Erythrite and Catapleiite Physical Properties

Erythrite

Catapleiite

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1 Physical Properties

1.1 Tenacity

Sectile

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.062.72

1 7.18

1.5 Fracture

Sectile Curved shavings or scrapings produced by a knife blade, (e.g. graphite).

Brittle, Metallic, Brittle, Metallic

1.6 Cleavage

Perfect on {010}; poor on {100} and { 1 02}.

{110} Perfect, {010} Perfect

1.7 Mohs Hardness

Not Available5-6

2 10

1.8 Chemical Composition

Co3(AsO4)2•8(H2O)

Na 2ZrSi 3O 9 · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

Erythrite and Catapleiite Chemical Formula

While comparing Erythrite and Catapleiite 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 Erythrite and Catapleiite chemical formula.

Chemical formula of Erythrite- Co3(AsO4)2•8(H2O)
Chemical formula of Catapleiite- Na 2ZrSi 3O 9 · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

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Erythrite and Catapleiite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Erythrite and Catapleiite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Erythrite and Catapleiite Optical Properties during the identification of gemstone. Specific gravity of Erythrite is 2.72 whereas that of Catapleiite is 2.72.