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Phase Transitions of YbBr 2
Author(s) -
Krämer Karl W.,
Keller Lukas
Publication year - 2014
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201400165
Subject(s) - differential scanning calorimetry , rutile , phase transition , melting point , phase (matter) , materials science , neutron diffraction , crystallography , analytical chemistry (journal) , diffraction , powder diffraction , chemistry , thermodynamics , crystal structure , physics , optics , organic chemistry , composite material
The crystalline phases of YbBr 2 were investigated by powder neutron diffraction between 1.5 K and the melting point at 955 K (682 °C). The low temperature SrI 2 phase is observed up to 550 K, the α‐PbO 2 phase between 260 K and 750 K, the CaCl 2 phase between 690 K and 790 K, and the rutile phase from 790 K to the melting point. All observed phase transitions are first order, except for the second order CaCl 2 to rutile transition. The transition temperatures and enthalpies were determined by differential scanning calorimetry.