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Natromontebrasite Mineral Data
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General Natromontebrasite Information
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 Chemical Formula: |
(Na,Li)Al(PO4)(OH,F) |
| Composition: |
Molecular Weight = 158.44 gm |
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Sodium 10.88 % Na 14.67 % Na2O |
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Lithium 1.10 % Li 2.36 % Li2O |
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Aluminum 17.03 % Al 32.18 % Al2O3 |
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Phosphorus 19.55 % P 44.80 % P2O5 |
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Hydrogen 0.48 % H 4.26 % H2O |
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Oxygen 47.97 % O |
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Fluorine 3.00 % F 3.00 % F |
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- %
F -1.26 % -O=F2 |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Na0.75Li0.25Al(PO4)(OH)0.75F0.25 |
| Environment: |
Natromontebrasite (1913) has been shown to be a mixture of an OH-rich amblygonite and lacroixite, with subordinate quantities of wardite. |
| IMA Status: |
Discredited IMA 2006 |
| Locality: |
Canyon City and Eight Mile Park, Fremont County, Colorado, USA. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the composition and resemblance to montebrasite. |
| Name Pronunciation: |
Natromontebrasite + Pronunciation  |
| Synonym: |
Fremontite |
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