Allanite and Childrenite Physical Properties

Allanite

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

3.40-4.203.06-3.25

1 7.18

1.5 Fracture

Not Available

Sub-Conchoidal, ConchoidalArthur Thomas, Conchoidal, Uneven

1.6 Cleavage

Not Available

Poor/indistinct on {100}

1.7 Mohs Hardness

Not Available4.5-5

2 10

1.8 Chemical Composition

Not Available

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

Allanite and Childrenite Chemical Formula

While comparing Allanite 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 Allanite and Childrenite chemical formula.

Chemical formula of Childrenite- (Fe,Mn)AlPO 4(OH) 2 -H 2OArthur Thomas , Gemstones (2009)

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Allanite and Childrenite Specific Gravity

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