Phase Transitions of YbBr2
2014
The crystalline phases of YbBr2 were investigated by powder
neutron diffraction between 1.5 K and the melting point at 955 K
(682 °C). The low temperature SrI2 phase is observed up to 550 K, the
α-PbO2 phase between 260 K and 750 K, the CaCl2 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 CaCl2 to rutile transition. The transition temperatures and enthalpies
were determined by differential scanning calorimetry.
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