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Kalifersite

Type Locality
Kukisvumchorr Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
Mineral Data
(K,Na)5Fe3+7Si20O50(OH)6·12H2O
Strunz: 
9.EE.25
Physical Properties
Crystal System: 
Triclinic
Hardness: 
2.0