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Thorbastnasite Mineral Data
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General Thorbastnasite Information
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 Chemical Formula: |
Th(Ca,Ce)(CO3)2F2•3(H2O) |
| Composition: |
Molecular Weight = 509.19 gm |
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Calcium 5.90 % Ca 8.26 % CaO |
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Cerium 6.88 % Ce 8.06 % Ce2O3 |
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Thorium 45.57 % Th 51.85 % ThO2 |
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Hydrogen 1.19 % H 10.61 % H2O |
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Carbon 4.72 % C 17.29 % CO2 |
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Oxygen 28.28 % O |
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Fluorine 7.46 % F 7.46 % F |
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- %
F -3.14 % -O=F2 |
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______ ______ |
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100.00 % 100.39 % = TOTAL OXIDE |
| Empirical Formula: |
ThCa0.75Ce0.25(CO3)2F2•3(H2O) |
| Environment: |
Metasomatic albitite and quartz�muscovite veinlets in an alkaline exocontact surrounding a syenite intrusive. |
| IMA Status: |
Approved IMA 1965 |
| Locality: |
Pichikhol alkaline massif, Balygtyg-Khem River, Sangilen Upland, Tuva, Siberia, Russia. Link to MinDat.org Location Data. |
| Name Origin: |
Named for a thorium-bearing mineral chemically similar to bastnasite. |
| Name Pronunciation: |
Thorbastnasite + Pronunciation  |
| Synonym: |
Thorbastnaesite |
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