Abstract: | The crystallisation of alcaline-earth metal metalsilicates was studied by slow cooling of saturated solutions in the metal chloride melts at T0 = 830° to 1300°C, down to ambient temperature; cooling rates were varied from 20° to 200°C hr−1. Calcium metasilicate crystallised as β-CaSiO3 prisms, strontium metasilicate as α-SrSiO3 platelets and barium metasilicate as α-BaSiO3 platelets. Final crystal lengths increased with reduction in cooling rate and with increase in initial crystallisation temperature. |