Ettringite and Chalcopyrite Physical Properties

Ettringite

Chalcopyrite

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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

1.774.1-4.3

1 7.18

1.5 Fracture

Not Available

Uneven, Brittle, Metallic

1.6 Cleavage

Perfect on {10 1 0}

Indistinct on {011}

1.7 Mohs Hardness

2-2.53.5-4

2 10

1.8 Chemical Composition

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

CuFeS 2Anthony et al , Handbook of mineralogy (2001)

Ettringite and Chalcopyrite Chemical Formula

While comparing Ettringite and Chalcopyrite 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 Chalcopyrite chemical formula.

Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Chalcopyrite- CuFeS 2Anthony et al , Handbook of mineralogy (2001)

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Ettringite and Chalcopyrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ettringite and Chalcopyrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ettringite and Chalcopyrite Optical Properties during the identification of gemstone. Specific gravity of Ettringite is 4.1-4.3 whereas that of Chalcopyrite is 4.1-4.3.