Tuhualite

Overview

(Na,K)Fe+2Fe+3(Si6O15)
Fluorescence: none	Barely Detectable Radiation	Magnetic: no

Description

Physical Properties

Property	Value
Density	2.89 g/cc
Hardness - Mohs	Tuhualite - 3.0-4.0  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	purple, blue, black
Streak	reddish gray

Crystal Properties

Property	Value
Crystal structure	orthorhombic - dipyramidal
Cleavage	-
Tenacity	brittle
Fracture	brittle
Luster	-

Similar Minerals

Dana Number : 66.03.04.01

Class: 66

Group: 66.03

Subgroup: 66.03.04 - tahualite

Dana Number	Mineral Name	Formula
66.03.04.01	tuhualite	(Na,K)Fe+2Fe+3(Si6O15)
66.03.04.02	zektzerite	NaLiZrSi6O15

Nickel-Strunz Number : 09.DN.05

Group : 09

Subgroup : DN

Nickel-Strunz Number	Mineral Name	Formula
09.DN.05	tuhualite	(Na,K)Fe+2Fe+3(Si6O15)
09.DN.05	zektzerite	NaLiZrSi6O15

Specimens

Localities

Uses