Mineral description : Richterite

Richterite from Långban.

Mineral class	Silicates : Inosilicates : Tremolite - Glaucophane - Riebeckite group.
Chemical formula	Na2Ca(Mg,Fe,Mn,Al)5(OH/Si4O11)2
Crystal system	Monoclinic.
Habitus	As radiating and stalky crystals. Also as massive aggregates.
Cleavage	Perfect in two directions with 124 degrees angle.
Hardness	5-6
Density	3.1-3.3
Color	Yellowish brown to brownish red.
Streak
Luster	Vitreous.
Description
Occurance	In metamorph scarn associated with manganeese mines.
Associates
Notes
Locations	Commonly in the manganeese mines in Värmland. Långban, Värmland. Harstigen, Persberg, Värmland. Pajsberg, Värmland. Nordmark, Värmland.

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