Umbite

Umbite
General
Category Inosilicates
Formula
(repeating unit)		 K2ZrSi3O9·H2O
Strunz classification 9.DG.25
Crystal system Orthorhombic
Crystal class Disphenoidal (222)
H-M symbol: (222)
Space group P212121
Unit cell a = 10.2 Å, b = 13.24 Å
c = 7.17 Å; Z = 4
Identification
Color colorless, light yellow
Luster vitreous
References [1]

Umbite (K2(Zr,Ti)Si3O9·H2O) is a potassium zirconosilicate mineral found in northern Russia. Named after Lake Umb (Lake Umbozero), its type locality is Vuonnemiok River Valley, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia.[2][3]

References

  1. ↑ Mindat
  2. ↑ Webmineral.com - Umbite
  3. ↑ Handbook of Mineralogy (HOM - MSA) - Umbite
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