| |
 |
Faheyite Mineral Data
|
|
|
General Faheyite Information
|
 Chemical Formula: |
(Mn,Mg)Fe+++2Be2(PO4)4•6(H2O) |
| Composition: |
Molecular Weight = 664.98 gm |
| |
Magnesium 0.91 % Mg 1.52 % MgO |
| |
Manganese 6.20 % Mn 8.00 % MnO |
| |
Beryllium 2.71 % Be 7.52 % BeO |
| |
Iron 16.80 % Fe 24.01 % Fe2O3 |
| |
Phosphorus 18.63 % P 42.69 % P2O5 |
| |
Hydrogen 1.82 % H 16.25 % H2O |
| |
Oxygen 52.93 % O |
| |
______ ______ |
| |
100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Mn2+0.75Mg0.25Fe3+2Be2(PO4)4•6(H2O) |
| Environment: |
Late-stage secondary mineral in a complex granite pegmatite. |
| IMA Status: |
Valid Species (Pre-IMA) 1953 |
| Locality: |
Sapucaia pegmatite mine, about 50 km east-southeast of Governador Valadares, Minas Gerais, Brazil. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Joseph John Fahey (1901-1980), American analytical chemist, U.S. Geological Survey, Washington, D.C., USA. |
| Name Pronunciation: |
Faheyite  |
| |