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Hiortdahlite Mineral Data
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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 |
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Sodium 5.56 % Na 7.50 % Na2O |
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Calcium 21.55 % Ca 30.16 % CaO |
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Yttrium 2.39 % Y 3.04 % Y2O3 |
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Zirconium 14.72 % Zr 19.88 % ZrO2 |
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Titanium 1.29 % Ti 2.15 % TiO2 |
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Silicon 15.10 % Si 32.31 % SiO2 |
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Hydrogen 0.05 % H 0.48 % H2O |
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Oxygen 32.69 % O |
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Fluorine 6.64 % F 6.64 % F |
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- %
F -2.80 % -O=F2 |
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______ ______ |
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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. |
| Name Pronunciation: |
Hiortdahlite + Pronunciation  |
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