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Calcium oxide.Calcium GOST 8877-76 oxide pure, chemically reactants. White powder or small transparent cubic crystals, square of 3,37 g/cm3. T. square of 2560-2600 °C, t. kip. 2850 °C. On air the reactant attracts moisture and CO2, passing with significant increase in volume into Ca(OH)2 and further into CaCO3. Crystal CaO gives in to effect of water and CO2 less.
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