Evidence for a low temperature phase transition in DI-μ-chloro-tetrakis (ethylene diamine) dinickel(II) chloride
✍ Scribed by Y. Journaux; O. Kahn; B. Chevalier; J. Etourneau; R. Claude; A. Dworkin
- Publisher
- Elsevier Science
- Year
- 1978
- Tongue
- English
- Weight
- 347 KB
- Volume
- 55
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
The temperature dependence of the heat capacity for the title compound exhibits a broad peak between 10 and 27 K, with a maximum of 35.3 jou!e mole-' R-' at 22.8 K. This heat capacity variation cannot result onIy from the singIe-ion zero fieId splitting and the interaction between Ni(II) ions. It is suggested that a crystatio~aphie phase transition occurs_ Low temperature X-ray diffraction diagrams confirm that the compound undergoes a monoclinic -triclmic transition The consequences of this transition on the interpretation of the magnetic measurements are discussed.