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ATOMITE Calcium Carbonate
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Calcium carbonate
1317-65-3
ATOMITE is a fine ground natural calcium carbonate available in either dry or slurry form.
ATOMITE has been the choice of formulators and compounders for a high brightness, controlled particle size, easy dispersing calcium carbonate.
Typical Physical Characteristics:
Mean Particle Size: Microns: 3.0
Hegman Fineness: 6.0
Dry Brightness: Hunter D-25: 95
Surface Area: BET-m 2/gm: 2.8
pH: 5% Slurry: 9.3-9.9
Specific Resistance: ohm-cm: 20,000
Apparent Dry Bulk Density:
Loose: Ibs/ft 3: 45
Compacted: Ibs/ft 3: 72
Powder Bulk Ratio: 0.43
Oil Absorption: Rubout: 15
Typical Chemical Analysis (Wt. %):
Moisture: 0.2 max.
Calcium Carbonate-CaCO3: 97.6
Magnesium Carbonate-MgCO3: 1.5
Aluminum Oxide-Al2O3: 0.18
Iron Oxide-Fe2O3: 0.08
Silicon Dioxide-SiO2: 0.30
Manganese Oxide-MnO: 0.004
Heavy Metals-Less than 40 ppm
Physical Properties of Natural CaCO3: (Reference Values):
Specific Gravity: 2.71
Density: Ibs/ft 3: 169
Wt. per Solid Gallon: 22.57
Bulking Value: one lb bulks: 0.0443 gals.
Specific Heat: cal/gm/C: 0.2
Coefficient of Linear Expansion:
in/in/C (0-100C): 9-12 x 10 -6
Index of Refraction: Mean: 1.59
Hardness: Mohs: 3.0
Industrial field others
UNOCAL CHEMICALS DIVISION.
Phone (800)-CHEMS-76
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Address 1345 N. Meacham Rd. Schaumburg, IL 60196
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