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Turtmannite
Type Locality
Pipji glacier, Pipjitälli, Turtmann Valley, Wallis (Valais), Switzerland
Mineral Data
(Mn,Mg)
22.5
Mg
3-3x
((V
5+
,As
5+
)O
4
)
3
(As
3+
O
3
)
x
(SiO
4
)
3
O
5-5x
(OH)
20+x
Strunz:
8.BE.45
Physical Properties
Streak:
White
Hardness:
0.0
