Chemical Composition (Typical)%
SiO2 -----------------------------------------37.20
FeO------------------------------------------ 29.49
Al2O3--------------------------------------- 20.59
MgO ---------------------------------------- 6.09
Fe2O3-------------------------------------- 3.73
CaO ---------------------------------------- 2.02
MnO------------------------------------------0.64
TiO2------------------------------------------0.25 |
Physical Characteristics (Typical)
Bulk Density------------------------------1.45lbs./ft3
Specific Gravity--------------------------4.0 – 4.1
Hardness (Mohs)----------------------- 8
Melting Point------------------------------1315oC
Grain Shape -------------------------------blocky, sub-angular grains
Colour ---------------------------------------Dark red
Solubility: Insoluble in water and common organic solvents. |
Other Characteristics (Typical)
Conductivity---------------55 microsiemens/cm
Radioactivity--------------Not detectable above background
Moisture ------------------------------------ < 0.10%
Chlorides------------------------------------ <1ppm
Free Iron------------------------------------- < 0.01%
Copper----------------------------------------< 0.01%
Other Heavy Metals----------------------< 0.01%
Sulphur----------------------------------------< 0.01% |