Abstract
The structure of the salts ScX3, where X- denotes Cl- or I , was investigated by using neutron diffraction. On heating ScCl3, a phase transition from the FeCl3-type crystal structure to possibly the YCl3-type crystal structure was observed whereas ScIj remained in its room temperature FeCl3-type crystal structure up to the melting point. On melting, there is a reduction in the Sc-X coordination number from six to 4.8(2) for ScCl3 and from six to 4.7(2) for ScI3 and the Sc-Cl and Sc-I nearest-neighbour distances in the liquid are 2.48(2) Å and 2.76(2) Å respectively. The measured total structure factors of molten ScCl3 and ScI3 each have a prominent first sharp diffraction peak at a scattering vector value of 0.75(5) Å-1. The results are discussed in the context of those available for several other trivalent metal halide systems which also melt from the closely related YCl3-type and FeCl3-type crystal structures.
Original language | English |
---|---|
Pages (from-to) | 2171-2177 |
Number of pages | 7 |
Journal | Journal of Physics Condensed Matter |
Volume | 11 |
Issue number | 10 A |
DOIs | |
Publication status | Published - 15 Mar 1999 |
Event | Proceedings of the 1998 Second Workshop on Non-Equilibrium Phenomena in Supercooled Fluids, Glasses and Amorphous Materials - Pisa, Italy Duration: 27 Sept 1998 → 2 Oct 1998 |
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics