba_0.36Sr_0.15][Ca_5.22Sr_0.49Ce_0.16Mn_0.13][Zr_2.42Ti_0.54Hf_0.02Nb_0.02][Na_1.48(Fe
'UM2005-37-SiO:AlBaCaClFeHKMnNaREESrTiZr'	[(H₃O)_9.26Na_2.12K_1.20Ba_0.46Sr_0.48][Ca_5.76Ce_0.24][Zr2_.92Ti_0.08][Na_0.62(Fe_0.23Mn_0.11(H₂O)_0.34)][Si
'UM2005-38-SiO:AlBaCaClFeHKMnNaNbREESrTiYZr'	[(H₃O)_10.85Na_3.3Sr_0.48K_0.21Ce_0.2Y_0.1Ba_0.04][Ca_2.10Na_0.9][Ca_2.4Na_0.3Mn_0.3][Zr_2.97Hf_0.03][Fe_1.32
'UM2005-39-SiO:AlBaCaClFeHKMnNaNbREESrTiYZr'	[(H₃O)_11.61Na_3.0Sr_0.63Ce_0.22K_0.2Y_0.05Ba_0.03][Ca_2.25Na_0.75][Ca_2.4Mn0_.6][Zr_2.98Hf_0.02][Fe³⁺_0.66
'UM2005-40-SiO:AlCaClFeHKMnNaNbREESrTiYZr'	[(H₃O)_5.58Na5_.25Ce_0.63K_0.3Y_0.19Sr_0.05][Ca₃][Ca_1.71Mn_1.29][Zr_2.96Hf_0.04][(Fe³⁺_1.0Fe²⁺_0.35)(Fe³⁺
'UM2005-41-SiO:BaCaFeHKMgMnNaNbREESrTiYZr'	[(H₃O)_8.53Na_3.51Sr_0.55Ce_0.45Y_0.3Ba_0.15K_0.06][Ca_2.25Sr_0.45Na_0.3][Ca_2.4Mn_0.6][Zr_2.97Hf_0.03][(Mn_0.
'UM2006-17-SiO:CaClFFeHMnNaZr'	Na₁₅(Ca₃Mn₃)Zr₃(Fe,Zr)₃SiSi(Si₃O₉)₂(Si₉O₂₇)₂O₂(OH,F,Cl)₃ · 2H₂O
'UM2006-18-SiO:CaClFFeHMnNaZr'	Na₁₅Ca₃(Mn,Fe)₃Zr₃(Zr,Na)₃(Si,Nb)(S,Ti,Si)(Si₃O₉)₂(Si₉O₂₇)₂(O,OH)₅(Cl,F,H₂O)	Trig. 3 : R3
'UM2006-28-SiO:CaHMnNaZr'	Na₃₃Ca₁₂Zr₆Mn₃(Mn,Nb,Ti)₂Si₅₀O₁₃₂(O,OH)₁₂(OH,H₂O,Cl)₁₀
'UM2010-06-SiO:CaFeHMnNaNbREETiZr'	[Na,(H₃O)]₁₅(Ca₃Mn₃)Na₃Zr₃(Si,Ti)[Si₂₅O₇₂OH](OH)₂ · 2H₂O
'Unnamed (Hydrated Hydrous Na-Ca-Mn-Fe-Zr-Ti Silicate Chloride)'	Na₃₇Ca₁₀Mn₂FeZr₆Si₅₀(Ti,Nb)₂O₁₄₄(OH)₅Cl₃ · H₂O	Trig. 3m : R3m
'Unnamed (Hypermanganese Eudialyte)'	Na₂₉Ca₁₂Zr₆[Si₄₈O₁₃₂(O,OH)₁₂]{[Na]₄[Si]₂}{[Mn]₃[Mn,Nb,Ti]₂}(OH,H₂O,Cl)₁₀	Trig. 3m(32/m) : R3m
'Unnamed (M4-vacant Sodium Calcium Manganese Zirconium Iron Silicon Hydroxyl Hydrated Eudialyte Group Species)'	Na₁₃(Ca₃Mn₃)Zr₃(Fe, Mn)₃(◻)(Si)[Si₃O₉]₂[Si₉O₂₇]₂(O,OH,Cl)₃ · 2H₂O
Voronkovite	Na₁₅(Na,Ca,Ce)₃(Mn,Ca)₃Fe₃Zr₃Si₂₆O₇₂(OH,O)₄Cl · H₂O	Trig. 3 : R3
Zirsilite-(Ce)	Na_11-12(Ce,Na)₃Ca₆Mn₃Zr₃Nb(Si₁₉O₅₅)(Si₃O₉)₂(CO₃)(OH)₃ · H₂O	Trig. 3m : R3m

Common AssociatesHide

Associations Based on Photo Data:

18 photos of Kentbrooksite associated with Aegirine	NaFe³⁺Si₂O₆
10 photos of Kentbrooksite associated with Nepheline	Na₃K(Al₄Si₄O₁₆)
8 photos of Kentbrooksite associated with Parakeldyshite	Na₂ZrSi₂O₇
5 photos of Kentbrooksite associated with Fluorapatite	Ca₅(PO₄)₃F
4 photos of Kentbrooksite associated with Analcime	Na(AlSi₂O₆) · H₂O
4 photos of Kentbrooksite associated with Albite	Na(AlSi₃O₈)
4 photos of Kentbrooksite associated with Sodalite	Na₄(Si₃Al₃)O₁₂Cl
3 photos of Kentbrooksite associated with Feldspar Group
3 photos of Kentbrooksite associated with Pyatenkoite-(Y)	Na₅YTi[SiO₃]₆ · 6H₂O
3 photos of Kentbrooksite associated with Tsepinite-Ca	(Ca,K,Na)_2-x(Ti,Nb)₂(Si₄O₁₂)(OH,O)₂ · 4H₂O

Related Minerals - Strunz-mindat Grouping Hide

9.CO.	Odikhinchaite	Na₉Sr₃[(H₂O)₂Na]Ca₆Mn₃Zr₃NbSi (Si₂₄O₇₂)O(OH)₃(CO₃) · H₂O	Trig. 3m : R3m
9.CO.10	Manganokhomyakovite	Na₁₂Sr₃Ca₆Mn₃Zr₃W[Si₂₅O₇₃](O,OH,H₂O)₃(OH,Cl)₂	Trig. 3m : R3m
9.CO.10	Sergevanite	Na₁₅(Ca₃Mn₃)(Na₂Fe)Zr₃Si₂₆O₇₂(OH)₃ · H₂O	Trig. 3 : R3
9.CO.10	Feklichevite	Na₁₁Ca₉(Fe³⁺,Fe²⁺)₂Zr₃Nb[Si₂₅O₇₃](OH,H₂O,Cl,O)₅	Trig. 3m : R3m
9.CO.10	'UM1990-78-SiO:CaClFeHKNaZr'	(H₃O)₇(Na,K)₅(Ca,Sr,Mn)₆Zr₃[Si₃O₇(O,OH)₂]₂[Si₉O₂₃(O,OH)₄]2[SiNaFe(Zr,Ti,Al,Nb)◻]Cl_1.5(O,OH)	Trig. 3m : R3m
9.CO.10	Golyshevite	Na₁₀Ca₃Ca₆Zr₃Fe₂SiNb(Si₃O₉)₂(Si₉O₂₇)₂CO₃(OH)₃ · H₂O	Trig. 3m : R3m
9.CO.10	Labyrinthite	(Na,K,Sr)₃₅Ca₁₂Fe₃Zr₆TiSi₅₁O₁₄₄(O,OH,H₂O)₉Cl₃	Trig. 3 : R3
9.CO.10	'UM1990-79-SiO:CaClFeHMnNaNbREEZr'	Na₁₄Ca₅(Mg,Ca,Mn)Zr₃(Si₃O₉)₂(Si₉O₂₇)₂(Si,Nb,Al,Zr)₂(Fe,Zr)₃(Mn,Na,Ce,La,Y)(Na,H₂O,K,Sr)(OH)_4-5(OH,Cl)
9.CO.10	Ilyukhinite	(H₃O,Na)₁₄Ca₆Mn₂Zr₃Si₂₆O₇₂(OH)₂ · 3H₂O	Trig. 3m : R3m
9.CO.10	Oneillite	Na₁₅Ca₃Mn₃Fe²⁺₃Zr₃Nb(Si₂₅O₇₃)(O,OH,H₂O)₃(OH,Cl)₂	Trig. 3 : R3
9.CO.10	'UM1971-22-SiO:CaClFeHMgMnNaNbZr'	Na₁₂Ca₅(Ce,La,Y,Ca)Zr₃(Zr,Nb)(Fe,Mn)₃[Si₉O_24-26(OH)_1-3]₂[Si₃O₉]₂Cl	Trig. 3m : R3m
9.CO.10	'UM1998-21-SiO:CaCeClHMnNaZr'	Na₁₆Ca₆(Mn,Ce)₃Zr₃(Si₃O₉)₂(Si₉O₂₇)₂(OH,Cl)₄ · nH₂O	Trig. 3m : R3m
9.CO.10	Selsurtite	(H₃O)₁₂Na₃(Ca₃Mn₃)(Na₂Fe)Zr₃◻{Si(Si₃O₉)₂(Si₉O₂₇)Si₉O₂₄(OH)₃}(OH)Cl(H₂O)	Trig. 3 : R3
9.CO.10	Davinciite	Na₁₂K₃Ca₆Fe²⁺₃Zr₃(Si₂₆O₇₃OH)Cl₂	Trig. 3m : R3m
9.CO.10	Carbokentbrooksite	(Na₃Na₃Na₃Na₃Na₃)Ca₆(^VMn²⁺₃)Zr₃[Si₃O₉]₂[Si₉O₂₇SiO][Si₉O₂₇Nb(OH)₃](CO₃)(H₂O)	Trig. 3m : R3m
9.CO.10	Zirsilite-(Ce)	Na_11-12(Ce,Na)₃Ca₆Mn₃Zr₃Nb(Si₁₉O₅₅)(Si₃O₉)₂(CO₃)(OH)₃ · H₂O	Trig. 3m : R3m
9.CO.10	Taseqite	Na₁₂Sr₃Ca₆Fe₃Zr₃Nb[(Si₃O₉)₂(Si₉O₂₇)₂SiO]Cl₂(O,OH,H₂O)₃	Trig. 3m : R3m
9.CO.10	Ikranite	(Na,H₃O)₁₅(Ca,Mn²⁺)₆Fe³⁺₂Zr₃[H_0-3Si₃O₉)₂(Si₉O₂₇)₂SiO]Cl · 2-3H₂O	Trig. 3m : R3m
9.CO.10	Raslakite	Na₁₅Ca₃Fe²⁺₃(Na,Zr)₃Zr₃(Si,Nb)[(Si₃O₉)₂(Si₉O₂₇)₂SiO](OH,H₂O)₃(Cl,OH)	Trig. 3 : R3
9.CO.10	Johnsenite-(Ce)	Na₁₂(Ce₂Ca)Ca₆Mn₃Zr₃[Si₃O₉]₂[Si₉O₂₇SiO][Si₉O₂₇W(O)₃](CO₃)(OH,Cl)₂	Trig. 3m : R3m
9.CO.10	'UM2004-51-SiO:CaClFFeHNaNbTi'	Na₁₆Ca₆(Fe,Mn)₃Zr₃(Ti,Nb)Si₂₆O₇₂FCl_0.5 · nH₂O	Trig. 3m : R3m
9.CO.10	'UM1990-80-SiO:CaFeHMnNaNbREEZr'	Na₁₄Ca₄(Mn,Ca)₂Zr₃(Si₃O₉)₂(Si₉O₂₇)₂(Si,Nb,Al,Zr)₂(Fe,Mn,Al,Ti)₃(Na,Ce,La,Y,Mn)(Na,H₂O,K,Sr)(OH)_7-8
9.CO.10	'UM2003-39-SiO:CaClFeHHfNaNbSrTaTiZr'	Na₁₂(Na,K,Mn,Sr)₂Ca₅(Ca,Mn)(Zr,Hf)₃(Fe,◻,Ta)₃(Si,Nb,W)(Si,Al,Ti)Si₂₄O₇₂(OH,O)_3.5Cl · 1.2H₂O	Trig. 3m : R3m
9.CO.10	'UM2006-17-SiO:CaClFFeHMnNaZr'	Na₁₅(Ca₃Mn₃)Zr₃(Fe,Zr)₃SiSi(Si₃O₉)₂(Si₉O₂₇)₂O₂(OH,F,Cl)₃ · 2H₂O
9.CO.10	'UM2006-18-SiO:CaClFFeHMnNaZr'	Na₁₅Ca₃(Mn,Fe)₃Zr₃(Zr,Na)₃(Si,Nb)(S,Ti,Si)(Si₃O₉)₂(Si₉O₂₇)₂(O,OH)₅(Cl,F,H₂O)	Trig. 3 : R3
9.CO.10	Mogovidite	Na₉(Ca,Na)₁₂Fe₂Zr₃Si₂₅O₇₂(CO₃) (OH)₄	Trig. 3m : R3m
9.CO.10	'UM2006-28-SiO:CaHMnNaZr'	Na₃₃Ca₁₂Zr₆Mn₃(Mn,Nb,Ti)₂Si₅₀O₁₃₂(O,OH)₁₂(OH,H₂O,Cl)₁₀
9.CO.10	'Unnamed (Hypermanganese Eudialyte)'	Na₂₉Ca₁₂Zr₆[Si₄₈O₁₃₂(O,OH)₁₂]{[Na]₄[Si]₂}{[Mn]₃[Mn,Nb,Ti]₂}(OH,H₂O,Cl)₁₀	Trig. 3m(32/m) : R3m
9.CO.10	'Hydrorastsvetaevite'	(Na₁₁(H₃O)₁₁K₆(H₂O)_1.5Sr)Ca₁₂Fe₃Na₂MnZr₆Si₅₂O₁₄₄(OH)_4.5Cl_3.5	Trig. 3m : R3m
9.CO.10	'UM1999-36-SiO:CaCeHMnNaNbSrZr'	Na₁₇(Ca,Ce,Sr)₂Mn₃(Zr,Nb)₄Si₂₅O₇₃(O,OH,F,Cl)₅	Trig. 3 : R3
9.CO.10	'UM2000-66-SiO:CaClFeHMnNaNbSrZr'	Na₁₂(Ca,Mn)₆(Sr,Na,K)₃(Fe,Mn)₃(Zr,Nb)₄Si₂₅O₆₆(OH,Cl)₁₁	Trig. 3m : R3m
9.CO.10	Georgbarsanovite	Na₁₂(Mn,Sr,REE)₃Ca₆Fe²⁺₃Zr₃NbSi₂₅O₇₆Cl₂ · H₂O	Trig. 3m : R3m
9.CO.10	'Unnamed (Hydrated Hydrous Na-Ca-Mn-Fe-Zr-Ti Silicate Chloride)'	Na₃₇Ca₁₀Mn₂FeZr₆Si₅₀(Ti,Nb)₂O₁₄₄(OH)₅Cl₃ · H₂O	Trig. 3m : R3m
9.CO.10	Fengchengite	Na₁₂◻₃(Ca,Sr)₆Fe³⁺₃ Zr₃Si(Si₂₅O₇₃)(H₂O,OH)₃(OH,Cl)₂	Trig. 3m(32/m) : R3m
9.CO.10	Eudialyte	Na₁₅Ca₆Fe₃Zr₃Si(Si₂₅O₇₃)(O,OH,H₂O)₃(Cl,OH)₂	Trig. 3m(32/m) : R3m
9.CO.10	Alluaivite	Na₁₉(Ca,Mn)₆(Ti,Nb)₃Si₂₆O₇₄Cl · 2H₂O	Trig. 3m(32/m) : R3m
9.CO.10	'UM2010-06-SiO:CaFeHMnNaNbREETiZr'	[Na,(H₃O)]₁₅(Ca₃Mn₃)Na₃Zr₃(Si,Ti)[Si₂₅O₇₂OH](OH)₂ · 2H₂O
9.CO.10	Aqualite	(H₃O)₈(Na,K,Sr)₅Ca₆Zr₃Si₂₆O₆₆(OH)₉Cl	Trig. 3 : R3
9.CO.10	Andrianovite	Na₁₂(K,Sr,Ce)₃Ca₆Mn₃Zr₃Nb(Si₂₅O₇₃)(O,H₂O,OH)₅	Trig. 3m : R3m
9.CO.10	Dualite	Na₃₀(Ca,Na,Ce,Sr)₁₂(Na,Mn,Fe,Ti)₆Zr₃Ti₃Mn[Si₅₁O₁₄₄](OH,H₂O,Cl)₉	Trig. 3m : R3m
9.CO.10	Ferrokentbrooksite	Na₁₅Ca₆(Fe,Mn)₃Zr₃NbSi₂₅O₇₃(O,OH,H₂O)₃Cl₂	Trig. 3m : R3m
9.CO.10	Siudaite	Na₈(Mn²⁺₂Na)Ca₆(Fe³⁺,Mn²⁺)₃Zr₃NbSi₂₄(Si,◻,Ti)O₇₄(OH)₂Cl · 5H₂O	Trig. 3m : R3m
9.CO.10	Voronkovite	Na₁₅(Na,Ca,Ce)₃(Mn,Ca)₃Fe₃Zr₃Si₂₆O₇₂(OH,O)₄Cl · H₂O	Trig. 3 : R3
9.CO.10	Manganoeudialyte	Na₁₄Ca₆Mn₃Zr₃[Si₂₆O₇₂(OH)₂](H₂O,Cl,O,OH)₆	Trig. 3m : R3m
9.CO.10	Rastsvetaevite	Na₂₇K₈Ca₁₂Fe₃Zr₆Si₅₂O₁₄₄(O,OH,H₂O)₆Cl₂	Trig. 3m : R3m
9.CO.10	Amableite-(Ce)	Na₁₅[(Ce_1.5Na_1.5)Mn₃]Mn₂Zr₃◻Si[Si₂₄O₆₉(OH)₃](OH)₂ · H₂O	Trig. 3 : R3
9.CO.10	Khomyakovite	Na₁₂Sr₃Ca₆Fe₃Zr₃W[Si₂₅O₇₃](O,OH,H₂O)₃(OH,Cl)₂	Trig. 3m : R3m

Other InformationHide

Electrical:

Pyroelectric.

Health Risks:

No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for KentbrooksiteHide

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https://www.mindat.org/min-7132.html
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Raman and XRD data at RRUFF project

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References for KentbrooksiteHide

Reference List:

Jambor, J.L. and Roberts, A.C. (1999) New mineral names. American Mineralogist: 84: 193-198.

Rastsvetaeva, R.K., Khomyakov, A.P., Nekrasov, Y.V. (1999) Crystal structure of a novel analog of eudialyte with R3 symmetry. Crystallography Reports: 44: 765-769.

Ekimenkova, I.A., Rastsvetaeva, R.K., Khomyakov, A.P. (2000) Crystal structure of the Fe,Cl-analogue of kentbrooksite. Doklady Chemistry: 370: 17-20.

Jambor, J.L., Roberts, A.C. (2001) New mineral names. American Mineralogist: 86: 939-942.

Johnsen, O., Ferraris, G., Gault, R. A., Grice, J. D., Kampf, A. R., Pekov, I. V. (2003) The nomenclature of eudialyte-group minerals. The Canadian Mineralogist, 41 (3) 785-794 doi:10.2113/gscanmin.41.3.785

Khomyakov, A.P., Nechelyustov, G.N., and Rastsvetaeva, R.K. (2007) Aqualite, (H3O)8(Na,K,Sr)5Ca6Zr3Si26O66(OH)9Cl, a new eudialyte-group mineral from Inagli alkaline massif (Sakha-Yakutia, Russia), and the problem of oxonium in hydrated eudialytes. Proceedings of the Russian Mineralogical Society (Zapiski RMO): 136(2): 39-55.

Rastsvetaeva, R. K., Chukanov, N. V. (2012) Classification of eudialyte-group minerals. Geology of Ore Deposits, 54 (7) 487-497 doi:10.1134/s1075701512070069

(2022) Kentbrooksite. Handbook of Mineralogy. Mineralogical Society of America

Localities for KentbrooksiteHide

Showing 31 localities.

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the

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Locality ListHide

- This locality has map coordinates listed.

- This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality.

- Good crystals or important locality for species.

- World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). ~~Struck out~~ - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.


Brazil
Minas Gerais ⓘ Poços de Caldas	Färber (n.d.)
ⓘ Bortolan quarry	Vanrusselt (2023)
ⓘ Poços de Caldas alkaline complex	Atencio et al. (2000) +2 other references

Canada
Northwest Territories North Slave Region Blachford Lake alkaline complex Thor Lake syenite complex ⓘ Nechalacho deposit	MÖLLER (2016)
Québec Montérégie La Vallée-du-Richelieu RCM Mont Saint-Hilaire ⓘ Poudrette quarry (De-Mix quarry; Demix quarry; Uni-Mix quarry; Carrière Mont Saint-Hilaire; MSH)	HORVÁTH et al. (2000)

Greenland (TL)
Sermersooq Kangerlussuaq Fjord Amdrup Firth ⓘ Kentbrooksite occurrence (TL)	Eur. J. Mineral. +1 other reference
ⓘ Citadellet	Distribution and mineralogy of rare earth element–Zr–Nb–Ta mineralisation within pegmatite sheets at Citadellet et al. (Trans. Inst. Min. Metall. B)
Kangerlussuaq Fjord (Søndre Strømfjord) ⓘ Kangerlussuaq Alkaline Complex	Brooks (2011)

Guinea
Conakry Region Los Archipelago (Los Islands) ⓘ Rouma Island	Perchiazzi et al. (2025)

Norway
Telemark Porsgrunn Auenlandet Sagåsen ⓘ Sagåsen Quarry ?	Larsen et al. (2005) +1 other reference

Portugal
Azores São Miguel ⓘ Água de Pau Volcano	Samples collected by Luigi Chiappino ... +1 other reference

Russia
Murmansk Oblast ⓘ Koashva Mt	PEKOV et al. (2013)
Kukisvumchorr Mt East slope Tuliok River head ⓘ Unnamed pegmatite	Pavel M. Kartashov (n.d.)
ⓘ Lovozero Massif	...
Lovozersky District Alluaiv Mountain ⓘ Umbozero mine	Pavel M. Kartashov (n.d.)
ⓘ Umbozero North quarry	Pavel M. Kartashov (n.d.)
ⓘ Karnasurt Mountain	Ivanyuk et al. (2015)
ⓘ Kedykverpakhk Mountain	Ivanyuk et al. (2015)
Seidozero Lake ⓘ Lepkhe-Nel'm Mt	... +2 other references
ⓘ Rischorr Mt	maurice.strahlen.org (n.d.)
ⓘ Yukspor Mountain
Hackman Valley ⓘ Lovchorrite Mine	Pekov et al. (2003)

South Africa
North West Bojanala Platinum District Municipality Moses Kotane Local Municipality ⓘ Pilanesberg Alkaline Ring Complex	R. Liferovich -L. Horváth p.c. 2004 +1 other reference

Spain
Canary Islands Santa Cruz de Tenerife Province Tenerife Arico ⓘ ~~Tajao~~	Dill et al. (2023)
Arona ⓘ ~~Centinela~~	Dill et al. (2023)
ⓘ ~~Los Humilladeros~~	Dill et al. (2023)
ⓘ Sanidinite occurrence	"Christof Schäfer"
Santa Cruz de Tenerife ⓘ ~~Santa Cruz~~	Dill et al. (2023)

Tajikistan
Districts of Republican Subordination ⓘ Dara-i-Pioz Massif	Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 132 (6) +1 other reference

USA
New Mexico Otero County Cornudas Mountains ⓘ Wind Mountain	Dr. W. Stoll (private communication 2001 & 2004)
Wisconsin Marathon County Wausau Intrusive Complex ⓘ Stettin pluton	Falster et al. (2014)

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Kentbrooksite

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