Huber Hubercarb® G325 Marble Calcium Carbonate Powder

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Huber Hubercarb® G325 Marble Calcium Carbonate Powder
Categories:	Ceramic
Material Notes:	The Hubercarb® G Series calcium carbonate products are mined and processed from a high purity, high brightness marble deposit in Marble Hill, GA, USA and include fine, medium-fine and granular particle sizes. The G Series gives the brightest calcium carbonate for color sensitive applications like joint compound, luxury vinyl tile (LVT), flooring, paints & coatings and stucco. Information provided by Huber Engineered Materials.
Key Words:	CaCO3
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Physical Properties	Original Value	Comments

Specific Gravity	2.70 g/cc	ASTM D-153
Bulk Density	0.800 lb/ft³	Loose; ASTM C-110
	79.0 lb/ft³	Compacted; ASTM C-110
Brightness	15 %	Dry, Hunter Reflectance
Oil Absorption	42 %	ASTM D-281
Solubility in Water	0.0035 % @Temperature 100 °C
Moisture Absorption	0.200 %	ASTM D-280
Particle Size	10.5 µm	Median, SediGraph
	93.5 µm	Median, LLS-CILAS
pH	9.4	saturated solution; ASTM D-1208

Mechanical Properties	Original Value	Comments
Hardness, Mohs	3.0	relatively non-abrasive

Thermal Properties	Original Value	Comments
CTE, linear	4.30 µm/m-°C

Optical Properties	Original Value	Comments
Refractive Index	1.60

Descriptive Properties
Alkalinity	0.4 mg/gm	as NaOH, ASTM D-1208
Color	White
Composition, Calcium Carbonate (%)	96
Composition, Magnesium Carbonate (%)	2.5
Composition, Other (%)	1.1
Composition, Silicas and Silicates (%)	0.4
Particle Shape	Irregular, uniaxial
Water Demand (ml/100g)	52	Water Demand

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EHUBER958 / 293312

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