| |
 |
Ferri-clinoferroholmquistite Mineral Data
|
|
|
General Ferri-clinoferroholmquistite Information
|
 Chemical Formula: |
[ ]Li2(Fe+++2Fe++3)Si8O22(OH)2 |
| Composition: |
Molecular Weight = 848.25 gm |
| |
Sodium 0.98 % Na 1.32 % Na2O |
| |
Lithium 1.78 % Li 3.84 % Li2O |
| |
Magnesium 3.04 % Mg 5.04 % MgO |
| |
Aluminum 0.83 % Al 1.56 % Al2O3 |
| |
Iron 21.27 % Fe 13.13 % FeO / 15.81 % Fe2O3 |
| |
Silicon 26.49 % Si 56.67 % SiO2 |
| |
Hydrogen 0.21 % H 1.90 % H2O |
| |
Oxygen 44.87 % O |
| |
Fluorine 0.54 % F 0.54 % F |
| |
- %
F -0.23 % -O=F2 |
| |
______ ______ |
| |
100.00 % 99.58 % = TOTAL OXIDE |
| Empirical Formula: |
Na0.28Li1.9Na0.08Fe3+1.68Fe2+1.55Mg1.06Li0.28Al0.26Si8O22(OH)1.79F0.24 |
| Environment: |
Metamorphic episyenites (deslicification and albitizaton of a cordierite-bearing porphyritic granite). New Group 5 amphibole classification. |
| IMA Status: |
Approved IMA 2003 (Dana # Added) |
| Locality: |
Pedriza Massif, Sierra del Guadarrama, Spain. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Johan Holmquist (1866-1946) and the Fe++ and Fe+++ clinoamphiboles. |
| Synonym: |
IMA2001-066 |
| |