STABLE CA3SIO5 SOLID-SOLUTION CONTAINING MANGANESE AND PHOSPHORUS

The effect of simultaneous addition of varying concentrations of manga nese and phosphorus oxides on a C/S approximate to 3 composition has b een investigated. Mineralogical changes on synthesized powders were id entified by X-ray diffraction, Infra-red spectroscopy and DTA. M3 poly morph's alite formation with Mn and P inclusions less than 0.69 (wt%) Mn2O3 and 0.62 (wt%) P2O5 is shown. The Electron Paramagnetic Resonanc e investigations of synthesized monoclinic C3S show that Mn ions are i n octahedral site as Mn2+ oxidation state. The formed solid solutions could be described with the following cationic vacancies formula: (Ca3 -5X Mn-4X square(X))(Si1-2X P-2X) O-5, With X less than or equal to 0. 005. (C) 1997 Elsevier Science Ltd.