Spodumene and Ettringite Physical Properties

Spodumene

Ettringite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

insoluble

Partially soluble in water

1.3 Durability

Not Available

1.4 Specific Gravity

3.15-3.211.77

1 7.18

1.5 Fracture

Uneven, Subconchoidal, Gemstones (2009)

Not Available

1.6 Cleavage

Perfect prismatic, two directions {110} ∧ {1 1 0} at 87°

Perfect on {10 1 0}

1.7 Mohs Hardness

6-72-2.5

2 10

1.8 Chemical Composition

LiAlSi₂O₆

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

Spodumene and Ettringite Chemical Formula

While comparing Spodumene 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 Spodumene and Ettringite chemical formula.

Chemical formula of Spodumene- LiAlSi₂O₆
Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

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Spodumene and Ettringite Specific Gravity

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