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Tadzhikite-(Ce)

A valid IMA mineral species

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Tadzhikite-(Ce)

Dara-i-Pioz Massif, Districts of Republican Subordination, Tajikistan

Tadzhikite-(Ce), etc.

Sagåsen Quarry, Sagåsen, Auenlandet, Porsgrunn, Telemark, Norway

Tadzhikite-(Ce)

Dara-i-Pioz Massif, Districts of Republican Subordination, Tajikistan

Tadzhikite-(Ce)

Dara-i-Pioz Massif, Districts of Republican Subordination, Tajikistan

Tadzhikite-(Ce), etc.

Sagåsen Quarry, Sagåsen, Auenlandet, Porsgrunn, Telemark, Norway

Tadzhikite-(Ce)

Dara-i-Pioz Massif, Districts of Republican Subordination, Tajikistan

Tadzhikite-(Ce)

Dara-i-Pioz Massif, Districts of Republican Subordination, Tajikistan

Tadzhikite-(Ce), etc.

Sagåsen Quarry, Sagåsen, Auenlandet, Porsgrunn, Telemark, Norway

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About Tadzhikite-(Ce)Hide

Flag of Tajikistan

Formula:

Ca₄Ce³⁺₂Ti◻₂(B₄Si₄O₂₂)(OH)₂

Colour:

Brown, grey

Lustre:

Vitreous

Hardness:

Specific Gravity:

3.73 - 3.86

Crystal System:

Monoclinic

Member of:

Hellandite Group

Name:

Named by A.F. Efimov, V.D. Dusmatov, V.Y. Alkhazov, Z.G. Pudovkina, and M.Y. Kazakova in 1970 for the country of the type locality. The name is from an alternate spelling for the Republic of Tajikistan, and the suffix indicates the dominant REE.

Type Locality:

ⓘ Dara-i-Pioz Massif, Districts of Republican Subordination, Tajikistan

Specimens of tadzhikite-(Ce) from the type locality have earlier erroneously been labelled as tadzhikite-(Y). The mineral, which originally was named as tadzhikite (without the suffix), was described by Efimov et al. (1970) as two varieties: "tadzhikikite-I" and "tadzhikite-II". The "tadzhikite-I" is enriched in Y relative to "tadzhikite-II", and was thus informally named as tadzhikite-(Y) by Pekov (1988). However, structural analysis has established that the mineral is in fact Ce-dominant (Hawthorne et al., 1988); Oberti et al., 2002).

Unique IdentifiersHide

Mindat ID:

3866

Long-form identifier:

mindat:1:1:3866:5

IMA Classification of Tadzhikite-(Ce)Hide

IMA status:

Approved

IMA status notes:

Renamed by the IMA

IMA Formula:

Ca₄Ce³⁺₂Ti⁴⁺◻(B₄Si₄O₂₂)(OH)₂

Approval year:

1969

Approval history:

Approved by IMA in 1969 as tadzhikite.
Tadzhikite was renamed as tadzhikite-(Ce) by IMA in 2000 (special procedure 00-F)

Type description reference:

Efimov, A.F., Dusmatov, V.D., Alkhazov, V.Y., Pudovkina, Z.G., Kazakova, M.Y. (1970) Tadzhikite, a new borosilicate of the rare earths of the hellandite group. Doklady Akademii Nauk SSSR: 195: 1190-1193.

Classification of Tadzhikite-(Ce)Hide

Strunz-mindat (2026):

9.DK.20

9 : SILICATES (Germanates)
D : Inosilicates
K : Inosilicates with 5-periodic single chains

Hey's CIM Ref.:

17.5.19

17 : Silicates Containing other Anions
5 : Borosilicates

Mineral SymbolsHide

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

Symbol	Source	Reference for Standard
Tad-Ce	IMA–CNMNC	Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of Tadzhikite-(Ce)Hide

Lustre:

Vitreous

Transparency:

Translucent, Opaque

Colour:

Brown, grey

Streak:

White

Hardness:

6 on Mohs scale

Parting:

Parting on {010}

Density:

3.73 - 3.86 g/cm³ (Measured) 3.77 g/cm³ (Calculated)

Optical Data of Tadzhikite-(Ce)Hide

Type:

Biaxial (+/-)

RI values:

n_α = 1.750 - 1.761 n_β = 1.767 n_γ = 1.763 - 1.772

2V:

Measured: 80° to 92°

Max. Birefringence:

δ = 0.011 - 0.013
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:

Very 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 biaxial acute bisectrix (Bxa) interference figure - the conoscopic view for a grain cut perpendicular to the acute bisectrix, using this mineral's 2V. The two small white dots mark the melatopes - the points where the two optic axes emerge - and are shown only when they fall within the field of view. The coloured bands are isochromatics, and the dark bands are isogyres.

Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.

Thickness: 30 µm

Stage rotation: 0°

Dispersion:

distinct to strong

Chemistry of Tadzhikite-(Ce)Hide

Mindat Formula:

Ca₄Ce³⁺₂Ti◻₂(B₄Si₄O₂₂)(OH)₂

Element Weights:

Element	% weight
O	37.280 %
Ce	27.207 %
Ca	15.564 %
Si	10.907 %
Ti	4.647 %
B	4.199 %
H	0.196 %

Calculated from ideal end-member formula.

Elements listed:

B, Ca, Ce, H, O, Si, Ti - search for minerals with similar chemistry

Crystallography of Tadzhikite-(Ce)Hide

Crystal System:

Monoclinic

Class (H-M):

2/m - Prismatic

Space Group:

P2/b

Setting:

P2/a

Cell Parameters:

a = 18.946(4) Å, b = 4.714(4) Å, c = 10.302(2) Å
β = 11.58(2)°

Ratio:

a:b:c = 4.019 : 1 : 2.185

Unit Cell V:

184.69 Å³ (Calculated from Unit Cell)

Crystal StructureHide

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Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4

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CIF File Best | x | y | z | a | b | c

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

ID	Species	Reference	Link	Year	Locality	Pressure (GPa)	Temp (K)
0005547	Tadzhikite-(Ce)	Hawthorne F C, Cooper M A, Taylor M C (1998) Refinement of the crystal structure of tadzhikite The Canadian Mineralogist 36 817-822		1998	Dara-i-Pioz, Tadzhikistan	0	293
0015611	Tadzhikite-(Ce)	Chernitsova N M, Pudovkina Z V, Pyatenko Y A (1982) About the crystal structure of tadzhikite {(Ca,Tr)4(Y,Tr)2(Ti,Fe,Al)(O,OH)2 [Si4B4O22]} Soviet Physics Doklady 27 367-368		1982		0	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Tadzhikite-(Ce)'
loop_
_publ_author_name
'Hawthorne F C'
'Cooper M A'
'Taylor M C'
_journal_name_full 'The Canadian Mineralogist'
_journal_volume 36 
_journal_year 1998
_journal_page_first 817
_journal_page_last 822
_publ_section_title
;
 Refinement of the crystal structure of tadzhikite
;
_database_code_amcsd 0005547
_chemical_compound_source 'Dara-i-Pioz, Tadzhikistan'
_chemical_formula_sum 'Si4 Ti.56 Fe.3 Al.07 Mn.04 B4 Ca2.86 Y.9 Na.24 Ce.82 Nd.4 La.2 Dy.12 Pr.08 Gd.08 Sm.08 Er.04 O24 H6'
_cell_length_a 19.058
_cell_length_b 4.729
_cell_length_c 10.321
_cell_angle_alpha 90
_cell_angle_beta 111.39
_cell_angle_gamma 90
_cell_volume 866.112
_exptl_crystal_density_diffrn      4.049
_symmetry_space_group_name_H-M 'P 1 2/a 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2-x,y,-z'
  '1/2+x,-y,z'
  '-x,-y,-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
Si1   0.10250   0.48470   0.64800   1.00000   0.02000
Si2   0.38700   0.49630   0.83650   1.00000   0.02000
Ti   0.00000   0.00000   0.00000   0.56000   0.02200
Fe   0.00000   0.00000   0.00000   0.30000   0.02200
Al   0.00000   0.00000   0.00000   0.07000   0.02200
Mn   0.00000   0.00000   0.00000   0.04000   0.02200
B1   0.17240   0.52380   0.45150   1.00000   0.01700
B2   0.24650   0.45820   0.86500   1.00000   0.01500
Ca1   0.25210   0.00110   0.34020   1.00000   0.02100
Ca2   0.34430   0.96150   0.07030   0.43000   0.02000
Y2   0.34430   0.96150   0.07030   0.45000   0.02000
Na2   0.34430   0.96150   0.07030   0.12000   0.02000
Ce1   0.03850   0.01470   0.35930   0.18000   0.01100
Nd1   0.03850   0.01470   0.35930   0.09000   0.01100
La1   0.03850   0.01470   0.35930   0.04000   0.01100
Dy1   0.03850   0.01470   0.35930   0.03000   0.01100
Pr1   0.03850   0.01470   0.35930   0.02000   0.01100
Gd1   0.03850   0.01470   0.35930   0.02000   0.01100
Sm1   0.03850   0.01470   0.35930   0.02000   0.01100
Er1   0.03850   0.01470   0.35930   0.01000   0.01100
Ce2  -0.04750   0.08090   0.63690   0.03000   0.01100
Nd2  -0.04750   0.08090   0.63690   0.02000   0.01100
La2  -0.04750   0.08090   0.63690   0.01000   0.01100
Ce3   0.03710   0.12250   0.35850   0.03000   0.01100
Nd3   0.03710   0.12250   0.35850   0.01000   0.01100
La3   0.03710   0.12250   0.35850   0.01000   0.01100
Ce4   0.04740   0.02300   0.36280   0.17000   0.01100
Nd4   0.04740   0.02300   0.36280   0.08000   0.01100
La4   0.04740   0.02300   0.36280   0.04000   0.01100
Dy4   0.04740   0.02300   0.36280   0.03000   0.01100
Pr4   0.04740   0.02300   0.36280   0.02000   0.01100
Gd4   0.04740   0.02300   0.36280   0.02000   0.01100
Sm4   0.04740   0.02300   0.36280   0.02000   0.01100
Er4   0.04740   0.02300   0.36280   0.01000   0.01100
O1   0.45670   0.25250   0.43410   0.20000   0.02600
O-H1   0.45670   0.25250   0.43410   0.80000   0.02600
O2   0.32260   0.31550   0.24300   1.00000   0.02700
O3   0.07190   0.70020   0.73290   0.35000   0.03000
O-H3   0.07190   0.70020   0.73290   0.65000   0.03000
O4   0.13290   0.66600   0.54160   0.80000   0.02600
O-H4   0.13290   0.66600   0.54160   0.20000   0.02600
O5   0.46190   0.19640   0.13080   1.00000   0.03100
O6   0.25370   0.75450   0.13980   1.00000   0.02700
O7   0.16730   0.22880   0.44730   0.35000   0.02600
O-H7   0.16730   0.22880   0.44730   0.65000   0.02600
O8   0.13300   0.67130   0.30960   0.65000   0.03000
O-H8   0.13300   0.67130   0.30960   0.35000   0.03000
O9   0.31250   0.32860   0.83920   1.00000   0.02900
O10   0.08640   0.72940   0.04310   1.00000   0.02700
O11   0.05380   0.25780   0.15840   0.65000   0.02800
O-H11   0.05380   0.25780   0.15840   0.35000   0.02800
O12   0.25000   0.33150   0.00000   1.00000   0.02900
O13   0.25000   0.64940   0.50000   1.00000   0.02700
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Si1 0.01900 0.02800 0.01300 0.00000 0.00600 0.00000
Si2 0.01900 0.02700 0.01200 0.00100 0.00600 0.00000
Ti 0.01900 0.03000 0.01400 0.00100 0.00200 -0.00300
Fe 0.01900 0.03000 0.01400 0.00100 0.00200 -0.00300
Al 0.01900 0.03000 0.01400 0.00100 0.00200 -0.00300
Mn 0.01900 0.03000 0.01400 0.00100 0.00200 -0.00300
B1 0.01500 0.02700 0.00900 0.00200 0.00400 0.00100
B2 0.01700 0.02200 0.00800 0.00100 0.00500 0.00400
Ca1 0.02200 0.02900 0.01100 0.00000 0.00700 0.00100
Ca2 0.01700 0.03000 0.01300 0.00000 0.00700 -0.00100
Y2 0.01700 0.03000 0.01300 0.00000 0.00700 -0.00100
Na2 0.01700 0.03000 0.01300 0.00000 0.00700 -0.00100
O1 0.03000 0.03200 0.01600 0.00500 0.00900 0.00200
O-H1 0.03000 0.03200 0.01600 0.00500 0.00900 0.00200
O2 0.02400 0.03400 0.02000 0.00000 0.00600 0.00200
O3 0.02900 0.03600 0.02000 0.01000 0.00500 -0.00100
O-H3 0.02900 0.03600 0.02000 0.01000 0.00500 -0.00100
O4 0.02900 0.03200 0.02100 -0.00100 0.01300 0.00200
O-H4 0.02900 0.03200 0.02100 -0.00100 0.01300 0.00200
O5 0.03200 0.04300 0.01900 0.00700 0.01100 0.00300
O6 0.02900 0.03600 0.01900 0.00200 0.01100 0.00200
O7 0.02200 0.03700 0.01700 -0.00400 0.00600 0.00000
O-H7 0.02200 0.03700 0.01700 -0.00400 0.00600 0.00000
O8 0.03600 0.03500 0.01400 0.00200 0.00400 0.00200
O-H8 0.03600 0.03500 0.01400 0.00200 0.00400 0.00200
O9 0.02500 0.03700 0.02800 -0.00400 0.01300 -0.00500
O10 0.02200 0.03800 0.02000 0.00200 0.00700 0.00300
O11 0.02800 0.03800 0.01800 -0.01000 0.00800 -0.00100
O-H11 0.02800 0.03800 0.01800 -0.01000 0.00800 -0.00100
O12 0.03700 0.03800 0.01000 0.00000 0.00800 0.00000
O13 0.02500 0.03200 0.02400 0.00000 0.01000 0.00000

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
2.65 Å	(100)
1.913 Å	(55)
4.96 Å	(30)
2.94 Å	(30)
1.665 Å	(30)
2.86 Å	(25)
2.19 Å	(25)

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 Tadzhikite-(Ce)Hide

Type Locality:

ⓘ Dara-i-Pioz Massif, Districts of Republican Subordination, Tajikistan

General Appearance of Type Material:

prismatic crystals

Place of Conservation of Type Material:

A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 73374, 74575, 74965, vis3328.

Associated Minerals at Type Locality:

Aegirine	Arfvedsonite	Ekanite	Eudialyte	Microcline
Polylithionite	Pyrochlore Group	Quartz	Riebeckite	Tienshanite
Titanite

Reference:

Synonyms of Tadzhikite-(Ce)Hide

Other Language Names for Tadzhikite-(Ce)Hide

Dutch:Tadzhikiet-(Ce)

German:Tadzhikit-(Ce)
Tadshikit

Russian:Таджикит-(Ce)

Simplified Chinese:塔吉克石

Traditional Chinese:塔吉克石

Relationship of Tadzhikite-(Ce) to other SpeciesHide

Member of:

Hellandite Group

Other Members of Hellandite Group:

Ciprianiite	Ca₄[(Th,U),Ca]_Σ2Al(Be_0.5◻_1.5)_Σ2[B₄Si₄O₂₂](OH)₂	Mon. 2/m : P2/b
Ferri-hellandite-(Ce)	(Ca₃Ce)Ce₂Fe³⁺◻₂B₄Si₄O₂₂(OH)₂	Mon. 2/m : P2/b
Ferri-mottanaite-(Ce)	Ca₄Ce₂Fe³⁺(Be_1.5◻_0.5)[Si₄B₄O₂₂]O₂	Mon. 2/m : P2/b
Hellandite-(Ce)	(Ca,REE)₄Ce₂Al◻₂(B₄Si₄O₂₂) (OH)₂	Mon. 2/m
Hellandite-(Y)	(Ca,REE)₄Y₂Al◻₂(B₄Si₄O₂₂) (OH)₂	Mon. 2/m : P2/b
Mottanaite-(Ce)	Ca₄(Ce,REE)_Σ2Al(Be_1.5◻_0.5)_Σ2[B₄Si₄O₂₂]O₂	Mon. 2/m

Common AssociatesHide

Associations Based on Photo Data:

3 photos of Tadzhikite-(Ce) associated with Zirsilite-(Ce)	Na_11-12(Ce,Na)₃Ca₆Mn₃Zr₃Nb(Si₁₉O₅₅)(Si₃O₉)₂(CO₃)(OH)₃ · H₂O
1 photo of Tadzhikite-(Ce) associated with Microcline	K(AlSi₃O₈)
1 photo of Tadzhikite-(Ce) associated with Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
1 photo of Tadzhikite-(Ce) associated with Hornblende Root Name Group	◻Ca₂(C²⁺₄C³⁺)(AlSi₇O₂₂)W₂
1 photo of Tadzhikite-(Ce) associated with Ferrokentbrooksite	Na₁₅Ca₆(Fe,Mn)₃Zr₃NbSi₂₅O₇₃(O,OH,H₂O)₃Cl₂
1 photo of Tadzhikite-(Ce) associated with Fluorite	CaF₂
1 photo of Tadzhikite-(Ce) associated with Sanidine	K(AlSi₃O₈)
1 photo of Tadzhikite-(Ce) associated with Rinkite-(Y)	Na₂Ca₄YTi(Si₂O₇)₂OF₃
1 photo of Tadzhikite-(Ce) associated with Quartz	SiO₂
1 photo of Tadzhikite-(Ce) associated with Titanite	CaTiO(SiO₄)

Related Minerals - Strunz-mindat Grouping Hide

9.DK.	Ferrorhodonite	CaMn₃Fe[Si₅O₁₅]	Tric. 1 : P1
9.DK.	Vittinkiite	MnMn₃Mn[Si₅O₁₅]	Tric. 1 : P1
9.DK.	Ferri-hellandite-(Ce)	(Ca₃Ce)Ce₂Fe³⁺◻₂B₄Si₄O₂₂(OH)₂	Mon. 2/m : P2/b
9.DK.	Shijiangshanite	Pb₃CaAl(Si₅O₁₄)(OH)₃ · 3H₂O	Trig. 3m : R3c
9.DK.05	Nambulite	LiMn²⁺₄Si₅O₁₄(OH)	Tric.
9.DK.05	Marsturite	NaCaMn₃Si₅O₁₄(OH)	Tric. 1 : P1
9.DK.05	Natronambulite	(Na,Li)(Mn,Ca)₄Si₅O₁₄OH	Tric.
9.DK.05	Rhodonite	CaMn₃Mn[Si₅O₁₅]	Tric. 1
9.DK.05	Scandiobabingtonite	(Ca,Na)₂(Fe²⁺,Mn)(Sc,Fe³⁺)Si₅O₁₄(OH)	Tric.
9.DK.05	Lithiomarsturite	LiCaMn₃Si₅O₁₄(OH)	Tric. 1 : P1
9.DK.05	Manganbabingtonite	Ca₂Mn²⁺Fe³⁺Si₅O₁₄(OH)	Tric. 1 : P1
9.DK.05	Fowlerite	(Mn²⁺,Zn,Ca)SiO₃
9.DK.05	Babingtonite	Ca₂Fe²⁺Fe³⁺Si₅O₁₄(OH)	Tric. 1 : P1
9.DK.10	Santaclaraite	CaMn₄[Si₅O₁₄OH](OH) · H₂O	Tric. 1 : P1
9.DK.15	Saneroite	NaMn²⁺₅[Si₅O₁₄(OH)](VO₃)(OH)	Tric. 1 : P1
9.DK.20	Ferri-mottanaite-(Ce)	Ca₄Ce₂Fe³⁺(Be_1.5◻_0.5)[Si₄B₄O₂₂]O₂	Mon. 2/m : P2/b
9.DK.20	'Hellandite-(Yb)'	(Ca,Y)₄(Yb,Y)₂(Al,Fe³⁺,Ti⁴⁺)(Be,Li)₂[B₄Si₄O₂₂](O,F,OH)₂
9.DK.20	Mottanaite-(Ce)	Ca₄(Ce,REE)_Σ2Al(Be_1.5◻_0.5)_Σ2[B₄Si₄O₂₂]O₂	Mon. 2/m
9.DK.20	Ciprianiite	Ca₄[(Th,U),Ca]_Σ2Al(Be_0.5◻_1.5)_Σ2[B₄Si₄O₂₂](OH)₂	Mon. 2/m : P2/b
9.DK.20	Hellandite-(Y)	(Ca,REE)₄Y₂Al◻₂(B₄Si₄O₂₂) (OH)₂	Mon. 2/m : P2/b
9.DK.20	Hellandite-(Ce)	(Ca,REE)₄Ce₂Al◻₂(B₄Si₄O₂₂) (OH)₂	Mon. 2/m

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Health Risks:

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References for Tadzhikite-(Ce)Hide

Reference List:

Doklady Akademii Nauk SSSR, Earth Science Sections: 195: 136-139.

Transactions (Doklady) of the USSR Academy of Sciences, Earth Science Sections (1970): 195: 136.

Fleischer, Michael (1971) New Mineral Names. American Mineralogist, 56 (9-10) 1838-1840

Chernitsova, N.M., Pudovkina, Z.V., Pyatenko, Y.A. (1982) About the crystal structure of tadzhikite {(Ca,Tr)4(Y,Tr)2(Ti,Fe,Al)(O,OH)2[Si4B4O22]}. Soviet Physics - Doklady: 27: 367-368.

Nickel, Ernest H., Mandarino, Joseph A. (1987) Procedures involving the IMA Commission on New Minerals and Mineral Names and guidelines on mineral nomenclature. American Mineralogist, 72 (9-10) 1031-1042

Grew, Edward S.; Anovitz, Lawrence M. - Eds. (1996) Boron - Mineralogy, Petrology and Geochemistry. Reviews in Mineralogy Vol. 33. Mineralogical Society of America p.862

Hawthorne, F.C., Cooper, M.A., Taylor, M.C. (1998) Refinement of the crystal structure of tadzhikite. The Canadian Mineralogist: 36: 817-822.

Reguir, Ekaterina P., Chakhmouradian, Anton R., Evdokimov, Mikhail D. (1999) The mineralogy of a unique baratovite- and miserite-bearing quartz-albite-aegirine rock from the Dara-i-Pioz Complex, northern Tajikistan. The Canadian Mineralogist, 37 (6) 1369-1384

Oberti, Roberta, Ottolini, Luisa, Camara, Fernando, Della Ventura, Giancarlo (1999) Crystal structure of non-metamict Th-rich hellandite-(Ce) from Latium (Italy) and crystal chemistry of the hellandite-group minerals. American Mineralogist, 84 (5) 913-921 doi:10.2138/am-1999-5-626

(2001) Tadzhikite-(Ce). Handbook of Mineralogy. Mineralogical Society of America

Oberti, Roberta, Ventura, Giancarlo Della, Ottolini, Luisa, Hawthorne, Frank C., Bonazzi, Paola (2002) Re-definition, nomenclature and crystal-chemistry of the hellandite group. American Mineralogist, 87 (5) 745-752 doi:10.2138/am-2002-5-618

Grice, J. D.; Ferraris, G. (2003) New minerals approved in 2002 and nomenclature modifications approved in 1998-2002 by the Commission on the New Minerals and Mineral Names, International Mineralogical Association. The Canadian Mineralogist, 41 (3). 795-802 doi:10.2113/gscanmin.41.3.795

Localities for Tadzhikite-(Ce)Hide

Showing 19 localities.

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

symbol to view information about a locality. 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.


Canada
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) ?	A. McDonald & L. Horvath pers. comm. +2 other references

Italy
Lazio Viterbo Province Vetralla ⓘ Tre Croci	BERNABE' E. (1987)
Viterbo ⓘ Le Carcarelle	Thorne (n.d.)

Kyrgyzstan
Batken Region Batken District ⓘ Hodzha-Achkan (Hodjaachkan) massif	Pautov et al. (2013)

Norway
Telemark Porsgrunn Auenlandet Sagåsen ⓘ Saga 1 Quarry	Engvoldsen et al. (1991)
ⓘ Sagåsen Quarry ?	Larsen et al. (2005)
Bjørkøya ⓘ Risøysund
ⓘ Trompetholmen	Larsen et al. (2010)
Vestfold Larvik Commune Barkevik area ⓘ Barkevika	+1 other reference
ⓘ Barkevikstranda	Larsen et al. (2010)
ⓘ Barkevikskjær	Andersen et al. (1996)
ⓘ Kjeøya	- (n.d.)
ⓘ Melanocerite typelocality
ⓘ Skutesundskjær	Andersen et al. (1996)
ⓘ Låven	Engvoldsen et al. (1991)
Tvedalen ⓘ Johs Nilsens Quarry	Peter Andresen collection
Vesle Arøya ⓘ Eudidymite-Epididymite locality	Engvoldsen et al. (1991)

Sweden
Jönköping County Jönköping Gränna ⓘ ~~Norra Kärr~~	Christian Brand coll.

Tajikistan (TL)
Districts of Republican Subordination ⓘ Dara-i-Pioz Massif (TL)	Efimov et al. (1970) +2 other references

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Tadzhikite-(Ce)

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Related Minerals - Strunz-mindat Grouping Hide