Mineralogy Database

Vajdakite Mineral Data

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General Vajdakite Information

Help on Chemical  Formula: Chemical Formula: [(MoO2)2(H2O)2As2O5]•(H2O)
Help on Composition: Composition: Molecular Weight = 535.57 gm
   Molybdenum  34.04 %  Mo   51.06 % MoO3
   Arsenic     27.98 %  As   36.94 % As2O3
   Hydrogen     1.24 %  H    11.10 % H2O
   Oxygen      36.74 %  O
              ______        ______ 
              100.00 %       99.10 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mo1.9As2O9•3.3(H2O)
Help on Environment: Environment: On fractures in proximity to an ore vein. Formed by concentrated sulfuric acid in the presence of As2O3.
Help on IMA Status: IMA Status: Approved IMA 1999 (Dana # Added)
Help on Locality: Locality: Jachymov, NW Bohemia, Czech Republic. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Josef Vajdak (1930-), for his significant contribution in the study of minerals in the Jachymov ore district.
Help on Synonym: Synonym: IMA1998-031