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Manganilvaite
Type Locality
Mogilata deposit, Septemvri mine (Deveti Septemvri mine), Madan ore field, Rhodope Mts, Smolyan Oblast, Bulgaria
Mineral Data
Ca(Mn
2+
,Fe
2+
)
2
Fe
3+
(Si
2
O
7
)O(OH)
Strunz:
9.BE.07
Physical Properties
Colour:
Black
Hardness:
5.5 - 6.0
Tenacity:
brittle
