Fenaksite

Overview

(K,Na,Ca)4(Fe+2,Fe+3,Mn)2Si8O20(OH,F)
Fluorescence: none	Barely Detectable Radiation	Magnetic: no

Description

Physical Properties

Property	Value
Density	2.744 g/cc
Hardness - Mohs	Fenaksite - 5.0-5.5  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	brown, pink
Streak	white

Crystal Properties

Property	Value
Crystal structure	triclinic - pinacoidal
Cleavage	good
Tenacity	-
Fracture	-
Luster	pearly

Similar Minerals

Dana Number : 70.01.01.02

Class: 70

Group: 70.01

Subgroup: 70.01.01 - litidionite

Dana Number	Mineral Name	Formula
70.01.01.02	fenaksite	(K,Na,Ca)4(Fe+2,Fe+3,Mn)2Si8O20(OH,F)
70.01.01.03	manaksite	KNaMn+2Si4O10

Nickel-Strunz Number : 09.DG.70

Group : 09

Subgroup : DG

Nickel-Strunz Number	Mineral Name	Formula
09.DG.70	fenaksite	(K,Na,Ca)4(Fe+2,Fe+3,Mn)2Si8O20(OH,F)
09.DG.70	manaksite	KNaMn+2Si4O10

Specimens

Localities

Uses