Hiortdahlite Mineral Data + 
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- 56.2.4.1 Baghdadite Ca3(Zr,Ti)Si2O9 P 21/a 2/m
- 56.2.4.2 Burpalite Na2CaZrSi2O7F2 P 21/a 2/m
- 56.2.4.3 Cuspidine Ca4Si2O7(F,OH)2 P 21/c 2/m
- 56.2.4.4 Lavenite (Na,Ca)2(Mn,Fe)(Zr,Ti,Nb)Si2O7(O,OH,F) P 21/a 2/m
- 56.2.4.5 Wohlerite NaCa2(Zr,Nb)Si2O7(O,OH,F)2 P 21/m 2/m
- 56.2.4.6 Niocalite Ca14Nb2(Si2O7)4O6F2 Pa m
- 56.2.4.7 Hiortdahlite (Ca,Na,Y)3(Zr,Ti)Si2O7(F,O,OH)2 P1 1
- 56.2.4.8 Rosenbuschite (Ca,Na)3(Zr,Ti)Si2O8F P1 1
- 56.2.4.9 Hainite Na4Ca8(Ti,Zr,Mn,Fe)3Si8O28F8 P1 1
- 56.2.4.10 Janhaugite (Na,Ca)3(Mn,Fe)3(Ti,Zr,Nb)2Si4O15(OH,F,O)3 P 21/n 2/m
- 56.2.4.11 Jennite Ca9Si6O18(OH)6·8H2O P1 1
- 56.2.4.12 Komarovite (Ca,Mn)2(Nb,Ti)2Si2O7(O,F)2·3.5(H2O) Unk Ortho
- 56.2.4.13 Na-komarovite? Na6CaNb6[Si4O12F2·4(H2O) C mmm 2/m 2/m 2/m
- 56.2.4.14 Suolunite Ca2Si2O5(OH)2·(H2O) F dd2 mm2
- 56.2.4.15 Mongolite Ca4Nb6Si5O24(OH)10·5(H2O) Unk Tetra
- 56.2.4.16 Kristiansenite! Ca2ScSn(Si2O7)(Si2O6OH) C1 1
- 56.2.4.17 Kochite! Na2(Na,Ca)4Ca4(Mn,Ca)2Zr2Ti2(Si2O7)4(O,F)4F4 P1 1
- VIII/C.11-05 Cuspidine Ca4Si2O7(F,OH)2 P 21/c 2/m
- VIII/C.11-10 Wohlerite NaCa2(Zr,Nb)Si2O7(O,OH,F)2 P 21/m 2/m
- VIII/C.11-12 Janhaugite (Na,Ca)3(Mn,Fe)3(Ti,Zr,Nb)2Si4O15(OH,F,O)3 P 21/n 2/m
- VIII/C.11-15 Normandite! NaCa(Mn,Fe)(Ti,Nb,Zr)Si2O7(O,F)2 P 21/a 2/m
- VIII/C.11-20 Lavenite (Na,Ca)2(Mn,Fe)(Zr,Ti,Nb)Si2O7(O,OH,F) P 21/a 2/m
- VIII/C.11-25 Burpalite Na2CaZrSi2O7F2 P 21/a 2/m
- VIII/C.11-30 Baghdadite Ca3(Zr,Ti)Si2O9 P 21/a 2/m
- VIII/C.11-40 Niocalite Ca14Nb2(Si2O7)4O6F2 Pa m
- VIII/C.11-50 Hiortdahlite (Ca,Na,Y)3(Zr,Ti)Si2O7(F,O,OH)2 P1 1
General Hiortdahlite Information |
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 Chemical Formula: |
(Ca,Na,Y)3(Zr,Ti)Si2O7(F,O,OH)2 | ||
| Composition: |
Molecular Weight = 371.93 gm | ||
| Sodium 5.56 % Na 7.50 % Na2O | |||
| Calcium 21.55 % Ca 30.16 % CaO | |||
| Yttrium 2.39 % Y 3.04 % Y2O3 | |||
| Zirconium 14.72 % Zr 19.88 % ZrO2 | |||
| Titanium 1.29 % Ti 2.15 % TiO2 | |||
| Silicon 15.10 % Si 32.31 % SiO2 | |||
| Hydrogen 0.05 % H 0.48 % H2O | |||
| Oxygen 32.69 % O | |||
| Fluorine 6.64 % F 6.64 % F | |||
| - % F -2.80 % -O=F2 | |||
| ______ ______ | |||
| 100.00 % 99.35 % = TOTAL OXIDE | |||
| Empirical Formula: |
Ca2Na0.9Y0.1Zr0.6Ti0.1(Si2O7)F1.3O0.4(OH)0.2 | ||
| Environment: |
Rare mineral in alkalic rocks, their pegmatites and metamorphosed equivalents and miarolitic cavities in sanidinites. | ||
| IMA Status: |
Valid Species (Pre-IMA) 1889 | ||
| Locality: |
Mittel Aro, Lille Aro, and Stokko Islands, Norway. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for prof. Thorstein Hallager Hiortdahl (1839-1925), Mineralogist of Christiania (now Olso), Norway. | ||
Hiortdahlite Image | |||
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Images:
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Hiortdahlite Crystallography |
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| Axial Ratios: |
a:b:c =1.0601:1:0.7109 | ||
| Cell Dimensions: |
a = 10.93, b = 10.31, c = 7.33, Z = 4; alpha = 90.32°, beta = 109.03°, gamma = 90.08° V = 780.85 Den(Calc)= 3.16 | ||
| Crystal System: |
Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1 | ||
| X Ray Diffraction: |
By Intensity(I/Io): 2.87(1), 3(0.9), 3.28(0.45), | ||
Physical Properties of Hiortdahlite |
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| Cleavage: |
[110] Distinct, [110] Distinct | ||
| Color: |
Brown, Colorless, Yellow brown, Honey yellow, Light yellow. | ||
| Density: |
3.267 | ||
| Diaphaniety: |
Transparent to Translucent | ||
| Fracture: |
Brittle - Generally displayed by glasses and most non-metallic minerals. | ||
| Habit: |
Tabular - Form dimensions are thin in one direction. | ||
| Hardness: |
5.5 - Knife Blade | ||
| Luster: |
Vitreous - Greasy | ||
| Streak: |
white | ||
Optical Properties of Hiortdahlite |
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| Gladstone-Dale: |
CI meas= 0.025 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= -0.008 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2068,KPDmeas= 0.2,KC= 0.2051 |
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| Optical Data: |
Biaxial (+), a=1.639-1.658, b=1.643-1.664, g=1.646-1.671, bire=0.0070-0.0130, 2V(Calc)=80-86, 2V(Meas)=80. Dispersion r < v strong. | ||
| Pleochroism (x): |
nearly colorless. | ||
| Pleochroism (y): |
bright yellow. | ||
| Pleochroism (z): |
wine yellow. | ||
Calculated Properties of Hiortdahlite |
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| Electron Density: |
relectron=3.07 gm/cc |
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| Fermion Index |
Fermion Index = 0.02567 Boson Index = 0.97433 |
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| Photoelectric: |
PEHiortdahlite = 25.99 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Hiortdahlite is Not Radioactive |
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Hiortdahlite Classification |
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| Dana Class: |
56.2.4.7 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O | ||
| (56.2)with cations in [4] and/or >[4] coordination | |||
| (56.2.4)Cuspidine - Wohlerite group | |||
| Strunz Class: |
VIII/C.11-50 VIII - Silicates | ||
| VIII/C - Sorosilicates with [Si2O7]6-, with anions unfamiliar to tetraheders [O,OH,F] | |||
| VIII/C.11 - Wöhlerite - Lavenite series | |||
Other Hiortdahlite Information |
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| References: |
NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic2) | ||
| See Also: |
Links to other databases for Hiortdahlite : 1 - Alkali-Nuts(English) 2 - Alkali-Nuts(Francais) 3 -Am. Min. Crystal Structure Database 4 -Athena 5 - EUROmin Project 6 -Google Images 7 -Google Scholar 8 -Handbook of Mineralogy (MinSocAm) 9 -Handbook of Mineralogy (UofA) 10 -MinDAT 11 -MinMax(Deutsch) 12 -MinMax(English) 13 -Mineralienatlas (Deutsch) 14 -QUT Mineral Atlas 15 - WWW-MINCRYST 16 -École des Mines de Paris Search for Hiortdahlite using: Visit our Advertisers for Hiortdahlite : Translate Hiortdahlite Mineral Data : Ask about Hiortdahlite here : Print or Cut-and-Paste your Hiortdahlite Specimen Label here :
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