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Magnesioastrophyllite Mineral Data
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General Magnesioastrophyllite Information
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 Chemical Formula: |
K2Na[Na(Fe++,Fe+++,Mn)Mg2]Ti2Si8O26(OH)4F |
| Composition: |
Molecular Weight = 1,275.02 gm |
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Potassium 6.13 % K 7.39 % K2O |
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Sodium 3.61 % Na 4.86 % Na2O |
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Magnesium 3.81 % Mg 6.32 % MgO |
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Titanium 7.51 % Ti 12.53 % TiO2 |
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Manganese 2.15 % Mn 3.10 % Mn2O3 |
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Iron 19.71 % Fe 16.90 % FeO / 9.39 % Fe2O3 |
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Silicon 17.62 % Si 37.70 % SiO2 |
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Hydrogen 0.32 % H 2.83 % H2O |
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Oxygen 37.64 % O |
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Fluorine 1.49 % F 1.49 % F |
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- %
F -0.63 % -O=F2 |
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______ ______ |
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100.00 % 101.88 % = TOTAL OXIDE |
| Empirical Formula: |
K2Na2Mg2Fe3+1.5Fe2+3Mn3+0.5Ti2Si8O26(OH)4F |
| Environment: |
In a differentiated alkalic massif. |
| IMA Status: |
Approved IMA 1963 |
| Locality: |
From Mts. Kukisvumchorr and Yukspor, Khibiny massif, Kola Peninsula, Russia. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the magnesium content and relationship to astrophyllite. |
| Synonym: |
Magnesium astrophyllite - Renamed to Magnesioastrophyllite by Mineralogical Record, v39 (2008), p131 |
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