Ettringite and Nepheline Physical Properties

Ettringite

Nepheline

Add ⊕

1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Partially soluble in water

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

1.772.55-2.65

1 7.18

1.5 Fracture

Not Available

Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle

1.6 Cleavage

Perfect on {10 1 0}

[1010] Poor

1.7 Mohs Hardness

2-2.55-6

2 10

1.8 Chemical Composition

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

Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.

Ettringite and Nepheline Chemical Formula

While comparing Ettringite and Nepheline 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 Ettringite and Nepheline chemical formula.

Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Nepheline- Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.

Compare Yellow Gemstones

Ettringite Vs Garnet

Ettringite Vs Gadolinium Gallium Garnet

Ettringite Vs Forsterite

Ettringite and Nepheline Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ettringite and Nepheline Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ettringite and Nepheline Optical Properties during the identification of gemstone. Specific gravity of Ettringite is 2.55-2.65 whereas that of Nepheline is 2.55-2.65.