Portlandite

Overview

Ca(OH)2
Fluorescence: none	Not Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	2.23 g/cc
Hardness - Mohs	Portlandite - 2.5-3.0  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	colorless
Streak	white

Crystal Properties

Property	Value
Crystal structure	trigonal - hexagonal scalenohedral
Cleavage	perfect
Tenacity	brittle
Fracture	brittle
Luster	pearly

Similar Minerals

Dana Number : 06.02.01.04

Class: 06

Group: 06.02

Subgroup: 06.02.01 - brucite

Dana Number	Mineral Name	Formula
06.02.01.01	brucite	Mg(OH)2
06.02.01.03	pyrochroite	Mn(OH)2
06.02.01.04	portlandite	Ca(OH)2

Nickel-Strunz Number : 04.FE.05

Group : 04

Subgroup : FE

Nickel-Strunz Number	Mineral Name	Formula
04.FE.05	brucite	Mg(OH)2
04.FE.05	portlandite	Ca(OH)2
04.FE.05	pyrochroite	Mn(OH)2

Specimens

Localities

Uses