Jahnsite-(CaMnMn)

Overview

CaMn+2Mn+22Fe+32(PO4)4(OH)2·8(H2O)
Fluorescence: none	Not Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	2.78 g/cc
Hardness - Mohs	Jahnsite-(CaMnMn) - 4  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	brown yellow
Streak	white

Crystal Properties

Property	Value
Crystal structure	monoclinic - prismatic
Cleavage	poor
Tenacity	brittle
Fracture	brittle
Luster	vitreous, glassy

Similar Minerals

Dana Number : 42.11.02.03

Class: 42

Group: 42.11

Subgroup: 42.11.02 - jahnsite

Dana Number	Mineral Name	Formula
42.11.02.03	jahnsite-(CaMnMn)	CaMn+2Mn+22Fe+32(PO4)4(OH)2·8(H2O)

Nickel-Strunz Number : 08.DH.15

Group : 08

Subgroup : DH

Nickel-Strunz Number	Mineral Name	Formula
08.DH.15	jahnsite-(CaMnMn)	CaMn+2Mn+22Fe+32(PO4)4(OH)2·8(H2O)
08.DH.15	keckite	Ca(Mn,Zn)2Fe+33(PO4)4(OH)3·2(H2O)
08.DH.15	whiteite-(CaFeMg)	Ca(Fe+2,Mn+2)Mg2Al2(PO4)4(OH)2·8(H2O)
08.DH.15	whiteite-(CaMnMg)	CaMn+2Mg2Al2(PO4)4(OH)2·8(H2O)
08.DH.15	whiteite-(MnFeMg)	(Mn+2,Ca)(Fe+2,Mn+2)Mg2Al2(PO4)4(OH)2·8(H2O)

Specimens

Localities

Uses