Abstract
Coordination analysis of Al using AlKα shifts and profile changes was studied by measuring of AlKα of several Al compounds with a high resolution two-crystal spectrometer. A method was established to discriminate mixed coordinated state Al from simply coordinated state Al by means of profile changes and shifts of AlKα. The shift of Kα for 5-coordinate component of Al in andalusite and the result of molecular orbital analysis revealed that the energy of AlKα from 5-coordinated Al occupies an intermediate region between 4-and 6-coordinate regions. Based on these shift data, the following results were obtained. Sillimanite has 6-and 4-coordinated Al instead of 5-coordinated Al, CaO⋅6Al2O3 has 5-and 6-coordinated Al with dominant 5-coordinated Al. Peak separation by a non-linear least square method had proved to be useful for quantitative coordination analysis.
