Temperature-dependent neutron diffraction on TiI3

Joachim Angelkort, Anatoliy Senyshyn, Andreas Schönleber, Sander van Smaalen
  • Zeitschrift für Kristallographie, August 2011, De Gruyter
  • DOI: 10.1524/zkri.2011.1370

Low and high temperature crystal structures of TiI3

What is it about?

The linear thermal expansion is highly anisotropic and small along c (i.e. along chains of Ti atoms) in the low-temperature phase, while above Tc it is much larger along c. On heating, thermal expansion of TiI3 is found to increase abruptly at the phase transition at Tc = 323 K.

Why is it important?

The ratio between the long and the short Ti—Ti distances on the metal chains serve as order parameter.

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The following have contributed to this page: Priv.-Doz. Dr. Andreas Schönleber