SYNTHESIS OF LOW-ENERGY ION SCATTERING SPECTRA FOR MAGNESIUM ALUMINATE AND MAGNESIUM-SILICATE BY AN INTERACTIVE COMPUTER-PROGRAM

An interactive computer program is used to synthesize ion scattering (ISS) spectra for the mixed oxides MgAl2O4 (spinel) and Mg2SiO4 (forsterite) from the constituent binary oxides MgO, Al2O3, and SiO2. The synthesis scheme indicates that variations in relative cation/anion scatter intensities with change in primary beam energy are observed in both binary and ternary oxides. ISS results from the binary oxides suggest that the magnitude of atom shielding effects in ionic compounds may be dependent upon the ability of a particular cation to be accommodated interstitially in the anion lattice. The order of relative scatter sensitivities for cations in the binary oxides MgO, α -Al2α 3, and Siα 2 was found to be Mg >Al > Si, which supports this model. © 1979, American Chemical Society. All rights reserved.