Geigerite
Encyclopedia
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.
It was discovered in Grischun, Switzerland
in 1989. It was named
in honor of Dr. Thomas Geiger (1886–1976), Wiesendangen, Switzerland, who studied the Falotta manganese ores.
Manganese
Manganese is a chemical element, designated by the symbol Mn. It has the atomic number 25. It is found as a free element in nature , and in many minerals...
arsenate
Arsenate
The arsenate ion is AsO43−.An arsenate is any compound that contains this ion. Arsenates are salts or esters of arsenic acid.The arsenic atom in arsenate has a valency of 5 and is also known as pentavalent arsenic or As[V]....
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
Specific gravity
Specific gravity is the ratio of the density of a substance to the density of a reference substance. Apparent specific gravity is the ratio of the weight of a volume of the substance to the weight of an equal volume of the reference substance. The reference substance is nearly always water for...
of 3.05.
It was discovered in Grischun, Switzerland
Switzerland
Switzerland name of one of the Swiss cantons. ; ; ; or ), in its full name the Swiss Confederation , is a federal republic consisting of 26 cantons, with Bern as the seat of the federal authorities. The country is situated in Western Europe,Or Central Europe depending on the definition....
in 1989. It was named
in honor of Dr. Thomas Geiger (1886–1976), Wiesendangen, Switzerland, who studied the Falotta manganese ores.