| |
 |
Tungusite Mineral Data
|
|
|
General Tungusite Information
|
 Chemical Formula: |
[Ca14(OH)8](Si8020)(Si8020)2[Fe++9(OH)14] |
| Composition: |
Molecular Weight = 761.15 gm |
| |
Sodium 1.45 % Na 1.95 % Na2O |
| |
Calcium 18.22 % Ca 25.49 % CaO |
| |
Magnesium 0.67 % Mg 1.11 % MgO |
| |
Manganese 1.01 % Mn 1.30 % MnO |
| |
Aluminum 1.52 % Al 2.88 % Al2O3 |
| |
Iron 10.27 % Fe 11.61 % FeO / 1.78 % Fe2O3 |
| |
Silicon 21.92 % Si 46.89 % SiO2 |
| |
Hydrogen 0.79 % H 7.10 % H2O |
| |
Oxygen 44.14 % O |
| |
______ ______ |
| |
100.00 % 100.13 % = TOTAL OXIDE |
| Empirical Formula: |
Ca3.46Na0.48Mn2+0.06Fe2+1.23Al0.37Mg0.21Fe3+0.17Mn2+0.08Si5.94Al0.06O15(OH)6 |
| Environment: |
A secondary mineral forming crusts lining cavities and amygdules in hydrothermally altered basalts. |
| IMA Status: |
Approved IMA 1966 |
| Locality: |
Found along the Lower Tunguska River, near Tura, central Siberia, Russia. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality. |
| Name Pronunciation: |
Tungusite + Pronunciation  |
| |