Umbite
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]
| 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] |
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