Issue 11, 1999

High temperature neutron diffraction studies of phase transformations in NiCr2S4

Abstract

High temperature structural transformations in NiCr2S4 have been investigated by neutron powder diffraction in situ. At 835(5) °C, NiCr2S4 undergoes an order–disorder transition from the monoclinic Cr3S4 structure to a hexagonal cation-deficient NiAs structure. Above the transition temperature, cation vacancies, which at room temperature are ordered in every second cation layer, become statistically distributed between all cation layers. Prior to this structural transition, intralayer disordering of vacancies occurs within the half-occupied layer. This is not sufficiently complete to cause the change to trigonal symmetry which has been reported for binary sulfides.

Article information

Article type
Paper

J. Mater. Chem., 1999,9, 2859-2863

High temperature neutron diffraction studies of phase transformations in NiCr2S4

P. Vaqueiro, S. Hull, B. Lebech and A. V. Powell, J. Mater. Chem., 1999, 9, 2859 DOI: 10.1039/A904492B

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Spotlight

Advertisements