Mineralogy Database

Ramsdellite Mineral Data

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General Ramsdellite Information

Help on Chemical  Formula: Chemical Formula: MnO2
Help on Composition: Composition: Molecular Weight = 86.94 gm
   Manganese  63.19 %  Mn  100.00 % MnO2
   Oxygen     36.81 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn4+O2
Help on Environment: Environment: Manganese deposits with pyrolusite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1943
Help on Locality: Locality: Lake Valley, Sierra County, New Mexico. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the American mineralogist, Lewis S. Ramsdell (1895-1975), of the University of Michigan, who first described the mineral.
Help on Name Pronunciation: Name Pronunciation: Ramsdellite + Pronunciation Say RAMSDELLITE
Help on Synonym: Synonym: Groutellite - pseudomorph of ramsdellite after groutite
  ICSD 78331
  PDF 44-142