PYROELECTRIC SPECTROSCOPY OF THE HYDROGEN URANYL PHOSPHATE

Absorption, transmission and reflection properties of hydrogen uranyl phosphate (HUP) are determined, by using pyroelectric (PE) sensors in thermally-coupled (PPE) and thermally-decoupled (conventional ) spectr oscopy configurations. Absorption bands at 1.25, 1.5 and 2.0 mum, stro nger for HUP than for the corresponding ammonium salt, have been obser ved. This can be correlated with the much higher protonic conductivity of HUP and suggests polaronic effects on the conduction mechanism in this solid electrolyte.