Vibrational study of phase transitions and conductivity mechanism in H3OUO2PO4.3 H2O (HUP)期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Vibrational study of phase transitions and conductivity mechanism in H₃OUO₂PO₄.3 H₂O (HUP)

Authors:	Ph. Colomban M. Pham Thi A. Novak

Affiliation:	1. Groupe de Chimie du Solide, L.P.M.C., Ecole Polytechnique, 91128 Palaiseau France;2. Laboratiore de Physico-Chimie et Dispositifs Ioniques, L.C.R. Thomson-CSF, 91401 Orsay France;3. Laboratoire de Spectrochimie Infrarouge et Raman, C.N.R.S., 2 rue Henri Dunant, 94320 Thiais France

Abstract:	Infrared and Raman spectra of polycrystalline H₃OUO₂PO₄.3 H₂O (HUP) have been envestigated at various temperatures between 50 K and 300 K. The most temperature sensitive bands corresponding to PO₄ and H₂O librations, U-OPO₃ stretching and OH stretching vibrations indicate four different phases of HUP and allow to propose a phase transition mechanism from a quasiliquid state of protonated species in R.T. phase to a fully ordered crystal below 100 K. Protonic conductivity mechanism of room and low temperature phases is discussed.

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