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Australian Journal of Chemistry Australian Journal of Chemistry Society
An international journal for chemical science
RESEARCH ARTICLE

Synthesis and Structural Studies of Strontium-Substituted Tricalcium Aluminate Ca3-xSrxAl2O6

A. K. Prodjosantoso, Brendan J. Kennedy and Brett A. Hunter

Australian Journal of Chemistry 53(3) 195 - 202
Published: 2000

Abstract

A series of 27 oxides of the type Ca3–xSrxAl2O6, 3 £ x £ 0, were prepared as polycrystalline powders. The compounds are isostructural with Ca3Al2O6, space group Pa3, and their structures were refined from powder neutron and/or X-ray diffraction data by using the Rietveld method. The evolution of Ca/Sr site occupancies, with x, was determined. It was found that the Ca and Sr cations display strong site selectivity, the smaller Ca 2+ cations preferentially occupying the six-coordinate sites. The relationship between the observed structures and the reactivity of Ca3Al2O6 in Portland cement is discussed.

Keywords: X-Ray diffraction; Rietveld analysis; Portland cement; aluminium oxides.

https://doi.org/10.1071/CH99142

© CSIRO 2000

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