Astrophyllite and Orthoclase Physical Properties

Astrophyllite

Orthoclase

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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

3.2-3.42.54-2.61

1 7.18

1.5 Fracture

Uneven, Brittle, Metallic

Gems, Uneven

1.6 Cleavage

Perfect on [001] imperfect on [100]

Has perfect cleavage on {001} and good cleavage on {010}. Cleavages intersect at 90°.

1.7 Mohs Hardness

2 10

1.8 Chemical Composition

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

KAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Astrophyllite and Orthoclase Chemical Formula

While comparing Astrophyllite and Orthoclase 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 Astrophyllite and Orthoclase chemical formula.

Chemical formula of Astrophyllite- (K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Orthoclase- KAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Astrophyllite and Orthoclase Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Orthoclase Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Orthoclase Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 2.54-2.61 whereas that of Orthoclase is 2.54-2.61.