Umbite

Umbite (chemical formula 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.^[3][4]

Umbite
Pinkish white crystals of the rare zirconium mineral umbyte named after the Lake Umb, 20 km east of the type occurrence in Vuonnemiok River Valley (Khibiny Massif, Murmansk Oblast, Russian Federation.
General
Category	Inosilicates
Formula	K2ZrSi3O9·H2O
IMA symbol	Umb[1]
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	[2]