Melting
and high-temperature solid state transitions in cobalt(II) halides |
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| Authors: | Alina Wojakowska E Krzy?ak Stanis?awa Plińska |
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| Institution: | (1) Department of Inorganic Chemistry, Laboratory of Thermal Analysis, Wrocław Medical University, Wrocław, Poland, 50 139, ul. Szewska 38 |
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| Abstract: | Melting
and high temperature solid-state transitions in CoCl2
and CoBr2 are widely discussed. On the basis of DSC
and conductometric measurements it was found that melting process of CoCl2
is preceded by a solid-state transition appearing about 20 K below the melting
point of CoCl2. Due to deconvolution of the thermograms,
the enthalpy of fusion and that of solid-state transition were found to be
36.4 and 9.6 kJ mol–1, respectively. Melting
points of CoCl2 and CoBr2 were
established to be 999.0 and 949.7 K, respectively. Hitherto unknown enthalpy
of fusion of CoBr2 was determined to be 27.2 kJ mol–1.
A solid-state transition in CoBr2 at 650 K has been
confirmed. |
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| Keywords: | cobalt dibromide cobalt dichloride DSC electrical conductivity enthalpy of fusion solid-state transition |
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