Mineralogy Database

Stillwellite-(Ce) Mineral Data

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General Stillwellite-(Ce) Information

Help on Chemical  Formula: Chemical Formula: (Ce,La,Ca)BSiO5
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: Ce0.5La0.3Nd0.1Ca0.02BSiO5
Help on Environment: Environment: Metasomatic replacement of metamorphosed calcareous sediments and alkalic pegmatites in syenite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1955
Help on Locality: Locality: Mary Kathleen mine, 55 km east of Mt. Isa, Queensland, Australia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Frank Leslie Stillwell (1888-1963), Australian ore mineralogist and the dominant Ce content.
Help on Name Pronunciation: Name Pronunciation: Stillwellite-(Ce) + Pronunciation Say STILLWELLITE-(CE)
Help on Synonym: Synonym: ICSD 67685
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