Afghanite and Phosphosiderite Physical Properties

Afghanite

Phosphosiderite

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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

2.55-2.65

2.74-2.76

1.5 Fracture

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

UnevenAnthony et al, Handbook of mineralogy (2001), UnevenAnthony et al, Handbook of mineralogy (2001), Uneven

1.6 Cleavage

Perfect {10 1 0}

{010} Perfect, {001} Distinct

1.7 Mohs Hardness

5.5-6

3.5-4

1.8 Chemical Composition

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

Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)

Afghanite and Phosphosiderite Chemical Formula

While comparing Afghanite and Phosphosiderite 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 Phosphosiderite 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 Phosphosiderite- Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)

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Afghanite and Phosphosiderite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Afghanite and Phosphosiderite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Afghanite and Phosphosiderite Optical Properties during the identification of gemstone. Specific gravity of Afghanite is 2.74-2.76 whereas that of Phosphosiderite is 2.74-2.76.