Minerals identify

Know how to recognize them

Geigerite

Arsenate mineral

Geigerite is a mineral, a complex hydrous manganese arsenate with formula: Mn5(AsO3OH)2(AsO4)2·10H2O. It forms triclinic pinacoidal, vitreous, colorless to red to brown crystals. It has a Mohs hardness of 3.05.

It was discovered in Grischun in 1989. It was named in honor of Thomas Geiger (1886–1976), Wiesendangen, Switzerland, who studied the Falotta manganese ores.

Identification

Color of mineral

Red

Mohs scale ( mineral hardness )

3

Density ( specific gravity )

1.601
1.63
1.66

Luster ( interacts light )

Pearly
Vitreous

Crystal ( diaphaneity )

Triclinic