| Calcium Carbonate (CaCO3) |
97.56 |
| Magnesium Oxide (MgO) |
0.54 |
| Aluminium and Iron Oxides (A12O3and Fe2O3) |
0.83 |
| Insoluble residue (chiefly SiO2) |
0.84 |
| Water and loss (H20) |
0.23 |
| Its chief physical properties are : |
|
| Specific gravity |
2.42 |
| Weight per cub. ft. |
68kg. |
| Crushing resistance per sq. ft. |
291.6 tons (Kirkaldy) |
Approximate chemical composition
