Sigloite

Overview

Fe+3Al2(PO4)2(OH)3·5(H2O)
Fluorescence: none	Not Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	2.35 g/cc
Hardness - Mohs	Sigloite - 3  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	triclinic - pinacoidal
Cleavage	perfect
Tenacity	-
Fracture	-
Luster	vitreous, pearly

Similar Minerals

Dana Number : 42.11.14.03

Class: 42

Group: 42.11

Subgroup: 42.11.14 - vauxite

Dana Number	Mineral Name	Formula
42.11.14.01	vauxite	Fe+2Al2(PO4)2(OH)2·6(H2O)
42.11.14.03	sigloite	Fe+3Al2(PO4)2(OH)3·5(H2O)
42.11.14.04	gordonite	MgAl2(PO4)2(OH)2·8(H2O)
42.11.14.06	kastningite	(Mn+2,Fe+2,Mg)Al2(PO4)2(OH)2·8(H2O)

Nickel-Strunz Number : 08.DC.30

Group : 08

Subgroup : DC

Nickel-Strunz Number	Mineral Name	Formula
08.DC.30	gordonite	MgAl2(PO4)2(OH)2·8(H2O)
08.DC.30	kastningite	(Mn+2,Fe+2,Mg)Al2(PO4)2(OH)2·8(H2O)
08.DC.30	laueite	Mn+2Fe+32(PO4)2(OH)2·8(H2O)
08.DC.30	sigloite	Fe+3Al2(PO4)2(OH)3·5(H2O)
08.DC.30	stewartite	Mn+2Fe+32(PO4)2(OH)2·8(H2O)
08.DC.30	ushkovite	MgFe+32(PO4)2(OH)2·8(H2O)

Specimens

Localities

Uses