Wollastonite
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Wollastonite is a calcium inosilicate mineral that may contain small amounts of iron, magnesium, and manganese substituting for calcium. It is usually white. It forms when impure limestone or dolomite
Wollastonite USGOV
White acicular crystals of wollastonite (field of view 8 mm) from the Central Bohemia Region, Czech Republic
Wollastonite skarn with diopside (green), andradite garnet (red) and vesuvianite (dark brown) from the Stanisław mine near Szklarska Poręba, Izerskie Mountains, Lower Silesia, Poland.
Triclinic crystal system
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In crystallography, the triclinic crystal system is one of the seven crystal systems. A crystal system is described by three basis vectors. In the triclinic system, the crystal is described by vectors
Wollastonite
…metamorphosed by a dike, which results in the formation of wollastonite in the sandstone as a result of outward migration of Ca. Wollastonite crystallizes triclinically in space group P1 with the lattice constants a = 7.94 Å, b = 7.32 Å, c = 7.07 Å; α = 90,03°, β = 95,37°, γ = 103,43° and six formula units per unit…
Microcline, an example of the triclinic crystal system