Vivianite and Childrenite Physical Properties

Vivianite

Childrenite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.64-2.703.06-3.25

1 7.18

1.5 Fracture

(e.g. graphite).

Sub-Conchoidal, ConchoidalArthur Thomas, Conchoidal, Uneven

1.6 Cleavage

{010} Perfect

Poor/indistinct on {100}

1.7 Mohs Hardness

Not Available4.5-5

2 10

1.8 Chemical Composition

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

(Fe,Mn)AlPO 4(OH) 2 -H 2OArthur Thomas , Gemstones (2009)

Vivianite and Childrenite Chemical Formula

While comparing Vivianite and Childrenite 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 Vivianite and Childrenite chemical formula.

Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
Chemical formula of Childrenite- (Fe,Mn)AlPO 4(OH) 2 -H 2OArthur Thomas , Gemstones (2009)

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Vivianite and Childrenite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Vivianite and Childrenite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Vivianite and Childrenite Optical Properties during the identification of gemstone. Specific gravity of Vivianite is 3.06-3.25 whereas that of Childrenite is 3.06-3.25.