Mineralogy Database

Okhotskite-(Mn++) Mineral Data

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General Okhotskite-(Mn++) Information

Help on Chemical  Formula: Chemical Formula: Ca2(Mn++,Mg)(Mn+++,Al,Fe+++)Si3O10(OH)4
Help on Composition: Composition: Molecular Weight = 530.54 gm
   Calcium    14.35 %  Ca   20.08 % CaO
   Magnesium   1.37 %  Mg    2.28 % MgO
   Manganese  18.64 %  Mn    9.36 % MnO / 16.37 % Mn2O3
   Aluminum    2.54 %  Al    4.80 % Al2O3
   Iron        4.21 %  Fe    6.02 % Fe2O3
   Silicon    15.88 %  Si   33.98 % SiO2
   Hydrogen    0.78 %  H     6.96 % H2O
   Oxygen     42.22 %  O
             ______        ______ 
             100.00 %       99.85 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca1.9Mn2+0.7Mg0.3Mn3+1.1Al0.5Fe3+0.4Si3O9.9(OH)4.1
Help on Environment: Environment: In network veinlets cutting hematite-rich ores.
Help on IMA Status: IMA Status: Approved IMA 1987
Help on Locality: Locality: From the Kokuriki mine, at Hiyoshi, about 20 km north of Kitami City, Hikkaido, Japan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named in 1987 by Togari and Akasaka for the Sea of Okhotsk, along which the mine is located.
Help on Name Pronunciation: Name Pronunciation: Okhotskite-(Mn++) + Pronunciation Say OKHOTSKITE-(MN++)