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Efremovite
Type Locality
Coal mine No. 43, Kopeisk, Chelyabinsk coal basin, Chelyabinsk Oblast', Southern Urals, Urals Region, Russia
Mineral Data
(NH
4
)
2
Mg
2
(SO
4
)
3
Strunz:
7.AC.10
Physical Properties
Crystal System:
Isometric
Hardness:
2.0
