Parsettensite

General Information:
 Chemical Formula:
(K,Na,Ca)(Mn,Al)7Si8O20(OH)8·2(H2O) (?)
 Environment:
Manganese deposits.
 Locality:
Parsettens Alp, Val d'Err, Grisons, Switzerland.
 Name Origin:
Named after its locality.
Physical Properties:
 Cleavage:
[001] Perfect
 Color:
copper red.
 Density:
2.59
 Diaphaniety:
Translucent to subtranslucent
 Habits:
Massive - Lamellar - Distinctly foliated fine-grained forms., Micaceous - Platy texture with "flexible" plates.,
 Hardness:
1.5 - Between Talc and Gypsum
 Luster:
Vitreous (Glassy)
 Streak:
brownish yellow
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