Gibbsite and Vivianite Physical Properties

Gibbsite

Vivianite

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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

2.352.64-2.70

1 7.18

1.5 Fracture

Fibrous, Difficult, Fibrous

(e.g. graphite).

1.6 Cleavage

{001} Perfect

{010} Perfect

1.7 Mohs Hardness

2.5-3Not Available

2 10

1.8 Chemical Composition

Al(OH)3

Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.

Gibbsite and Vivianite Chemical Formula

While comparing Gibbsite and Vivianite 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 Gibbsite and Vivianite chemical formula.

Chemical formula of Gibbsite- Al(OH)3
Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.

Compare Grey Gemstones

Gibbsite Vs Pallasite

Gibbsite Vs Vanadinite

Gibbsite Vs Galena

Gibbsite and Vivianite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gibbsite and Vivianite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gibbsite and Vivianite Optical Properties during the identification of gemstone. Specific gravity of Gibbsite is 2.64-2.70 whereas that of Vivianite is 2.64-2.70.