Astrophyllite and Rossmanite Physical Properties

Astrophyllite

Rossmanite

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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

3.2-3.43

1 7.18

2.5 Fracture

Uneven, Brittle, Metallic

Brittle, Metallic

2.6 Cleavage

Perfect on [001] imperfect on [100]

None

2.7 Mohs Hardness

3Not Available

2 10

2.11 Chemical Composition

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

◻(LiAl 2)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)

Astrophyllite and Rossmanite Chemical Formula

While comparing Astrophyllite and Rossmanite 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 Rossmanite 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 Rossmanite- ◻(LiAl 2)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)

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Astrophyllite and Rossmanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Rossmanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Rossmanite Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 3 whereas that of Rossmanite is 3.