We propose to make the first detailed structural study of some polymorphs of gallium oxide that remain poorly characterised and yet have applications in catalysis and are used as reactive precursors for zeolite crystallisation. Since the materials are poorly crystalline we propose to use the high Q-range of GEM to obtain data suitable for pair distribution function analysis. The data measured here will be complemented by results from a variety of other techniques in the laboratory. The work forms part of the training of a student supported by the STFC CMPC, and will allow us to analyse the structures of some disordered binary oxides before embarking on the investigation of some more complex aluminosilicate phases. The proposal forms part of the PI's wider interest in the structural characterisation of complex inorganic materials.