Determination of the position of hydrogen in inorganic materials such as zeolites, coordination compounds, H2 storage materials, energy materials, organometallics etc is a crystallographic challenge that we have shown that high flux netron diffractometry can address. We intend to study two areas of hydrogenous materials structural chemistry related to the important area of zeolite function in clinoptilolite. Specifically we wish to (i) define the water and other small molecule positions in clinoptilolite as a function of ion exchange and (ii) investigate the thermal decomposition of clinoptilolite with various cations and map changes in structural features involving hydrogen as a function of confined water content.