TOWARD A FULL PARTIAL STRUCTURE OF [[upsilon]]-GeO₂. M.-L. Saboungi, D.L. Price, Argonne National Lab, Argonne, Ill. 60439, and A.C. Barnes, University of Bristol, Department of Physics, Bristol, UK

The acquisition of partial structure information--the structural correlations between all pairs of elements--represents the ultimate goal in analysis of disordered systems. In favorable cases, full information is obtained from neutron diffraction (ND) with isotopic substitution, if suitable isotopes are available, in others from anomalous x-ray diffraction (AXD) if the absorption edges lie at suitable energies. In the least favorable case, one may to resort to a combination of the two methods. We report an analysis of the structural data from such a case, [[upsilon]]-GeO₂. The extracted partial structure factors are presented, with a discussion of present limitations of the method. A comparison with computer simulations will be presented.

This work was supported by the U.S. Department of Energy, Materials Sciences, Basic Energy Sciences, under Contract No. W-31-109-ENG-38