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Johninnesite

Type Locality
Kombat Mine (Klein Otavi; Asis), Kombat, Grootfontein District, Otjozondjupa Region, Namibia
Mineral Data
Na2Mn2+9Mg7(OH)8[AsO4]2[Si6O17]2
Strunz: 
9.DH.70
Physical Properties
Hardness: 
5.0 - 6.0