|
|||||
|
|
Neutron studies of the structure and dynamics of Rb1 ? x (NH4)xI mixed crystals |
|
| Authors: | L S Smirnov I Natkaniec B N Savenko D P Kozlenko S E Kichanov M Dlouha S Vratislav M L Martinez-Sarrion L Mestres M Herraiz L A Shuvalov |
| Institution: | (1) Institute of Theoretical and Experimental Physics, Moscow, 117218, Russia;(2) Joint Institute for Nuclear Research, Dubna, Moscow oblast, 141980, Russia;(3) Niewodniczanski Institute of Nuclear Physics, Krakov, 31-342, Poland;(4) Faculty of Nuclear Science and Physical Engineering, Department of Solid State Engineering, Prague, Czech Republic;(5) Departament de Quimica Inorganica, Universitat de Barcelona, Barcelona, 08028, Spain;(6) Shubnikov Institute of Crystallography, Russian Academy of Sciences, Leninskii pr. 59, Moscow, 119333, Russia |
| Abstract: | The structural and dynamical properties of the x-T phase diagram of the system of Rb1 ? x (NH4)xI mixed crystals is of great interest, because such solid solutions are almost free of internal stresses due to almost equal ionic radii of ammonium and rubidium. The x-T phase diagram of Rb1 ? x (NH4)xI is studied on samples with ammonium concentration ranging from 0.01 to 0.73 over the temperature range from 15 to 300 K by the methods of powder neutron diffraction and inelastic incoherent neutron scattering. The results obtained by powder neutron diffraction show that the α-β phase transition at low temperature is rather extended and occurs at the ammonium concentrations x = 0.50 and 0.66. The region of orientational state glass is determined by inelastic incoherent neutron scattering at the concentrations x = 0.29 and 0.40 at the temperature T = 20 K. |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ | |