Elbaite and Pyromorphite Physical Properties

Elbaite

Pyromorphite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.90-3.106.5-7.1

1 7.18

1.5 Fracture

Uneven, Conchoidal, Brittle, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle

Uneven, ConchoidalArthur Thomas, Brittle, Metallic

1.6 Cleavage

Poor/indistinct on {1120} and {1011}

Imperfect- [10 1 1]

1.7 Mohs Hardness

73.5-4

2 10

1.8 Chemical Composition

Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) More from other references

Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)

Elbaite and Pyromorphite Chemical Formula

While comparing Elbaite and Pyromorphite 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 Elbaite and Pyromorphite chemical formula.

Chemical formula of Elbaite- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) More from other references
Chemical formula of Pyromorphite- Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)

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Elbaite and Pyromorphite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Elbaite and Pyromorphite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Elbaite and Pyromorphite Optical Properties during the identification of gemstone. Specific gravity of Elbaite is 6.5-7.1 whereas that of Pyromorphite is 6.5-7.1.