Londonite and Ettringite Physical Properties

Londonite

Ettringite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

Partially soluble in water

1.3 Durability

Not Available

1.4 Specific Gravity

3.341.77

1 7.18

1.5 Fracture

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

Not Available

1.6 Cleavage

None

Perfect on {10 1 0}

1.7 Mohs Hardness

Not Available2-2.5

2 10

1.8 Chemical Composition

(Cs,K,Rb)Al 4Be 4(B,Be) 12O 28Anthony et al , Handbook of mineralogy (2001)

Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

Londonite and Ettringite Chemical Formula

While comparing Londonite and Ettringite 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 Londonite and Ettringite chemical formula.

Chemical formula of Londonite- (Cs,K,Rb)Al 4Be 4(B,Be) 12O 28Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

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Londonite and Ettringite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Londonite and Ettringite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Londonite and Ettringite Optical Properties during the identification of gemstone. Specific gravity of Londonite is 1.77 whereas that of Ettringite is 1.77.