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Hydrodelhayelite

Type Locality
Apatitovyi Tsirk (Apatite Circus), Rasvumchorr Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
Mineral Data
KCa2AlSi7O17(OH)2·6H2O
Strunz: 
9.EB.10
Physical Properties
Hardness: 
4.0