Electrical and structural properties of some ternary chalcogenides of titanium

Electrical resistivity and Seebeck coefficient measurements have shown the six compounds MTi2X4(M = Fe,Co,Ni; X = S,Se) to exhibit metallic behavior. This is accounted for on the basis of direct Ti-Ti overlap. At room temperature, these compounds all have the monoclinic Cr3S4-type structure (space g...

Full description

Saved in:
Bibliographic Details
Published inThe Journal of physics and chemistry of solids Vol. 29; no. 11; pp. 1935 - 1940
Main Authors Plovnick, R.H., Perloff, D.S., Vlasse, M., Wold, A.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.11.1968
Online AccessGet full text

Cover

More Information
Summary:Electrical resistivity and Seebeck coefficient measurements have shown the six compounds MTi2X4(M = Fe,Co,Ni; X = S,Se) to exhibit metallic behavior. This is accounted for on the basis of direct Ti-Ti overlap. At room temperature, these compounds all have the monoclinic Cr3S4-type structure (space group 12/m), which is characterized by ordered vacancies in alternate metal layers. A reversible temperature-dependent transformation to a disordered trigonal structure (space group P3ml) has been shown to occur for NiTi2S4 and NiTi2Se4 at approximately 340°K. The resistivity plots for both compounds show an increase in the resistivity at approximately the same temperature. This change in resistivity is a result of the disordering of the vacancies in the structure.
ISSN:0022-3697
1879-2553
DOI:10.1016/0022-3697(68)90044-9