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 • GYPSUM

Chemical Name
CaSo42H2O

Types
There are 4 type of Mineralogical varieties of Gypsum.

» ALABASTER
» SALENITE
» SATIN SPAR
» GYPSITE

Properties
Gypsum result from the Molecules of chemically combined water, when heated at 320°F 75% water is expelled leaving semi-hydrated form of Calcium Sulphate.

Usage

» Cement
» Sulphuric Acid
» Ammonium Sulphate
» Paint
» Textiles
» Pet Litter etc.

Chemical Analysis
Chloride 2.5%
Moisture 10%
NaCl 80 - 95%


 • PYROPHILITE

Chemical Analysis
Al2O3 26 - 28.5%
SiO2 62 - 64%
Fe2O3 0.2 - 0.38%
CaO 0.43 - 0.49%
L.O.I3
 6.5 - 6.9
MgO
 Traces


 • QUARTZ

Chemical Analysis
Fe2O3 1.4%
SiO2 99.42%


 • PRECIPITATED - SILICA

Chemical Analysis
  SIL 300 SIL 400
Particle Size 10-25 15-25
Surface Area m2 / G 150-200 125-175
Moisture 105° max (%) 5 5
Ignition Loss gms / cc (%) 8 - 10 8 - 10
Bulk Density gms / cc 0.11 - 0.14 0.08 - 0.11
Ph (5% Soluble) 6.5 - 7.5 6.5 - 7.5
Residue On 325 Mesh (Wet Screen) 0.2 - 0.3 0.2 - 0.3
Soluble Salt max (%) As Na2So4 0.5 0.5
R2O3max 0.3 0.3
SiO2 min 88% 88%
Specific Gravity 1.95 - 2.0 1.95 - 2.0
Refractive Index 1.45 1.45
Water Absorption 200 250

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