Phlogopite and Brucite Physical Properties

Phlogopite

Brucite

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1 Physical Properties

1.1 Tenacity

Tough

Sectile

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.78-2.852.39

1 7.18

1.5 Fracture

None, Uneven

Irregular

1.6 Cleavage

Perfect basal (001)

Perfect on {0001}

1.7 Mohs Hardness

2-2.52.5

2 10

1.8 Chemical Composition

Not Available

Mg(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)

Phlogopite and Brucite Chemical Formula

While comparing Phlogopite and Brucite 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 Phlogopite and Brucite chemical formula.

Chemical formula of Brucite- Mg(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)

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Phlogopite and Brucite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Phlogopite and Brucite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Phlogopite and Brucite Optical Properties during the identification of gemstone. Specific gravity of Phlogopite is 2.39 whereas that of Brucite is 2.39.