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Hiortdahlite

A valid IMA mineral species

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Hiortdahlite

San Vito Quarry, San Vito, Ercolano, Metropolitan City of Naples, Campania, Italy

Hiortdahlite

Laacher See Volcanic Complex, Germany

Hiortdahlite

Mount Somma, Metropolitan City of Naples, Campania, Italy

Hiortdahlite

San Vito Quarry, San Vito, Ercolano, Metropolitan City of Naples, Campania, Italy

Hiortdahlite

Laacher See Volcanic Complex, Germany

Hiortdahlite

Mount Somma, Metropolitan City of Naples, Campania, Italy

Hiortdahlite

San Vito Quarry, San Vito, Ercolano, Metropolitan City of Naples, Campania, Italy

Hiortdahlite

Laacher See Volcanic Complex, Germany

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About HiortdahliteHide

Thorstein H. Hiortdahl

Formula:

Na₂Ca₄(Ca_0.5Zr_0.5)Zr(Si₂O₇)2OF₃

Formula revised by IMA , Sept. 2020 (Proposal 20-D)

Colour:

Yellow, yellowish-brown, green

Lustre:

Vitreous

Hardness:

5 - 5½

Specific Gravity:

3.25 - 3.31

Crystal System:

Triclinic

Member of:

Wöhlerite Group

Name:

Named by W.C. Brögger in 1890 in honor of Thorstein Hallager Hiortdahl (04 May 1839, Bergen, Norway - 29 October 1925, Oslo, Norway), chemist, mineralogist, crystallographer, and politician.

A sorosilicate mineral belonging to the Wöhlerite Group with crystal structure containing two topologically independent ochtahedral walls.

Originally reported by Brøgger (1888, 1890) from "Mittel-Arø", Langesundsfjorden, Norway. He referred to a 10 cm wide nepheline-syenite pegmatite dike at Langodden, Arøyskjærene, Langesundsfjorden.

Merlino & Perchiazzi (1985) determined the crystal structure of hiortdahlite from the Langesundsfjorden area, and designated it as hiortdahlite I, since the structure was slightly different from hiortdahlite from Kipawa River, Canada. The later was designated as hiortdahlite II. Hiorthdahlite II was not never formally submitted to IMA. Newer investigations is needed to establish if hiorthdahlite II is a polytype or a distinct species (Dal Bo et al. 2022).

New chemical data and crystal refinement on a sample from the type locality was presented by Dal Bo et al. (2022) and a new end-member formula with one cationic site characterised by a valancy-imposed double-site occupancy ((Ca²⁺_0.5Zr⁴⁺_0.5^Σ3+)) on the X7-site was approved by IMA-CNMNC in 2020.

Unique IdentifiersHide

Mindat ID:

1909

Long-form identifier:

mindat:1:1:1909:1

Similar NamesHide

Hiortdahlite II

Valid as an unnamed mineral

(Na,Ca)₄Ca₈Zr₂(Y,Zr,REE,Na)₂(Si₂O₇)₄(O₃F₅)

IMA Classification of HiortdahliteHide

IMA status:

Approved

IMA status notes:

Renamed by the IMA

IMA Formula:

Na₂Ca₄(Ca_0.5Zr⁴⁺_0.5)Zr⁴⁺(Si₂O₇)₂OF₃

First published:

1890

Approval history:

Renamed by IMA: 1985
Approved special procedure IMA 1987
Formula revised by IMA 2020 (Proposal 20-D) as Na₂Ca₄(Ca_0.5Zr_0.5)Zr(Si₂O₇)₂OF₃.

Type description reference:

Brøgger, W. C. (1888) Vorläufige Mittheilung über den "Hiortdahlit", ein neues Mineral von Arö, Norwegen [Preliminary communication on the "Hiortdahlite", a new mineral from Arö, Norway]. Nyt magazin for naturvidenskaberne [New magazine for the natural sciences], 31 (3). 232-239

Classification of HiortdahliteHide

Strunz-mindat (2026):

9.BE.17

9 : SILICATES (Germanates)
B : Sorosilicates
E : Si₂O₇ groups, with additional anions; cations in octahedral [6] and greater coordination

Dana 8th ed.:

56.2.4.7

56 : SOROSILICATES Si₂O₇ Groups, With Additional O, OH, F and H₂O
2 : Si₂O₇ Groups and O, OH, F, and H₂O with cations in [4] and/or >[4] coordination

Hey's CIM Ref.:

17.1.22

17 : Silicates Containing other Anions
1 : Silicates with fluoride (not containing Al)

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
Hio	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 HiortdahliteHide

Lustre:

Vitreous

Transparency:

Translucent

Comment:

Vitreous on crystal faces, greasy on fractures

Colour:

Yellow, yellowish-brown, green

Hardness:

5 - 5½ on Mohs scale

Tenacity:

Very brittle

Cleavage:

Distinct/Good
Distinct on {110) and {110)

Density:

3.25 - 3.31 g/cm³ (Measured) 3.22(2) g/cm³ (Calculated)

Optical Data of HiortdahliteHide

Type:

Biaxial (+)

RI values:

n_α = 1.639 - 1.658 n_β = 1.643 - 1.664 n_γ = 1.646 - 1.671

2V:

Measured: 80° , Calculated: 80° to 86°

Max. Birefringence:

δ = 0.007 - 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:

Moderate

Dispersion:

r < v strong

Comments:

X = nearly colorless, Y = bright yellow, Z = wine-yellow

Chemistry of HiortdahliteHide

Mindat Formula:

Na₂Ca₄(Ca_0.5Zr_0.5)Zr(Si₂O₇)2OF₃

Formula revised by IMA , Sept. 2020 (Proposal 20-D)

Element Weights:

Element	% weight
O	31.067 %
Ca	23.347 %
Zr	17.714 %
Si	14.543 %
F	7.378 %
Na	5.952 %

Calculated from ideal end-member formula.

Elements listed:

Ca, F, Na, O, Si, Zr - search for minerals with similar chemistry

Common Impurities:

OH,Hf,Sn,Al,Y,TR,Fe,Nb,U,Mn,Mg,Sr,K

Crystallography of HiortdahliteHide

Crystal System:

Triclinic

Class (H-M):

1 - Pinacoidal

Space Group:

Cell Parameters:

a = 10.9517 Å, b = 10.31 Å, c = 7.29 Å
α = 90.32°, β = 109.03°, γ = 95.08°

Ratio:

a:b:c = 1.062 : 1 : 0.707

Unit Cell V:

774.57 Å³ (Calculated from Unit Cell)

Twinning:

Polysynthetic twinning on {010} and {100}

Crystal StructureHide

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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)
0019478	Hiortdahlite	Biagioni C, Merlino S, Parodi G C, Perchiazzi N (2012) Crystal chemistry of minerals of the wohlerite group from the Los Archipelago, Guinea The Canadian Mineralogist 50 593-609	2012	the nepheline syenites of the Los Archipelago, Guinea	293
0019218	Hiortdahlite	Bellezza M, Merlino S, Perchiazzi N (2012) Distinct domains in "guarinite" from Monte Somma, Italy: Crystal structures and crystal chemistry The Canadian Mineralogist 50 531-548	2012	Monte Somma syenite, Italy	293
0019216	Hiortdahlite	Bellezza M, Merlino S, Perchiazzi N (2012) Distinct domains in "guarinite" from Monte Somma, Italy: Crystal structures and crystal chemistry The Canadian Mineralogist 50 531-548	2012	Monte Somma syenite, Italy	293
0017878	Hiortdahlite	Merlino S, Perchiazzi N (2010) The crystal structure of hiortdahlite II Mineralogy and Petrology 37 25-35	2010	Kipawa river, Canada	293
0014615	Hiortdahlite	Merlino S, Perchiazzi N (1987) The crystal structure of hiortdahlite II Mineralogy and Petrology 37 25-35	1987	Kipawa River, Canada	293
0015704	Hiortdahlite	Merlino S, Perchiazzi N (1985) The crystal structure of hiortdahlite I Tschermaks Mineralogische und Petrographische Mitteilungen 34 297-310	1985		293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Hiortdahlite'
loop_
_publ_author_name
'Biagioni C'
'Merlino S'
'Parodi G C'
'Perchiazzi N'
_journal_name_full 'The Canadian Mineralogist'
_journal_volume 50 
_journal_year 2012
_journal_page_first 593
_journal_page_last 609
_publ_section_title
;
 Crystal chemistry of minerals of the wohlerite group from the Los Archipelago, Guinea
;
_database_code_amcsd 0019478
_chemical_compound_source 'the nepheline syenites of the Los Archipelago, Guinea'
_chemical_formula_sum 'Ca4.71 Na1.62 (Zr.74 Ti.26) Mn.67 Si4 O15 F3'
_cell_length_a 10.934
_cell_length_b 10.991
_cell_length_c 7.366
_cell_angle_alpha 109.43
_cell_angle_beta 109.60
_cell_angle_gamma 83.56
_cell_volume 786.429
_exptl_crystal_density_diffrn      3.176
_symmetry_space_group_name_H-M 'P -1'
loop_
_space_group_symop_operation_xyz
  '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
Ca1   0.40370   0.30740   0.23230   1.00000   0.01770
Ca2   0.90260   0.19360   0.42330   1.00000   0.01340
Ca3   0.89900   0.19140   0.91890   1.00000   0.01050
Ca4   0.12840   0.42330   0.89450   0.84000   0.01280
Na4   0.12840   0.42330   0.89450   0.16000   0.01280
Zr   0.40303   0.29429   0.72160   0.74000   0.01040
Ti   0.40303   0.29429   0.72160   0.26000   0.01040
Mn   0.62720   0.06650   0.47860   0.67000   0.01810
CaM1   0.62720   0.06650   0.47860   0.33000   0.01810
Na   0.12300   0.42260   0.40070   1.00000   0.00990
NaCA   0.62440   0.07750   0.96780   0.46000   0.01780
CaNA   0.62440   0.07750   0.96780   0.54000   0.01780
Si1   0.33390   0.62150   0.82150   1.00000   0.01430
Si2   0.33080   0.62050   0.37720   1.00000   0.01550
Si3   0.18370   0.12700   0.24750   1.00000   0.01670
Si4   0.18640   0.12460   0.80970   1.00000   0.00960
O1   0.35820   0.62030   0.61230   1.00000   0.02900
O2   0.22070   0.14050   0.05400   1.00000   0.03300
O3   0.27130   0.48860   0.23030   1.00000   0.02400
O4   0.03510   0.15690   0.71600   1.00000   0.02200
O5   0.22970   0.73960   0.86840   1.00000   0.02100
O6   0.03410   0.15040   0.21900   1.00000   0.02900
O7   0.48480   0.11360   0.65930   1.00000   0.02300
O8   0.24460   0.74810   0.35990   1.00000   0.02500
O9   0.23610  -0.01680   0.70590   1.00000   0.02400
O10   0.27470   0.24300   0.84120   1.00000   0.02300
O11   0.52220   0.36140   0.60750   1.00000   0.02700
O12   0.28570   0.47610   0.77510   1.00000   0.02400
O13   0.26810   0.24370   0.42580   1.00000   0.02100
O14   0.24080  -0.01480   0.25850   1.00000   0.01900
O15   0.52450   0.33840   0.01840   1.00000   0.02700
F1  -0.00770   0.39080   0.05980   1.00000   0.02100
F2  -0.01130   0.39310   0.57220   1.00000   0.02100
F3   0.50350   0.11360   0.19300   1.00000   0.02900
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
Ca1 0.01520 0.01600 0.01820 0.00390 0.00650 0.00140
Ca2 0.01180 0.01220 0.01170 0.00100 0.00180 0.00040
Ca3 0.00970 0.01050 0.01050 -0.00320 0.00440 -0.00010
Ca4 0.01200 0.01200 0.01300 0.00360 0.00600 0.00180
Na4 0.01200 0.01200 0.01300 0.00360 0.00600 0.00180
Zr 0.00770 0.01220 0.01020 -0.00010 0.00170 0.00300
Ti 0.00770 0.01220 0.01020 -0.00010 0.00170 0.00300
Mn 0.02050 0.01520 0.01710 -0.00110 0.00550 0.00350
CaM1 0.02050 0.01520 0.01710 -0.00110 0.00550 0.00350
Na 0.00900 0.01000 0.00900 0.00200 0.00600 -0.00100
NaCA 0.01900 0.01500 0.01500 -0.00900 0.00400 -0.00200
CaNA 0.01900 0.01500 0.01500 -0.00900 0.00400 -0.00200
Si1 0.00900 0.01500 0.01800 -0.00040 0.00400 0.00520
Si2 0.01700 0.00900 0.01900 0.00070 0.00800 -0.00030
Si3 0.01800 0.01600 0.01300 -0.00140 0.00100 0.00300
Si4 0.00400 0.00600 0.01600 0.00140 0.00180 0.00210

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
3.28 Å	(45)
3.00 Å	(90)
2.87 Å	(100)
2.03 Å	(25)
1.84 Å	(30)
1.80 Å	(25)
1.70 Å	(40)

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

Synonyms of HiortdahliteHide

Hiortdahlite I

Other Language Names for HiortdahliteHide

Dutch:Hiortdahliet

German:Hiortdahlit

Russian:Йортдалит

Spanish:Hiortdahlita

Relationship of Hiortdahlite to other SpeciesHide

Member of:

Wöhlerite Group

Other Members of Wöhlerite Group:

Baghdadite	Ca₆Zr₂(Si₂O₇)₂O₄	Mon. 2/m : P2₁/b
Burpalite	Na₂CaZr(Si₂O₇)F₂	Mon. 2/m : P2₁/b
Cuspidine	Ca₈(Si₂O₇)₂F₄	Mon. 2/m : P2₁/b
Janhaugite	(Na,Ca)₃(Mn²⁺,Fe²⁺)₃(Ti,Zr,Nb)₂(Si₂O₇)₂O₂(OH,F)₂	Mon. 2/m : P2₁/m
Låvenite	Na₂Ca₂Mn₂Zr₂(Si₂O₇)₂O₂F₂	Mon. 2/m : P2₁/b
Madeiraite	Na₂Ca₂Fe₂Zr₂(Si₂O₇)₂O₂F₂	Mon. 2/m : P2₁/b
Moxuanxueite	NaCa₆Zr(Si₂O₇)₂OF₃	Tric. 1 : P1
Niocalite	(Ca,Nb)₄(Si₂O₇)(O,OH,F)₂	Mon. m
Normandite	NaCa(Mn,Fe)(Ti,Nb,Zr)(Si₂O₇)OF	Mon. 2/m : P2₁/b
Pilanesbergite	Na₂Ca₂Fe₂Ti₂(Si₂O₇)₂O₂F₂	Mon. 2/m : P2₁/b
Wöhlerite	Na₂Ca₄ZrNb(Si₂O₇)₂O₃F	Mon. 2 : P2₁

Common AssociatesHide

Associations Based on Photo Data:

5 photos of Hiortdahlite associated with Wöhlerite	Na₂Ca₄ZrNb(Si₂O₇)₂O₃F
4 photos of Hiortdahlite associated with Sanidine	K(AlSi₃O₈)
3 photos of Hiortdahlite associated with Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
3 photos of Hiortdahlite associated with Albite	Na(AlSi₃O₈)
2 photos of Hiortdahlite associated with Aegirine	NaFe³⁺Si₂O₆
2 photos of Hiortdahlite associated with Thorianite	ThO₂
2 photos of Hiortdahlite associated with Microcline	K(AlSi₃O₈)
1 photo of Hiortdahlite associated with Fluorapatite	Ca₅(PO₄)₃F

Related Minerals - Strunz-mindat Grouping Hide

9.BE.	Zinkgruvanite	Ba₄Mn²⁺₄Fe³⁺₂(Si₂O₇)₂(SO₄)₂O₂(OH)₂	Tric. 1 : P1
9.BE.	Calciomurmanite	(Na,◻)₂Ca(Ti,Mg,Nb)₄[Si₂O₇]₂O₂(OH,O)₂(H₂O)₄	Tric. 1 : P1
9.BE.	Cámaraite	Ba₃Na(Fe²⁺,Mn)₈Ti₄(Si₂O₇)₄O₄(OH,F)₇	Tric. 1
9.BE.	Alfredcasparite	Sr₂TiO(Si₂O₇)	Tet. 4mm : P4bm
9.BE.	Batievaite-(Y)	Y₂Ca₂Ti(Si₂O₇)₂(OH)₂(H₂O)₄	Tric. 1 : P1
9.BE.	Nacareniobsite-(Y)	Na₃Ca₃YNb(Si₂O₇)₂OF₃	Mon. 2/m : P2₁/b
9.BE.	Alexkuznetsovite-(Ce)	Ce₂Mn(CO₃)(Si₂O₇)	Mon. 2/m : P2₁/b
9.BE.	Bobshannonite	Na₂KBa(Mn,Na)₈(Nb,Ti)₄(Si₂O₇)₄O₄(OH)₄(O,F)₂	Tric.
9.BE.	Paralomonosovite	Na₆◻₄Ti₄(Si₂O₇)₂[PO₃OH][PO₂(OH)₂]O₂(OF)	Tric. 1 : P1
9.BE.	Madeiraite	Na₂Ca₂Fe₂Zr₂(Si₂O₇)₂O₂F₂	Mon. 2/m : P2₁/b
9.BE.	Bortolanite	Ca₂(Ca_1.5Zr_0.5)Na(NaCa)Ti(Si₂O₇)₂(OF)F₂	Tric. 1 : P1
9.BE.	Longshoushanite-(Ce)	Ce₄MgAl₂Ti₂(Si₂O₇)₂O₈	Mon. 2/m : P2₁/b
9.BE.	Moxuanxueite	NaCa₆Zr(Si₂O₇)₂OF₃	Tric. 1 : P1
9.BE.	Delhuyarite-(Ce)	Ce₄Mg(Fe³⁺,W)₃◻(Si₂O₇)₂O₆(OH)₂	Mon. 2/m : B2/m
9.BE.	Christofschäferite-(Ce)	Ce₃CaMnTiFe³⁺Ti₂(Si₂O₇)₂O₈	Mon. 2/m : P2₁/m
9.BE.X	Asimowite	Fe²⁺₄O(Si₂O₇)	Orth. mmm(2/m2/m2/m) : Imma
9.BE.	Biraite-(La)	La₂Fe²⁺(CO₃)(Si₂O₇)	Mon. 2/m : P2₁/b
9.BE.	Pilanesbergite	Na₂Ca₂Fe₂Ti₂(Si₂O₇)₂O₂F₂	Mon. 2/m : P2₁/b
9.BE.02	Wadsleyite	Mg₄O(Si₂O₇)	Orth. mmm(2/m2/m2/m) : Imma
9.BE.02	Ohtaniite	Mg₃(Si_0.5◻_0.5)Si₂O₈	Orth. mmm(2/m2/m2/m) : Imma
9.BE.05	Lawsonite	CaAl₂(Si₂O₇)(OH)₂ · H₂O	Orth. mmm(2/m2/m2/m) : Cmcm
9.BE.05	Hennomartinite	SrMn³⁺₂(Si₂O₇)(OH)₂ · H₂O	Orth. mmm(2/m2/m2/m) : Cmcm
9.BE.05	Cortesognoite	CaV₂(Si₂O₇)(OH)₂ · H₂O	Orth. mmm(2/m2/m2/m) : Cmcm
9.BE.05	Noelbensonite	BaMn³⁺₂(Si₂O₇)(OH)₂ · H₂O	Orth. mm2
9.BE.05	Itoigawaite	SrAl₂(Si₂O₇)(OH)₂ · H₂O	Orth. mmm(2/m2/m2/m) : Cmcm
9.BE.07	Ilvaite	CaFe³⁺Fe²⁺₂(Si₂O₇)O(OH)	Orth. mmm(2/m2/m2/m)
9.BE.07	Amamoorite	CaMn²⁺₂Mn³⁺(Si₂O₇)O(OH)	Mon. 2/m : P2₁/b
9.BE.07	Manganilvaite	CaFe²⁺Fe³⁺Mn²⁺(Si₂O₇)O(OH)	Mon. 2/m : P2₁/b
9.BE.10	Suolunite	Ca₂(H₂Si₂O₇) · H₂O	Orth. mm2 : Fdd2
9.BE.12	Jaffeite	Ca₆(Si₂O₇)(OH)₆	Trig. 3 : P3
9.BE.15	Fresnoite	Ba₂Ti(Si₂O₇)O	Tet. 4mm : P4bm
9.BE.17	Janhaugite	(Na,Ca)₃(Mn²⁺,Fe²⁺)₃(Ti,Zr,Nb)₂(Si₂O₇)₂O₂(OH,F)₂	Mon. 2/m : P2₁/m
9.BE.17	Burpalite	Na₂CaZr(Si₂O₇)F₂	Mon. 2/m : P2₁/b
9.BE.17	Niocalite	(Ca,Nb)₄(Si₂O₇)(O,OH,F)₂	Mon. m
9.BE.17	Normandite	NaCa(Mn,Fe)(Ti,Nb,Zr)(Si₂O₇)OF	Mon. 2/m : P2₁/b
9.BE.17	Låvenite	Na₂Ca₂Mn₂Zr₂(Si₂O₇)₂O₂F₂	Mon. 2/m : P2₁/b
9.BE.17	Cuspidine	Ca₈(Si₂O₇)₂F₄	Mon. 2/m : P2₁/b
9.BE.17	Wöhlerite	Na₂Ca₄ZrNb(Si₂O₇)₂O₃F	Mon. 2 : P2₁
9.BE.17	Baghdadite	Ca₆Zr₂(Si₂O₇)₂O₄	Mon. 2/m : P2₁/b
9.BE.20	Nacareniobsite-(Ce)	Na₃Ca₃(Ce,REE)Nb(Si₂O₇)₂OF₃	Mon. 2/m : P2₁/b
9.BE.20	Roumaite	(Ca,Na,REE,◻)₇(Nb,Ti)[Si₂O₇]₂OF₃	Mon. m : Bb
9.BE.20	Rinkite-(Ce)	(Ca₃Ce)Na(NaCa)Ti(Si₂O₇)₂(OF)F₂	Mon. 2/m : P2₁/b
9.BE.20	Nacareniobsite-(Nd)	Ca₂(CaNd)Na₃Nb(Si₂O₇)₂(OF)F₂	Mon. 2/m : P2₁/b
9.BE.20	Rinkite-(Y)	Na₂Ca₄YTi(Si₂O₇)₂OF₃	Mon. 2/m : P2₁/b
9.BE.20	Mosandrite-(Ce)	(Ca₃REE)[(H₂O)₂Ca_0.5◻_0.5]Ti(Si₂O₇)₂(OH)₂(H₂O)₂	Mon. 2/m : P2₁/b
9.BE.22	Hainite-(Y)	Na₂Ca₄(Y,REE)Ti(Si₂O₇)₂OF₃	Tric. 1 : P1
9.BE.22	Rosenbuschite	Na₆Ca₆Zr₃Ti(Si₂O₇)₄O₂F₆	Tric. 1 : P1
9.BE.22	Götzenite	NaCa₆Ti(Si₂O₇)₂OF₃	Tric. 1 : P1
9.BE.22	Fogoite-(Y)	Na₃Ca₂Y₂Ti(Si₂O₇)₂OF₃	Tric. 1 : P1
9.BE.22	Kochite	Na₃Ca₂MnZrTi(Si₂O₇)₂OF₃	Tric. 1 : P1
9.BE.23	Dovyrenite	Ca₆Zr(Si₂O₇)₂(OH)₄	Orth. mmm(2/m2/m2/m) : Pnnm
9.BE.25	Lamprophyllite	(Na,Mn²⁺)₃(Sr,Na)₂(Ti,Fe³⁺)₃(Si₂O₇)₂O₂(OH,O,F)₂	Mon. 2/m
9.BE.25	Seidozerite	Na₄MnZr₂Ti(Si₂O₇)₂O₂F₂	Mon. 2/m : P2/b
9.BE.25	Nabalamprophyllite	(BaNa)Ti₂Na₃Ti(Si₂O₇)₂O₂(OH)₂	Mon. 2/m : P2/m
9.BE.25	Schüllerite	Ba₂Na(Mn,Ca)(Fe³⁺,Mg,Fe²⁺)₂Ti₂(Si₂O₇)₂(O,F)₄	Tric. 1 : P1
9.BE.25	Ericssonite	BaMn²⁺₂Fe³⁺(Si₂O₇)O(OH)	Mon. 2/m : B2/m
9.BE.25	Grenmarite	Na₄MnZr₃(Si₂O₇)₂O₂F₂	Mon. 2/m : P2/b
9.BE.25	Kazanskyite	BaNa₃Ti₂Nb(Si₂O₇)₂O₂(OH)₂(H₂O)₄	Tric. 1 : P1
9.BE.25	Saamite	Ba◻Na₃Ti₂Nb(Si₂O₇)₂O₂(OH)F(H₂O)₂	Tric. 1 : P1
9.BE.25	Emmerichite	Ba₂Na(Na,Fe²⁺)₂(Fe³⁺,Mg)Ti₂(Si₂O₇)₂O₂F₂	Mon. 2/m : B2/m
9.BE.25	Barytolamprophyllite	(Ba,Na)₂(Na,Ti,Fe³⁺)₄Ti₂(Si₂O₇)₂O(OH,F)	Mon.
9.BE.25	'Ericssonite-2O'	BaMn²⁺₂Fe³⁺(Si₂O₇)O(OH)	Orth.
9.BE.25	Fluorbarytolamprophyllite	(Ba,Sr)₂[(Na,Fe²⁺)₃(Ti,Mg)F₂][Ti₂(Si₂O₇)₂O₂]	Mon. 2/m : B2/m
9.BE.25	Fluorlamprophyllite	Na₃(SrNa)Ti₃(Si₂O₇)₂O₂F₂	Mon. 2/m : B2/m
9.BE.25	Lileyite	Ba₂(Na,Fe,Ca)₃MgTi₂(Si₂O₇)₂O₂F₂	Mon. 2/m : B2/m
9.BE.27	Kolskyite	CaNa₂Ti₄(Si₂O₇)₂O₄(H₂O)₇	Tric. 1 : P1
9.BE.27	Vigrishinite	NaZnTi₄(Si₂O₇)₂O₃(OH)(H₂O)₄	Tric. 1 : P1
9.BE.27	Selivanovaite	NaFe³⁺Ti₄(Si₂O₇)₂O₄(H₂O)₄	Tric. 1 : P1
9.BE.27	Murmanite	Na₂Ti₂(Si₂O₇)O₂ · 2H₂O	Tric. 1 : P1
9.BE.30	Epistolite	(Na◻)Nb₂Na₃Ti(Si₂O₇)₂O₂(OH)₂(H₂O)₄	Tric. 1 : P1
9.BE.32	Lomonosovite	Na₅Ti₂(Si₂O₇)(PO₄)O₂	Tric. 1 : P1
9.BE.35	Vuonnemite	Na₁₁Ti⁴⁺Nb₂(Si₂O₇)₂(PO₄)₂O₃(F,OH)	Tric.
9.BE.37	Sobolevite	Na₁₃Ca₂Mn₂Ti₃(Si₂O₇)₂(PO₄)₄O₃F₃	Mon. m : Pb
9.BE.40	Ferroinnelite	Ba₄Ti₂Na(NaFe²⁺)Ti(Si₂O₇)₂[(SO₄)(PO₄)]O₂[O(OH)]	Tric. 1 : P1
9.BE.40	Phosphoinnelite	Na₃Ba₄Ti₃(Si₂O₇)₂(PO₄,SO₄)₂O₂F	Tric.
9.BE.40	Innelite	Ba₄Ti₂Na(NaMn²⁺)Ti(Si₂O₇)₂[(SO₄)(PO₄)]O₂[O(OH)]	Tric. 1 : P1
9.BE.42	Yoshimuraite	Ba₂Mn₂Ti(Si₂O₇)(PO₄)O(OH)	Tric. 1 : P1
9.BE.42	Horiite	Ba₂Mn₂Mn₄Ti₂(Si₂O₇)₂(PO₄)₂O₂(OH)₂	Tric. 1 : P1
9.BE.45	Quadruphite	Na₆Na₂(CaNa)₂Na₂Ti₂Na₂Ti₂(Si₂O₇)₂(PO₄)₄O₄F₂	Tric. 1 : P1
9.BE.47	Polyphite	Na₅(Na₄Ca₂)Ti₂(Si₂O₇)(PO₄)₃O₂F₂	Tric. 1 : P1
9.BE.50	Shkatulkalite	Na₂Nb₂Na₃Ti(Si₂O₇)₂O₂(FO)(H₂O)₄(H₂O)₃	Tric. 1 : P1
9.BE.50	Bornemanite	Na₆BaTi₂Nb(Si₂O₇)₂(PO₄)O₂(OH)F	Tric. 1 : P1
9.BE.55	Hejtmanite	Ba₂Mn²⁺₄Ti₂(Si₂O₇)₂O₂(OH)₂F₂	Tric. 1
9.BE.55	Bykovaite	(Ba,Na,K)₂(Na,Ti,Mn)₄(Ti,Nb)₂(Si₂O₇)₂O₂(H₂O,F,OH)₂ · 3.5H₂O	Mon. 2/m
9.BE.55	Nechelyustovite	(Ba,Sr,K)₂(Na,Ti,Mn)₄(Ti,Nb)₂(Si₂O₇)₂O₂(O,H₂O,F)₂ · 4.5H₂O	Mon. 2/m : B2/m
9.BE.55	Bafertisite	Ba₂Fe²⁺₄Ti₂(Si₂O₇)₂O₂(OH)₂F₂	Tric.
9.BE.60	Delindeite	(Na,K)₂(Ba,Ca)₂(Ti,Fe,Al)₃(Si₂O₇)₂O₂(OH)₂ · 2H₂O	Mon. 2/m : B2/m
9.BE.62	'Orthochevkinite'	(Ce,La,Ca,Na,Th)₄(Fe²⁺,Mg)₂(Ti,Fe³⁺)₃Si₄O₂₂	Orth.
9.BE.62 va	'Strontium Perrierite'	(Ce,Sr,La,Ca)₄Fe²⁺(Ti,Zr,Fe)₂Ti₂(Si₂O₇)₂O₈
9.BE.62	'Chevkinite-(Nd)'	(Nd,REE)₄(Fe²⁺,Mg)(Fe²⁺,Ti,Fe³⁺)₂(Ti,Fe³⁺)₂(Si₂O₇)₂O₈ ?
9.BE.62	'Perrierite-(Nd)'	Nd₄MgFe³⁺₂Ti₂(Si₂O₇)₂O₈ ?
9.BE.65	Bussenite	Na₂Ba₂Fe²⁺Ti(Si₂O₇)(CO₃)(OH)₃F	Tric. 1 : P1
9.BE.67	Jinshajiangite	BaNaFe²⁺₄Ti₂(Si₂O₇)₂O₂(OH)₂F	Tric. 1 : P1
9.BE.67	Perraultite	BaNaMn²⁺₄Ti₂(Si₂O₇)₂O₂(OH)₂F	Tric. 1
9.BE.70	Dingdaohengite-(Ce)	(Ce,La)₄Fe²⁺(Ti,Fe²⁺,Mg,Fe³⁺)₂Ti₂(Si₂O₇)₂O₈	Mon. 2/m : P2₁/b
9.BE.70	Perrierite-(Ce)	Ce₄MgFe³⁺₂Ti₂(Si₂O₇)₂O₈	Mon. 2/m : P2₁/b
9.BE.70	Karnasurtite-(Ce)	(Ce,La,Th)(Ti,Nb)(Al,Fe)(Si₂O₇)(OH)₄ · 3H₂O	Amor.
9.BE.70	Maoniupingite-(Ce)	(Ce,Ca)₄(Fe³⁺,Ti,Fe²⁺,◻)(Ti,Fe³⁺,Fe²⁺,Nb)₄(Si₂O₇)₂O₈	Mon. 2/m : B2/m
9.BE.70	Matsubaraite	Sr₄Ti₅(Si₂O₇)₂O₈	Mon. 2/m : P2₁/b
9.BE.70	Rengeite	Sr₄ZrTi₄(Si₂O₇)₂O₈	Mon. 2/m : P2₁/b
9.BE.70	Polyakovite-(Ce)	(Ce,Ca)₄(Mg,Fe²⁺)(Cr³⁺,Fe³⁺)₂(Ti,Nb)₂(Si₂O₇)₂O₈	Mon. 2/m : B2/m
9.BE.70	Hezuolinite	(Sr,REE)₄Zr(Ti,Fe³⁺)₄(Si₂O₇)₂O₈	Mon. 2/m : B2/m
9.BE.70	'UM2008-53-SiO:SrTiZr'	Sr₄ZrTi₄(Si₂O₇)₂O₈	Orth. mmm(2/m2/m2/m) : Pbca
9.BE.70	Chevkinite-(Ce)	Ce₄(Ti,Fe²⁺,Fe³⁺)₅O₈(Si₂O₇)₂	Mon. 2/m : P2₁/b
9.BE.70	Perrierite-(La)	(La,Ce,Ca)₄(Fe²⁺,Mn)(Ti,Fe³⁺,Al)₄[(Si₂O₇)O₄]₂	Mon. 2/m : P2₁/b
9.BE.70	Strontiochevkinite	(Sr,La,Ce,Ca)₄Fe²⁺(Ti,Zr)₂Ti₂(Si₂O₇)₂O₈	Mon. 2/m : P2₁/b
9.BE.72	Fersmanite	Ca₄(Na,Ca)₄(Ti,Nb)₄(Si₂O₇)₂O₈F₃	Tric.
9.BE.75	Belkovite	Ba₃(Nb,Ti)₆(Si₂O₇)₂O₁₂	Hex. 6m2 : P62m
9.BE.77	Nasonite	Pb₆Ca₄(Si₂O₇)₃Cl₂	Hex. 6/m : P6₃/m
9.BE.80	Melanotekite	Pb₂Fe³⁺₂(Si₂O₇)O₂	Orth. 222 : C222₁
9.BE.80	Kentrolite	Pb₂Mn³⁺₂(Si₂O₇)O₂	Orth. mmm(2/m2/m2/m) : Pbcm
9.BE.82	Alexkuznetsovite-(La)	La₂Mn(CO₃)(Si₂O₇)	Mon. 2/m : P2₁/b
9.BE.82	Tilleyite	Ca₅(Si₂O₇)(CO₃)₂	Mon. 2/m : P2₁/b
9.BE.85	Killalaite	Ca_6.4(H_0.6Si₂O₇)₂(OH)₂	Mon. 2/m : P2₁/m
9.BE.87	Stavelotite-(La)	(La,Nd,Ca)₃Mn²⁺₃Cu(Mn³⁺,Fe³⁺,Mn⁴⁺)₂₆(Si₂O₇)₆O₃₀	Trig. 3 : P3₁
9.BE.90	Magnesiorowlandite-(Y)	Y₄(Mg,Fe)(Si₂O₇)₂F₂	Tric. 1 : P1
9.BE.90	Biraite-(Ce)	Ce₂Fe²⁺(Si₂O₇)(CO₃)	Mon. 2/m : P2₁/b
9.BE.92	Cervandonite-(Ce)	(Ce,Nd,La)(Fe³⁺,Fe²⁺,Ti,Al)₃O₂(Si₂O₇)(As³⁺O₃)(OH)	Trig. 3m : R3m
9.BE.92	Chirvinskyite	(Na,Ca)₁₃(Fe,Mn,◻)₂(Ti,Zr)₅(Si₂O₇)₄(OH,O)₁₂ · 2H₂O	Tric. 1 : P1
9.BE.95	Rusinovite	Ca₁₀(Si₂O₇)₃Cl₂	Orth. mmm(2/m2/m2/m) : Cmcm
9.BE.95	Batisivite	BaV³⁺₈Ti₆(Si₂O₇)O₂₂	Tric. 1 : P1
9.BE.97	Schlüterite-(Y)	(Y,REE)₂AlSi₂O₇(OH)₂F	Mon. 2/m : P2₁/b

Other InformationHide

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Internet Links for HiortdahliteHide

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References for HiortdahliteHide

Reference List:

Brøgger, Waldemar Christofer (1890) Die Mineralien der Syenitpegmatitgänge der südnorwegischen Augit- und Nephelinsyenite. Zeitschrift für Krystallographie und Mineralogie, 16 (1). 1-893pp.367-377

Zambonini, F., Prior, G. T. (1909) On the identity of Guarinite and Hiortdahlite. Mineralogical Magazine and Journal of the Mineralogical Society, 15 (70) 247-259 doi:10.1180/minmag.1909.015.70.09

Aarden, H. M., Gittins, J. (1974) Hiortdahlite from Kipawa River, Villedieu Township Temiscaming County, Québec, Canada. The Canadian Mineralogist, 12 (4) 241-247

Eggleton, R. A., Halford, G. E., Beams, S. D. (1979) Hiortdahlite from Jingera, New South Wales. Journal of the Geological Society of Australia, 26 (1) 81-85 doi:10.1080/00167617908729069

Merlino, S., Perchiazzi, N. (1985) The crystal structure of hiortdahlite I. TMPM Tschermaks Mineralogische und Petrographische Mitteilungen, 34 (3). 297-310 doi:10.1007/bf01082969

Merlino, S., Perchiazzi, N. (1987) The crystal structure of Hiortdahlite II. Mineralogy and Petrology, 37 (1) 25-35 doi:10.1007/bf01163156

Merlino S., Perchiazzi N. (1988): Modular mineralogy in the cuspidine group of minerals. The Canadian Mineralogist: 26: 933-943.

(2001) Hiortdahlite. Handbook of Mineralogy. Mineralogical Society of America

Bellezza, M., Merlino, S., Perchiazzi, N. (2012) Distinct domains in "guarinite" from Monte Somma, Italy: Crystal structures and crystal chemistry. The Canadian Mineralogist, 50 (2). 531-548 doi:10.3749/canmin.50.2.531

Biagioni, C., Merlino, S., Parodi, G. C., Perchiazzi, N. (2012) Crystal chemistry of minerals of the wöhlerite group from the Los Archipelago, Guinea. The Canadian Mineralogist, 50 (3) 593-609 doi:10.3749/canmin.50.3.593

Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2020) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 57. European Journal of Mineralogy, 32 (5) 495-499 doi:10.5194/ejm-32-495-2020

Dal Bo, Fabrice, Friis, Henrik, Mills, Stuart J. (2022) Nomenclature of wöhlerite-group minerals. Mineralogical Magazine, 86 (4) 661-676 doi:10.1180/mgm.2022.10

Localities for HiortdahliteHide

Showing 55 localities.

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- 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.


Australia
New South Wales Auckland Co. Egan Peaks Nature Reserve ⓘ Jingera Complex	Eggleton +3 other references

Brazil
Minas Gerais ⓘ Poços de Caldas alkaline complex	Gomes et al. (2023)
Rio de Janeiro Itatiaia ⓘ Itatiaia alkaline complex	- (2016) +6 other references
São Paulo São Sebastião ⓘ Montão de Trigo island	Rojas et al. (2016)

Canada
Québec Abitibi-Témiscamingue Témiscamingue RCM Les Lacs-du-Témiscamingue ⓘ Kipawa alkaline complex	Aarden et al. (1974) +1 other reference
ⓘ Hiortdahlite locality	Aarden et al. (1974)
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)
ⓘ Strange Lake Alkalic Complex (Strange Lake Complex; Lac Brisson Complex)	Miller (1990) +4 other references

China
Yunnan Honghe Jianshui County Puxiong ⓘ Puxiong regolith-hosted REE deposit	Wang et al. (2024)

Germany
Rhineland-Palatinate Mayen-Koblenz Mendig Mendig ⓘ In den Dellen quarries	Hentschel (1986)
ⓘ Thelenberg	Hentschel (1986)
Wingertsberg ⓘ Pumice quarries	Hentschel (1986)
Pellenz Kruft ⓘ Krufter Ofen	Hentschel (1986)

Greenland
Kujalleq ⓘ Ilímaussaq complex	Petersen (2001)
Sermersooq Kangerlussuaq Fjord Amdrup Firth ⓘ Kentbrooksite occurrence	Perchiazzi et al. (2000)

Guinea
Conakry Region ⓘ Los Archipelago (Los Islands)	Lacroix (1924) +1 other reference
ⓘ Rouma Island

Italy
Campania Metropolitan City of Naples Ercolano San Vito ⓘ San Vito Quarry	Russo et al. (2004)
ⓘ Ischia Island	Melluso et al. (2014)
ⓘ Mount Somma	[Lapis 1994:5 p.13-23
Sicily Metropolitan City of Catania Biancavilla ⓘ Mt Calvario ?	Di Franco (1942)
Umbria Terni Province San Venanzo ⓘ Vispi Quarry	Sharygin et al. (1996) +1 other reference

Mexico
Coahuila Ocampo Municipality ⓘ Sierra La Vasca alkaline complex	Mitchell et al. (2025)

Mongolia
Khövsgöl Province Alag-Erdene District ⓘ Barun Mankhan massif	Anatoly Nikiforov analytical data

Morocco
Drâa-Tafilalet Region Midelt Province Midelt Cercle Aït Oufella Caïdat Amersid ⓘ Jebel Bou-Agrao	Roda Robles et al. (2001)

Namibia
Erongo Region Dâures Constituency Brandberg Area Messum Igneous Complex ⓘ Messum Crater	Blancher (2008)

Norway
Telemark Porsgrunn Auenlandet Sagåsen ⓘ Saga 1 Quarry	Torfinn Kjærnet collection
ⓘ Sagåsen Quarry	Peter Andresen collection.
ⓘ Bjørkøya	Larsen et al. (2010)
ⓘ Ferry Quay	Larsen et al. (2010)
Risøya ⓘ Risøya South	Ragnar Hansen collection/observation ...
ⓘ Risøya Southwest	Neumann (1985) +1 other reference
ⓘ Siktesøya	Larsen et al. (2010)
ⓘ Trompetholmen	Larsen et al. (2010) +1 other reference
Skien ⓘ Ørntjern	Neumann (1985)
Vestfold Larvik Commune Arøyskjærene (Arøy skerries) ⓘ Arøyskjærene North	Andersen et al. (2010)
ⓘ Langodden	Brøgger (1890) +2 other references
Barkevik area ⓘ Barkevika	Neumann (1985)
ⓘ Skutesundskjær	Larsen et al. (2010) +1 other reference
ⓘ Teineholmen ?	Peter Andresen collection
ⓘ Nordholmen	Larsen et al. (2010)
ⓘ Stokkøya	Larsen et al. (2010)
ⓘ Dalheim	- (n.d.)
ⓘ Hvitesand	Larsen et al. (2010)
ⓘ Stokksund	U. Kolitsch (unpublished structure refinements) +2 other references
ⓘ Kuholmen	Larsen et al. (2010)
ⓘ Store Arøya (Arøy)	Larsen et al. (2010)
ⓘ Near Prammen	Larsen et al. (2010)
Tvedalen ⓘ Blåbærmyr Quarry
ⓘ Johs Nilsens Quarry	Peter Andresen collection
ⓘ Tuften	MAC depository of Unpublished Data et al. (Piilonen et al 2013)
ⓘ A/S Granit Quarry	Peter Andresen collection

Romania
Harghita County ⓘ Ditrău Complex	Hirtopanu (2006)

Russia
Tuva Sangilen Upland ⓘ Korgeredaba alkaline massif	Kapustin et al. (1965)

Sweden
Jönköping County Jönköping Gränna ⓘ Norra Kärr ?	Adamson (1944) +1 other reference

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Hiortdahlite

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