REFINING STRUCTURAL MODELS FOR GLASSES : IS IT POSSIBLE ? THE CASE OF "Pb2M2F9"

Abstract
A method allowing the fit of interference functions by a least square refinement of atomic positions in a quasicrystalline starting model is presented. Application is made on "Pb2M2F9" fluoride glasses. The crystalline KPbCr2F9 structure appears to give a good possible description of the mean local organization in these glasses

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