Ettringite and Mottramite Physical Properties

Ettringite

Mottramite

Add ⊕

1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Partially soluble in water

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

1.775.9

1 7.18

1.5 Fracture

Not Available

Sub-Conchoidal, Brittle, Metallic

1.6 Cleavage

Perfect on {10 1 0}

None observed

1.7 Mohs Hardness

2-2.53

2 10

1.8 Chemical Composition

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

Not Available

Ettringite and Mottramite Chemical Formula

While comparing Ettringite and Mottramite 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 Mottramite chemical formula.

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

Compare Yellow Gemstones

Ettringite Vs Gadolinium Gallium Garnet

Ettringite Vs Forsterite

Ettringite Vs Garnet

Ettringite and Mottramite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ettringite and Mottramite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ettringite and Mottramite Optical Properties during the identification of gemstone. Specific gravity of Ettringite is 5.9 whereas that of Mottramite is 5.9.