Hydrotalcite

Overview

Mg6Al2(CO3)(OH)16·4(H2O)
Fluorescence: none	Not Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	2.06 g/cc
Hardness - Mohs	Hydrotalcite - 2  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	colorless, white
Streak	white

Crystal Properties

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

Similar Minerals

Dana Number : 16b.06.02.01

Class: 16b

Group: 16b.06

Subgroup: 16b.06.02 - sjorgrenite-hydrotalcite

Dana Number	Mineral Name	Formula
16b.06.02.01	hydrotalcite	Mg6Al2(CO3)(OH)16·4(H2O)
16b.06.02.02	stichtite	Mg6Cr2(CO3)(OH)16·4(H2O)
16b.06.02.03	pyroaurite	Mg6Fe+32(CO3)(OH)16·4(H2O)
16b.06.02.04	desautelsite	Mg6Mn+32(CO3)(OH)16·4(H2O)

Nickel-Strunz Number : 05.DA.50

Group : 05

Subgroup : DA

Nickel-Strunz Number	Mineral Name	Formula
05.DA.50	desautelsite	Mg6Mn+32(CO3)(OH)16·4(H2O)
05.DA.50	hydrotalcite	Mg6Al2(CO3)(OH)16·4(H2O)
05.DA.50	pyroaurite	Mg6Fe+32(CO3)(OH)16·4(H2O)
05.DA.50	stichtite	Mg6Cr2(CO3)(OH)16·4(H2O)
05.DA.50	takovite	Ni6Al2(OH)16(CO3,OH)·4(H2O)

Specimens

Localities

Uses