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Mottramite
Mottramite

Achroite
Achroite



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Mottramite
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Achroite

Mottramite and Achroite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Brittle
Soluble
-
5.9
Sub-Conchoidal
None observed
3
PbCu(VO4)(OH)
 
-
-
-
2.90-3.40
Uneven, ConchoidalWalter Schumann
Indiscernible
7-7.5
Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.

Mottramite and Achroite Chemical Formula

While comparing Mottramite and Achroite 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 Mottramite and Achroite chemical formula.

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Mottramite and Achroite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Mottramite and Achroite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Mottramite Vs Achroite during the identification of gemstone. Specific gravity of Mottramite is whereas that of Achroite is .