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Diameter, mm (1mm - 0,039inch)

Wollastonite mineral - You can buy these samples

Wollastonite is a mineral of the silicate class, which is distinguished by chemical purity and is formed during contact and deep metasomatism of limestones. May form large aggregations. It is used as a substitute for asbestos, ceramics production, metallurgy, etc. It was also used in the thermal protection of the Buran reusable spacecraft.

You can see wollastonite stone for sale and buy it in the Minerals of Russia online store.

Physical properties of Wollastonite

Category Inosilicate mineral
(repeating unit)
Calcium metasilicate, CaSiO3
IMA symbol Wo
Strunz classification 9.DG.05
Crystal system Triclinic
Monoclinic polytype exists
Crystal class Pinacoidal (1)
(same H-M symbol)
Space group P1 (1A polytype)
Unit cell a = 7.925 Å, b = 7.32 Å,
c = 7.065 Å; α = 90.055°,
β = 95.217°, γ = 103.42°; Z = 6
Formula mass 116.159 g/mol
Color White, colorless or gray
Crystal habit Rare as tabular crystals—commonly massive in lamellar, radiating, compact and fibrous aggregates.
Twinning Common
Cleavage Perfect in two directions at near 90°
Fracture Splintery to uneven
Mohs scale hardness 4.5 to 5.0
Luster Vitreous or dull to pearly on cleavage surfaces
Streak White
Diaphaneity Transparent to translucent
Specific gravity 2.86–3.09
Optical properties Biaxial (-)
Refractive index nα = 1.616–1.640
nβ = 1.628–1.650
nγ = 1.631–1.653
Birefringence δ = 0.015 max
2V angle Measured: 36° to 60°
Melting point 1540 °C
Solubility Soluble in HCl, insoluble in water
Other characteristics Heat of Formation (@298): -89.61kJ
Gibbs Free Energy: 41.78kJ

Code: 2618
Patyn massif, Mountain Shoria, RF

0.00 $ $31.00

Code: 1124
Patyn massif, Mountain Shoria, RF

0.00 $ $32.00

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