Fersmite

Overview

(Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6
Fluorescence: none	Mildly Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	4.69-4.79 g/cc
Hardness - Mohs	Fersmite - 4.0-4.5  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	brown, black
Streak	gray brown

Crystal Properties

Property	Value
Crystal structure	orthorhombic - dipyramidal
Cleavage	none
Tenacity	brittle
Fracture	conchoidal
Luster	vitreous, resinous

Similar Minerals

Dana Number : 08.03.03.01

Class: 08

Group: 08.03

Subgroup: 08.03.03 - fersmite

Dana Number	Mineral Name	Formula
08.03.03.01	fersmite	(Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6

Nickel-Strunz Number : 04.DG.05

Group : 04

Subgroup : DG

Nickel-Strunz Number	Mineral Name	Formula
04.DG.05	euxenite-(Y)	(Y,Ca,Ce)(Nb,Ta,Ti)2O6
04.DG.05	fersmite	(Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6
04.DG.05	yttrocrasite-(Y)	(Y,Th,Ca,U)(Ti,Fe+3)2(O,OH)6

Specimens

Localities

Uses