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Arfvedsonite Mineral Data
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General Arfvedsonite Information
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 Chemical Formula: |
NaNa2(Fe++4Fe+++)Si8O22(OH)2 |
| Composition: |
Molecular Weight = 958.89 gm |
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Sodium 7.19 % Na 9.70 % Na2O |
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Iron 29.12 % Fe 29.97 % FeO / 8.33 % Fe2O3 |
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Silicon 23.43 % Si 50.13 % SiO2 |
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Hydrogen 0.21 % H 1.88 % H2O |
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Oxygen 40.04 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Na3Fe2+4Fe3+(Si8O22)(OH)2 |
| Environment: |
Igneous syenites and pegmatites. |
| IMA Status: |
Valid Species (Pre-IMA) 1923 |
| Locality: |
Boulder Co., Colorado. Link to MinDat.org Location Data. |
| Name Origin: |
Named after the Swedish chemist, J. A. Arfvedson (1792-1841). |
| Name Pronunciation: |
Arfvedsonite + Pronunciation  |
| Synonym: |
ICSD 64820 |
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PDF 42-1369 |
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