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NYAD 325 Wollastonite
Fillers and Extenders
Wollastonite
Typical Properties:
Appearance: Brilliant white
Shape: Acicular
Molecular weight: 116
Specific gravity: 2.9
Refractive index: 1.63
pH (aqueous solution): 9.9
Water solubility (gms./100cc): 0.0095
Density (lbs./solid gallons): 24.2
Bulking value (gal./lbs.): 0.0413
Moh's hardness: 4.5
Coefficient of expansion (in/in/C): 6.5x10 -6
Melting point (C): 1540
Chemical Composition CaSiO3:
Component:
CaO: 47.0%
SiO2: 50.0
Fe2O3: 0.5
Al2O3: 1.0
MnO: 0.1
MgO: 0.3
TiO2: 0.05
Typical Values:
Brightness: G.E. Brightness: 92
Oil Absorption: ml/100 grams: 18
Fineness of Grind: Hegman: 2-3
Bulk Density:
Loose: lbs./cu.ft.: 45
Tapped: lbs./cu.ft.: 70
Aspect Ratio: Ratio L/D: 5:1
Surface Area: m 2/gm: 1.55
Minus 325 mesh screen: %: 99.0
Moisture: %: 0.20
Loss on Ignition: %: 0.30
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UNOCAL CHEMICALS DIVISION.
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