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Calcined magnesite: Calcined magnesite, passing 97% (minimum) through 150 micron and 95% (minimum) through 75 micron IS sieves, having magnesium oxide (MgO), per cent by mass 87 (minimum), calcium oxide (CaO), per cent by mass 2⋅5 (maximum), carbon dioxide (CO2), per cent by mass 2⋅5 (maximum), loss on ignition (CO2 and H2O), per cent by mass 8 (maximum), total contents of MgO, CaO, Al2O3, SiO2 and loss on ignition, per cent by mass 99⋅5 (minimum). |
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