| |
 |
Marecottite Mineral Data
|
|
|
General Marecottite Information
|
 Chemical Formula: |
Mg3(H2O)18[(UO2)4O3(SO4)2]2•10(H2O) |
| Composition: |
Molecular Weight = 3,310.81 gm |
| |
Magnesium 1.31 % Mg 2.18 % MgO |
| |
Uranium 59.24 % U 67.20 % UO2 |
| |
Manganese 0.96 % Mn 1.24 % MnO |
| |
Hydrogen 1.77 % H 15.79 % H2O |
| |
Sulfur 3.85 % S 9.60 % SO3 |
| |
Oxygen 32.87 % O |
| |
______ ______ |
| |
100.00 % 96.02 % = TOTAL OXIDE |
| Empirical Formula: |
Mg1.79Mn2+0.58(UO2)8.24(SO4)3.97(OH)2O5.64�28.02(H2O) |
| Environment: |
Secondary mineral formed at low pH (<5) from the oxidation of sulfides in uranium-bearing deposits. (zippeite group; structure) |
| IMA Status: |
Approved IMA 2003 (Dana # Added) |
| Locality: |
La Creusaz U-prospect near Les Marecottes, Western Swiss Alps, Switzerland. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality. |
| Synonym: |
IMA2001-056 |
| |