Imerys NYAD® G Special Wollastonite

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Imerys NYAD® G Special Wollastonite
Categories:	Ceramic; Oxide; Silicon Oxide; Other Engineering Material; Additive/Filler for Polymer
Material Notes:	Wollastonite (calcium metasilicate, or CaSiO3) is a naturally occurring white, non-metallic mineral with an acicular or needle-shaped crystal structure. This distinctive property makes wollastonite an ideal performance mineral for a broad range of industrial and consumer applications. .Information provided by NYCO Minerals, subsequently acquired by Imerys.
Key Words:	Calcium Metasilicate, CaSiO₃, CaSiO3
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Physical Properties	Original Value	Comments

Specific Gravity	2.90 g/cc
Bulk Density	23.0 lb/ft³	loose
	45.0 lb/ft³	Tapped
Brightness	85 %	G.E. Brightness
Oil Absorption	47 %
Solubility of Water	0.0095 %
Particle Size	45 µm	D50
pH	9.9	10% Slurry
Molecular Weight	116 g/mol

Mechanical Properties	Original Value	Comments
Hardness, Mohs	4.5

Thermal Properties	Original Value	Comments
CTE, linear	6.50 µm/m-°C @Temperature 20.0 °C
Melting Point	1410 °C	ASTM D1857
	1540 °C	theoretical

Optical Properties	Original Value	Comments
Refractive Index	1.63

Component Elements Properties	Original Value	Comments
Al2O3	0.34 %
CaO	46.21 %
Fe2O3	0.77 %
K2O	0.050 %
Loss on Ignition(%)	0.050 %
MgO	0.38 %
MnO	0.16 %
SiO2	51.6 %
TiO2	0.050 %

Descriptive Properties
Appearance	White
Aspect Ratio (L/D)	20:1
Morphology	Acicular

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CNYCO07 / 1689

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