Phosphosiderite and Sillimanite Physical Properties

Phosphosiderite

Sillimanite

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1 Physical Properties

1.1 Tenacity

Not Available

Tough

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.74-2.763.20-3.26

1 7.18

1.5 Fracture

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

Splintery

1.6 Cleavage

{010} Perfect, {001} Distinct

{010} perfect

1.7 Mohs Hardness

3.5-46-7.5

2 10

1.8 Chemical Composition

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

Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

Phosphosiderite and Sillimanite Chemical Formula

While comparing Phosphosiderite and Sillimanite 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 Phosphosiderite and Sillimanite chemical formula.

Chemical formula of Phosphosiderite- Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)
Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

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Phosphosiderite and Sillimanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Phosphosiderite and Sillimanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Phosphosiderite and Sillimanite Optical Properties during the identification of gemstone. Specific gravity of Phosphosiderite is 3.20-3.26 whereas that of Sillimanite is 3.20-3.26.