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Oftedalite Mineral Data
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General Oftedalite Information
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 Chemical Formula: |
(Sc,Ca)2KBe3Si12O30 |
| Composition: |
Molecular Weight = 973.03 gm |
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Potassium 3.94 % K 4.74 % K2O |
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Calcium 3.25 % Ca 4.55 % CaO |
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Yttrium 0.27 % Y 0.35 % Y2O3 |
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Scandium 4.44 % Sc 6.80 % Sc2O3 |
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Manganese 1.02 % Mn 1.31 % MnO |
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Beryllium 2.70 % Be 7.48 % BeO |
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Aluminum 0.25 % Al 0.47 % Al2O3 |
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Iron 0.23 % Fe 0.30 % FeO |
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Silicon 34.58 % Si 73.98 % SiO2 |
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Oxygen 49.33 % O |
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______ ______ |
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100.00 % 99.98 % = TOTAL OXIDE |
| Empirical Formula: |
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| Environment: |
Occurs intergrown with Sc-rich milarite in the Heftetjern pegmatite. Milarite group |
| IMA Status: |
Approved IMA 2004 (Dana # Added) |
| Locality: |
Heftetjern pegmatite, about 4.3 km NW of T�rdal, Telemark county, southern Norway. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Ivar Oftedal (1894-1976), former Professor of Mineralogy at the Institute of Geology, University of Oslo, Norway. |
| Synonym: |
IMA2003-045a |
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