Mineralogy Database

Graeserite Mineral Data

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General Graeserite Information

Help on Chemical  Formula: Chemical Formula: (Fe+++,Ti)4Ti3AsO13(OH)
Help on Composition: Composition: Molecular Weight = 666.95 gm
   Titanium  21.54 %  Ti   35.93 % TiO2
   Iron      33.49 %  Fe   47.89 % Fe2O3
   Arsenic   11.23 %  As   14.83 % As2O3
   Hydrogen   0.15 %  H     1.35 % H2O
   Oxygen    33.58 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe3+4Ti3AsO13(OH)
Help on Environment: Environment: The Fe++ dominant analog of tomichite and the As+++ dominant analog of derbylite. In hydrothermal veins in a two-mica paragneiss.
Help on IMA Status: IMA Status: Approved IMA 1998 (Dana # Added)
Help on Locality: Locality: Larchelitini, in the Monte Leone Nappe, Binntal region, western Alps, Switzerland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For Prof. Dr. Stefan Graeser (1935-), in recognition of his extensive research on the oxides and sulfosalts of arsenic in the Binntal region of Switzerland.
Help on Name Pronunciation: Name Pronunciation: Graeserite + Pronunciation Say GRAESERITE
Help on Synonym: Synonym: ICSD 50374