Fluorthalénite-(Y)

Overview

Y3Si3O10F
Fluorescence: none	Not Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	4.24 g/cc
Hardness - Mohs	Fluorthalénite-(Y) - 4.0-5.0  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	colorless, white
Streak	white

Crystal Properties

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

Similar Minerals

Dana Number : 55.02.01b.04

Class: 55

Group: 55.02

Subgroup: 55.02.01b - thortveitite

Dana Number	Mineral Name	Formula
55.02.01b.02	thalénite-(Y)	Y3Si3O10(OH)
55.02.01b.04	fluorthalénite-(Y)	Y3Si3O10F

Nickel-Strunz Number : 09.BJ.20

Group : 09

Subgroup : BJ

Nickel-Strunz Number	Mineral Name	Formula
09.BJ.20	fluorthalénite-(Y)	Y3Si3O10F
09.BJ.20	thalénite-(Y)	Y3Si3O10(OH)

Specimens

Localities

Uses