Antigorite and Astrophyllite Physical Properties

Antigorite

Astrophyllite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.58-2.803.2-3.4

1 7.18

1.5 Fracture

Conchoidal, Brittle, Metallic, Conchoidal, Handbook of mineralogy (2001)

Uneven, Brittle, Metallic

1.6 Cleavage

{001} Good

Perfect on [001] imperfect on [100]

1.7 Mohs Hardness

5-5.53

2 10

1.8 Chemical Composition

(Mg,Fe2+ ) 3Si 2O 5(OH) 4Anthony et al , Handbook of mineralogy (2001)

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

Antigorite and Astrophyllite Chemical Formula

While comparing Antigorite 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 Antigorite and Astrophyllite chemical formula.

Chemical formula of Antigorite- (Mg,Fe2+ ) 3Si 2O 5(OH) 4Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Astrophyllite- (K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)

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Antigorite and Astrophyllite Specific Gravity

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