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Formula: Ca2Mn2+Fe3+Si5O14(OH)
Inosilicate (chain silicate), rhodonite group, forms a series with
babingtonite, manganese-bearing
mineral
Crystal System: Triclinic
Specific gravity: 3.452 measured, 3.59 calculated
Hardness: 5½ to 6
Streak: Brownish
Colour: Black, brownish black
Common impurities: Ti,Al,Mg,Na,K,F,Cl,H20,C
Environments:
At the type locality, the Rudnyi Kaskad deposit, Krasnoyarsk Krai, Russia, manganbabingtonite occurs in thin
stringers in
amphibolised garnet -
pyroxene - magnetite
skarn associated with an iron deposit
(Webmin, HOM).
Associated minerals include epidote,
calcite and
quartz
(HOM, Dana).
At the Iron Cap mine, Arizona, USA, manganbabingtonite replaces
hedenbergite-johannsenite
skarn, and is
associated with
ilvaite, andradite,
epidote, thaumasite,
calcite, quartz,
pyrite, galena and
sphalerite
(HOM).
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