Mineralogy Database

Melanocerite-(Ce) Mineral Data

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General Melanocerite-(Ce) Information

Help on Chemical  Formula: Chemical Formula: (Ce,Th,Ca)5(Si,B)3O12(OH,F)•n(H2O) (?)
Help on Composition: Composition: Molecular Weight = 903.06 gm
   Calcium     4.88 %  Ca    6.83 % CaO
   Lanthanum  10.77 %  La   12.63 % La2O3
   Cerium     46.55 %  Ce   54.52 % Ce2O3
   Thorium     5.14 %  Th    5.85 % ThO2
   Silicon     6.22 %  Si   13.31 % SiO2
   Boron       1.20 %  B     3.85 % B2O3
   Hydrogen    0.28 %  H     2.49 % H2O
   Oxygen     23.92 %  O
   Fluorine    1.05 %  F     1.05 % F
                -   %   F    -0.44 % -O=F2    
             ______        ______ 
             100.00 %      100.09 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ce3La0.7Th0.2Ca1.1Si2BO12(OH)0.5F0.5•(H2O)
Help on Environment: Environment: Alkalic rocks and their cogenetic pegmatites. Also in metamorphosed alkalic rocks.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1887
Help on Locality: Locality: Isle of Kjeo in the Langesundfiord district, southern Norway. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named from the Greek meaning "black" and the composition (Cerium).
Help on Name Pronunciation: Name Pronunciation: Melanocerite-(Ce) + Pronunciation Say MELANOCERITE-(CE)