Khibinskite

General Information: Chemical Formula:K2ZrSi2O7 Composition:(Molecular Weight = 337.59 gm)Potassium 23.16 % K Zirconium 27.02 % ZrSilicon 16.64 % SiOxygen 33.18 % O  Empirical Formula: K2ZrSi2O7 Environment:Aegirine-rich metasomatic rocks. IMA Status:Approved IMA 1974 Locality:Gakman Valley, Khibiny massif, Kola Peninsula, Russia. Name Origin:Named for the locality.Physical Properties: Cleavage:[001] Perfect, [100] Perfect, [111] Perfect Color:white, light yellow, or colorless. Density:3.3 - 3.4, Average = 3.34 Diaphaniety:Translucent Habits:Stellate - Occurs as spherical, radial aggregates radiating from a "star" like point., Inclusions - Generally found as inclusions in other minerals., Hardness:4.5-5.5 Luster:Greasy (Oily) Streak:whiteMore details...