Erythrite and Astrophyllite Physical Properties

Erythrite

Astrophyllite

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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

3.063.2-3.4

1 7.18

1.5 Fracture

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

Uneven, Brittle, Metallic

1.6 Cleavage

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

Perfect on [001] imperfect on [100]

1.7 Mohs Hardness

Not Available3

2 10

1.8 Chemical Composition

Co3(AsO4)2•8(H2O)

(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)

Erythrite and Astrophyllite Chemical Formula

While comparing Erythrite and Astrophyllite 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 Astrophyllite chemical formula.

Chemical formula of Erythrite- Co3(AsO4)2•8(H2O)
Chemical formula of Astrophyllite- (K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)

Compare Red Gemstones

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Erythrite and Astrophyllite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Erythrite and Astrophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Erythrite and Astrophyllite Optical Properties during the identification of gemstone. Specific gravity of Erythrite is 3.2-3.4 whereas that of Astrophyllite is 3.2-3.4.