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Keiviite-(Yb)

Type Locality
Ploskaya Mt, Western Keivy Massif, Keivy Mountains, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
Mineral Data
(Yb,Y)2Si2O7
Strunz: 
9.BC.05
Physical Properties
Crystal System: 
Monoclinic
Hardness: 
4.0 - 5.0
Synonyms
Synonyms: 
Keiviite-Yb, Keiviite Yb and Keiviite - Yb