Mineralogy Database

Tephroite Mineral Data

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General Tephroite Information

Help on Chemical  Formula: Chemical Formula: Mn2SiO4
Help on Composition: Composition: Molecular Weight = 201.96 gm
   Manganese  54.41 %  Mn   70.25 % MnO
   Silicon    13.91 %  Si   29.75 % SiO2
   Oxygen     31.69 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+2(SiO4)
Help on Environment: Environment: Contact metamorphism of manganese bearing rocks.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1823
Help on Locality: Locality: Franklin and Sparta, New Jersey, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek tephros - "ash gray" for its color.
Help on Name Pronunciation: Name Pronunciation: Tephroite + Pronunciation Say TEPHROITE
Help on Synonym: Synonym: ICSD 100433
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