Afghanite and Poldervaartite Physical Properties

Afghanite

Poldervaartite

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1 Physical Properties

2.1 Tenacity

Not Available

2.3 Solubility

Not Available

2.5 Durability

Not Available

2.7 Specific Gravity

2.55-2.652.91

1 7.18

2.9 Fracture

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle, Conchoidal, Brittle

Handbook of mineralogy (2001)

2.11 Cleavage

Perfect {10 1 0}

None

2.13 Mohs Hardness

5.5-6Not Available

2 10

2.15 Chemical Composition

(Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)

(Ca,Mn2+ ) 2(SiO 3OH)(OH)Anthony et al , Handbook of Mineralogy (2001)

Afghanite and Poldervaartite Chemical Formula

While comparing Afghanite and Poldervaartite 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 Afghanite and Poldervaartite chemical formula.

Chemical formula of Afghanite- (Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)
Chemical formula of Poldervaartite- (Ca,Mn2+ ) 2(SiO 3OH)(OH)Anthony et al , Handbook of Mineralogy (2001)

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Afghanite and Poldervaartite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Afghanite and Poldervaartite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Afghanite and Poldervaartite Optical Properties during the identification of gemstone. Specific gravity of Afghanite is 2.91 whereas that of Poldervaartite is 2.91.