High pressure X-ray diffraction and electrical resistance study of the quasi- one-dimensional sulfide InV6S8

摘要

The ambient structural details and the results of room temperature high pressure angle dispersive X-ray diffraction and electrical resistance measurements on the quasi-one-dimensional sulfide, InV6S8, to a pressure of 25 GPa are reported. The material does not undergo a phase transition in this pressure range, though an anomaly in the c/a ratio has been observed around 10 Gpa. A fit of the Murnaghan equation of state to the V/V-0 versus pressure data, with the value of the derivative of B-0 with respect to pressure, B'(0), fixed at 4 has yielded a value of the bulk modulus, B-0, of 110 GPa. We also present data of the pressure dependence of the lattice constants, a and c, the ratio c/a, and the resistance at room temperature. (C) 2004 Elsevier Ltd. All rights reserved.