Vyuntspakhkite-(Y)

Overview

(Y,Yb,Er)4Al3Si5O18(OH)5
Fluorescence: yellow green under SW	Mildly Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	4.02 g/cc
Hardness - Mohs	Vyuntspakhkite-(Y) - 6.0-7.0  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	colorless, orange
Streak	white

Crystal Properties

Property	Value
Crystal structure	monoclinic - prismatic
Cleavage	none
Tenacity	brittle
Fracture	brittle
Luster	adamantine

Similar Minerals

Dana Number : 78.07.18.01

Class: 78

Group: 78.07

Subgroup: 78.07.18 - vyuntspakhkite-(Y)

Dana Number	Mineral Name	Formula
78.07.18.01	vyuntspakhkite-(Y)	(Y,Yb,Er)4Al3Si5O18(OH)5

Nickel-Strunz Number : 09.BG.40

Group : 09

Subgroup : BG

Nickel-Strunz Number	Mineral Name	Formula
09.BG.40	vyuntspakhkite-(Y)	(Y,Yb,Er)4Al3Si5O18(OH)5

Specimens

Localities

Uses