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Mangano-mangani-ungarettiite

Type Locality
Hoskins mine, Grenfell, Forbes Co., New South Wales, Australia
Mineral Data
NaNa2(Mn2+2Mn3+3)(Si8O22)O2
Strunz: 
9.DE.25
Physical Properties
Crystal System: 
Monoclinic
Hardness: 
6.0
Synonyms
Synonyms: 
Manganomanganiungarettiite