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Structural study of ND4Br at high pressure |
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| Authors: | D. P. Kozlenko V. P. Glozkov B. N. Savenko V. A. Somenkov S. Hull |
| Affiliation: | 1. Frank Laboratory of Neutron Physics, JINR , 141980, Dubna Moscow Reg., Russia;2. Russian Ressian Research Center “Kurchatov Institute” , 123182, Moscow, Russia;3. ISIS Facility, Rutherford Appleton Laboratory , Chilton, Didcot, Oxon OXII OQX, UK |
| Abstract: | Abstract A structure of ND4Br has been studied at pressures up to 9 GPa by means of time-of-flight neutron diffraction. A phase transition to the high pressure phase V was observed at P=8·2(5)GPa. It was found that the phase V has a tetragonal structure with an antiparallel ordering of ammonium ions, space group P4/nmm which is in strong resemblance with low temperature modification ND4Br(III). Deuterium positional parameter as a function of pressure was obtained. |
| Keywords: | Neutron diffraction High pressure Ammonium bromide |