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Magnesiodumortierite Mineral Data
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General Magnesiodumortierite Information
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 Chemical Formula: |
(Mg,Ti,[ ])<1(Al,Mg)2Al4Si3O18-y(OH)yB y=2-3 |
| Composition: |
Molecular Weight = 572.14 gm |
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Magnesium 4.25 % Mg 7.04 % MgO |
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Titanium 2.51 % Ti 4.19 % TiO2 |
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Aluminum 25.94 % Al 49.01 % Al2O3 |
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Silicon 14.73 % Si 31.51 % SiO2 |
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Boron 1.89 % B 6.08 % B2O3 |
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Hydrogen 0.35 % H 3.15 % H2O |
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Oxygen 50.34 % O |
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______ ______ |
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100.00 % 100.98 % = TOTAL OXIDE |
| Empirical Formula: |
MgTi0.3Al5.5Si3O16B(OH)2 |
| Environment: |
In pyrope megablasts which occur in coesite bearing quartz-phengite-kyanite schists. |
| IMA Status: |
Approved IMA 1995 |
| Locality: |
Dor-Maira massif, western Alps, Italy. Link to MinDat.org Location Data. |
| Name Origin: |
For its containing magnesium and the relationship to dumortierite. |
| Synonym: |
ICSD 79840 |
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IMA1992-050 |
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PDF 47-1876 |
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