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Potassic-ferro-ferri-sadanagaite
Type Locality
Ilmen Natural Reserve, Ilmen Mts, Chelyabinsk Oblast', Southern Urals, Urals Region, Russia
Mineral Data
{K}{Ca
2
}{Fe
2+
3
Fe
3+
2
}(Al
3
Si
5
O
22
)(OH)
2
Strunz:
9.DE.15
Physical Properties
Colour:
black
Crystal System:
Monoclinic
Hardness:
5.5 - 6.0
