| |
 |
Stillwellite-(Ce) Mineral Data
|
|
|
General Stillwellite-(Ce) Information
|
 Chemical Formula: |
(Ce,La,Ca)BSiO5 |
| Composition: |
Molecular Weight = 245.85 gm |
| |
Calcium 0.33 % Ca 0.46 % CaO |
| |
Lanthanum 16.95 % La 19.88 % La2O3 |
| |
Cerium 28.50 % Ce 33.38 % Ce2O3 |
| |
Silicon 11.42 % Si 24.44 % SiO2 |
| |
Boron 4.40 % B 14.16 % B2O3 |
| |
Neodymium 5.87 % Nd 6.84 % Nd2O3 |
| |
Oxygen 32.54 % O |
| |
______ ______ |
| |
100.00 % 99.15 % = TOTAL OXIDE |
| Empirical Formula: |
Ce0.5La0.3Nd0.1Ca0.02BSiO5 |
| Environment: |
Metasomatic replacement of metamorphosed calcareous sediments and alkalic pegmatites in syenite. |
| IMA Status: |
Valid Species (Pre-IMA) 1955 |
| Locality: |
Mary Kathleen mine, 55 km east of Mt. Isa, Queensland, Australia. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Frank Leslie Stillwell (1888-1963), Australian ore mineralogist and the dominant Ce content. |
| Name Pronunciation: |
Stillwellite-(Ce) + Pronunciation  |
| Synonym: |
ICSD 67685 |
| |
PDF 26-349 |
| |