Geigerite

Geigerite

Geigerite is a mineral, a complex hydrous manganese arsenate with formula: Mn5(AsO3OH)2(AsO4)2·10H2O. It forms triclinic pinacoidal vitreous colorless, red to brown crystals. It has a Mohs hardness of 3 and a specific gravity of 3.05. [http://webmineral.com/data/Geigerite.shtml Webmineral data] [http://www.mindat.org/min-1669.html Mindat]

It was discovered in Grischun, Switzerland in 1989. It was namedin honor of Dr. Thomas Geiger (1886–1976), Wiesendangen, Switzerland, who studied the Falotta manganese ores. [http://rruff.geo.arizona.edu/doclib/hom/geigerite.pdf Mineral Handbook]

ee also

*List of minerals
*List of minerals named after people

References


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