Mineralogy Database

Jimthompsonite Mineral Data

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General Jimthompsonite Information

Help on Chemical  Formula: Chemical Formula: (Mg,Fe++)5Si6O16(OH)2
Help on Composition: Composition: Molecular Weight = 619.47 gm
   Magnesium  14.71 %  Mg   24.40 % MgO
   Iron       11.27 %  Fe   14.50 % FeO
   Silicon    27.20 %  Si   58.20 % SiO2
   Hydrogen    0.33 %  H     2.91 % H2O
   Oxygen     46.49 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg3.75Fe2+1.25Si6O16(OH)2
Help on Environment: Environment: In the black wallrock between chlorite and actinolite zones of a metamorphosed ultramafic body.
Help on IMA Status: IMA Status: Approved IMA 1978
Help on Locality: Locality: In the Carleton talc quarry, near Chester, Windsor Co., Vermont, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for James Burleigh Thompson, Jr. (1921- ), eminent petrologist of Harvard University, Cambridge, Massachusetts, USA.
Help on Name Pronunciation: Name Pronunciation: Jimthompsonite + Pronunciation Say JIMTHOMPSONITE
Help on Synonym: Synonym: ICSD 100657
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