Comparison of calorimetry and neutron scattering results concerning phase transitions in /Ni(NH3)6/(NO3)2 with the raman band profile study |
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Authors: | J.A. Janik J.M. Janik A. Migdał-Mikuli E. Mikuli T. Stanek |
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Affiliation: | 1. Institute of Nuclear Physics, 31-342 Kraków Poland;2. Institute of Chemistry, Jagiellonian University, 30-060 Kraków Poland |
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Abstract: | Previously obtained calorimetry results revealed an existance of three solid phases in /Ni(NH3)6/(NO3)2. Neutron quasielastic scattering results, also obtained previously, gave evidence of quick reorientations of NH3 groups around NiN axes in phases I and II. In the Raman profile study now reported we show that the NO?3 groups reorient quickly in phase I, whereas they are fixed in phase II. Connection of NH3 and NO?3 reorientations with entropy of I?II transition is discussed. |
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