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Borocookeite Mineral Data
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General Borocookeite Information
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 Chemical Formula: |
Li(1+3x)Al(4-x)(BSi3)O10(OH,F)8 [x = 0-0.33] |
| Composition: |
Molecular Weight = 502.73 gm |
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Lithium 2.21 % Li 4.76 % Li2O |
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Aluminum 20.39 % Al 38.53 % Al2O3 |
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Silicon 16.76 % Si 35.85 % SiO2 |
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Boron 1.29 % B 4.15 % B2O3 |
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Hydrogen 1.56 % H 13.98 % H2O |
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Oxygen 56.65 % O |
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Fluorine 1.13 % F 1.13 % F |
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- %
F -0.48 % -O=F2 |
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______ ______ |
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100.00 % 97.93 % = TOTAL OXIDE |
| Empirical Formula: |
Li1.6Al3.8B0.6Si3O10F0.3(OH)7.8 |
| Environment: |
Late stage pocket species in tourmaline-rich miarolitic pegmatites. |
| IMA Status: |
Approved IMA 2003 (Dana # Added) |
| Locality: |
Malkhan gem tourmaline deposit, Central Transbaikalia, Russia. Link to MinDat.org Location Data. |
| Name Origin: |
Named as the boron-rich analog of cookeite. |
| Synonym: |
IMA2000-013 |
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