| |
 |
Rowlandite-(Y) Mineral Data
|
|
|
General Rowlandite-(Y) Information
|
 Chemical Formula: |
Y4Fe++Si4O14F2 (?) |
| Composition: |
Molecular Weight = 785.80 gm |
| |
Yttrium 45.26 % Y 57.47 % Y2O3 |
| |
Iron 7.11 % Fe 9.14 % FeO |
| |
Silicon 14.30 % Si 30.59 % SiO2 |
| |
Oxygen 28.50 % O |
| |
Fluorine 4.84 % F 4.84 % F |
| |
- %
F -2.04 % -O=F2 |
| |
______ ______ |
| |
100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Y4Fe2+Si4O14F2 |
| Environment: |
In some rare-earth-rich pegmatites. Associated with gadolinite. |
| IMA Status: |
Valid Species (Pre-IMA) 1891 |
| Locality: |
Baringer Hill pegmatite, 26 km west of Burnet, Llano Co., and from Clear Creek, Burnet Co., Texas, USA. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Henry Augustus Rowland (1848-1901), American physicist and spectroscopist, of Johns Hopkins University, Baltimore, Maryland, USA, |
| Name Pronunciation: |
Rowlandite-(Y) + Pronunciation  |
| |