Mineralogy Database

Norrishite Mineral Data

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General Norrishite Information

Help on Chemical  Formula: Chemical Formula: K(Mn+++2Li)Si4O10(O)2
Help on Composition: Composition: Molecular Weight = 460.25 gm
   Potassium   8.50 %  K    10.23 % K2O
   Lithium     1.51 %  Li    3.25 % Li2O
   Manganese  23.87 %  Mn   34.30 % Mn2O3
   Silicon    24.41 %  Si   52.22 % SiO2
   Oxygen     41.71 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: KMn3+2LiSi4O12
Help on Environment: Environment: Major to minor component of manganiferous schists, formed through metamorphism of a stratiform manganese deposit. Resembles biotite.
Help on IMA Status: IMA Status: Approved IMA 1989
Help on Locality: Locality: Hoskins mine, three km west of Grenfell, New South Wales, Australia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Keith Norrish of the Division of Soils, Commonwealth Scientific and Industrial Research Organization, Australia.
Help on Name Pronunciation: Name Pronunciation: Norrishite + Pronunciation Say NORRISHITE