General Almarudite Information
|
 Chemical Formula: |
K([ ],Na)2(Mn,Fe,Mg)2(Be,Al)3[Si12O30] |
| Composition: |
Molecular Weight = 1,000.32 gm |
| |
Potassium 3.36 % K 4.05 % K2O |
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Sodium 0.48 % Na 0.65 % Na2O |
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Calcium 0.08 % Ca 0.11 % CaO |
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Magnesium 0.92 % Mg 1.53 % MgO |
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Manganese 5.66 % Mn 7.30 % MnO |
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Beryllium 1.86 % Be 5.18 % BeO |
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Aluminum 2.16 % Al 4.08 % Al2O3 |
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Zinc 0.20 % Zn 0.24 % ZnO |
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Iron 3.46 % Fe 4.45 % FeO |
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Silicon 33.83 % Si 72.38 % SiO2 |
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Oxygen 47.98 % O |
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______ ______ |
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100.00 % 99.98 % = TOTAL OXIDE |
| Empirical Formula: |
K0.86Na0.21Mn2+1.03Fe2+0.62Mg0.38Zn0.03Ca0.02Be2.07Al0.8Si12.05O30 |
| Environment: |
In xenoliths in leucite tephrite lava. Milarite group; structure determined. |
| IMA Status: |
Approved IMA 2004 (Dana # Added) |
| Locality: |
A quarry at the Bellerberg volcano lava field, near Ettringen, 2 km north of Mayen, Laacher See region, eastern Eifel area, Germany. Link to MinDat.org Location Data. |
| Name Origin: |
After the authors� hosting and supporting institution, "Universit�t Wien", and is derived from the university�s proper name "ALma MAter RUDolphina". |
| Synonym: |
IMA2002-048 |
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