Ettringite and Annabergite Physical Properties

Ettringite

Annabergite

Add ⊕

1 Physical Properties

1.1 Tenacity

Not Available

Sectile

1.2 Solubility

Partially soluble in water

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

1.773.07

1 7.18

1.5 Fracture

Not Available

Brittle, Metallic, Brittle, Metallic, Brittle, Metallic

1.6 Cleavage

Perfect on {10 1 0}

Perfect on {010}, indistinct on {100} and {102}

1.7 Mohs Hardness

2-2.52

2 10

1.8 Chemical Composition

Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

Ni3(AsO4)2•8(H2O)

Ettringite and Annabergite Chemical Formula

While comparing Ettringite and Annabergite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Ettringite and Annabergite chemical formula.

Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Annabergite- Ni3(AsO4)2•8(H2O)

Compare Yellow Gemstones

Ettringite Vs Gadolinium Gallium Garnet

Ettringite Vs Forsterite

Ettringite Vs Garnet

Ettringite and Annabergite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ettringite and Annabergite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ettringite and Annabergite Optical Properties during the identification of gemstone. Specific gravity of Ettringite is 3.07 whereas that of Annabergite is 3.07.