This work was done using the X-ray absorption spectroscopy (XAS) beamline at the Australian Synchrotron located in Melbourne. Experiments were carried out in the energy range of 10–40 keV using an Si (311) monochromator and a beam size on the sample of about 0.25 × 0.25 mm2 and a photon flux of about 1011 ph/s. Data on X-ray transmission (I/Io) were collected in an ionisation chamber after the sample and compared to the incident beam flux. For each sample, 20 readings were recorded at each energy level. To normalise the data collected, readings were also recorded for an empty sample holder. The average I/Io was calculated and plotted as a function of filler loadings (WO3 vol%) for each synchrotron radiation energy. The X-ray transmission (I/Io) was related to the linear attenuation coefficient (μ) and the thickness of the samples (t) through Eq. (1):