Shigaite and Ettringite Physical Properties

Shigaite

Ettringite

Add ⊕

1 Physical Properties

1.1 Tenacity

Moderately ﬂexible

Not Available

1.2 Solubility

Not Available

Partially soluble in water

1.3 Durability

Not Available

1.4 Specific Gravity

2.321.77

1 7.18

1.5 Fracture

Flexible Flexible fragments.

Not Available

1.6 Cleavage

Perfect on {0001}

Perfect on {10 1 0}

1.7 Mohs Hardness

22-2.5

2 10

1.8 Chemical Composition

Not Available

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

Shigaite and Ettringite Chemical Formula

While comparing Shigaite 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 Shigaite and Ettringite chemical formula.

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

Compare Yellow Gemstones

Shigaite Vs Zinnwaldite

Shigaite Vs Weloganite

Shigaite Vs Heliotrope

Shigaite and Ettringite Specific Gravity

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