Mineralogy Database

Armangite Mineral Data

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General Armangite Information

Help on Chemical  Formula: Chemical Formula: Mn26As+++18O50(OH)4(CO3)
Help on Composition: Composition: Molecular Weight = 3,704.99 gm
   Manganese  38.55 %  Mn   49.78 % MnO
   Arsenic    36.40 %  As   48.06 % As2O3
   Hydrogen    0.11 %  H     0.97 % H2O
   Carbon      0.32 %  C     1.19 % CO2
   Oxygen     24.61 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+26As18O50(OH)4(CO3)
Help on Environment: Environment: On a museum specimen collected from a metamorphosed Fe-Mn deposit.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1920
Help on Locality: Locality: Langban, V´┐Żarmland, Sweden. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Arsenic and MANGanese in the composition.
Help on Name Pronunciation: Name Pronunciation: Armangite + Pronunciation Say ARMANGITE
Help on Synonym: Synonym: ICSD 100555
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