Creedite

Overview

Ca3Al2(SO4)(F,OH)10·2(H2O)
Fluorescence: none	Not Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	2.71 g/cc
Hardness - Mohs	Creedite - 3.5  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	colorless, purple, white
Streak	white

Crystal Properties

Property	Value
Crystal structure	monoclinic - prismatic
Cleavage	perfect
Tenacity	brittle
Fracture	conchoidal
Luster	vitreous, greasy

Similar Minerals

Dana Number : 12.01.04.01

Class: 12

Group: 12.01

Subgroup: 12.01.04 - creedite

Dana Number	Mineral Name	Formula
12.01.04.01	creedite	Ca3Al2(SO4)(F,OH)10·2(H2O)

Nickel-Strunz Number : 03.CG.15

Group : 03

Subgroup : CG

Nickel-Strunz Number	Mineral Name	Formula
03.CG.15	creedite	Ca3Al2(SO4)(F,OH)10·2(H2O)

Specimens

Localities

Uses