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Description
Wollastonite appears as white or slightly cream-colored powder. pH (aqueous slurry) 8.0 to 10.0. (NTP, 1992);DryPowder; PelletsLargeCrystals, OtherSolid;DryPowder
Synonyms
SILICIC ACID CALCIUM SALT;VANFRE IL-2;VANSIL W-20;VANSIL W30;VANSIL(R) G;VANSIL(R) W10;VANSIL W-10;CALCIUM SILICATE
IUPAC Name
calcium;dioxido(oxo)silane
Molecular Weight
116.16g/mol
Molecular Formula
CaO3Si
Canonical SMILES
[O-][Si](=O)[O-].[Ca+2]
InChI
InChI=1S/Ca.O3Si/c;1-4(2)3/q+2;-2
InChI Key
OYACROKNLOSFPA-UHFFFAOYSA-N
Melting Point
2804 °F (NIOSH, 2016)
Density
2.1 at 77 °F (NTP, 1992);CaSiO3 species: 2.92
Solubility
less than 1 mg/mL at 70° F (NTP, 1992);Practically insol in water
Color Form
White to brown, red, gray, yellow solid; vitreous to pearly luster;White monoclinistic crystals
Complexity
18.8
Covalently-Bonded Unit Count
2
Decomposition
When heated to decomposition it emits acrid smoke and fumes.
EC Number
233-250-6;237-772-5
Exact Mass
115.924261g/mol
Formal Charge
0
H-Bond Acceptor
3
H-Bond Donor
0
Heavy Atom Count
5
MeSH Entry Terms
Ca2SiO4;calcium silicate;calcium silicate (CaSiO3);calcium silicate, CaH2SiO3 (1:1) salt;mesoporous amorphous calcium silicate;mineral wool;pseudowollastonite;Wollastonite;xonotlite
Monoisotopic Mass
115.924261g/mol
Other Experimental
Mohs hardness: 4.5-5, density: 2.8-2.9
Refractive Index
INDEX OF REFRACTION: 1.616-1.640 (ALPHA), 1.628-1.650 (BETA), 1.631-1.653 (GAMMA);Ave index of refraction: 1.63
Rotatable Bond Count
0
Vapor Pressure
0 mm Hg (approx) (NIOSH, 2016)
