Wollastonite - Sio2 51â±2%, Cao 40â±2%, Whiteness 85â±2% | High Brightness, Low Moisture Absorption, Versatile Industrial Applications

Supported by huge market experience, we are the famous Exporter, Supplier & Trading Company of Wollastonite in Xian, Shaanxi, China.
FEATURES AND BENEFITS
Wollastonite is a calcium inosilicate mineral (CaSiO3) that may contain small amounts of iron, magnesium, and manganese substituting for calcium. It is usually white. It forms when impure limestone or dolostone is subjected to high temperature and pressure sometimes in the presence of silica-bearing fluids as in skarns or contact metamorphic rocks. Associated minerals include garnets, vesuvianite, diopside, tremolite, epidote, plagioclase feldspar, pyroxene and calcite.
Some of the properties that make wollastonite so useful are its high brightness and whiteness, low moisture and oil absorption, and low volatile content. Wollastonite is used primarily in ceramics, friction products (brakes and clutches), metalmaking, paint filler, and plastics.
Despite its chemical similarity to the compositional spectrum of the pyroxene group of mineralsa where magnesium and iron substitution for calcium ends with diopside and hedenbergite respectivelya it is structurally very different, with a third SiO4 tetrahedron in the linked chain (as opposed to two in the pyroxenes).

TECHNICAL SPECIFICATIONS
ITEMSpecifications
Whiteness 85A 2
SiO2,%51A 2
CaO,%40A 2
Al2O3,%0.4A 0.3
Fe2O3,%0.3A 0.3
MnO,%0.02 Max
T2O,%0.02 Max
Loss on Ignition4A 2
Particle size (D95)200-325 mesh