A new ferromagnetic polymorph of CrSb2 was synthesized under high-pressure-
temperature conditions. The crystal structure is body-centered tetragonal w
ith the space group 14/mcm, namely the CuAl2-type structure. The experiment
s under various pressure conditions revealed that the high-pressure polymor
ph was formed above 5.5 GPa, and the compound crystallized into the low-pre
ssure marcasite-type structure below 5 Gpa. The characteristic of the high-
pressure phase is the metallic bond nature including the formation of Cr-Cr
-Cr linear chain along the c-axis. The compound shows metallic conductivity
and itinerant-electron ferromagnetic behavior with the Curie temperature o
f 160 K. (C) 1999 Elsevier Science S.A. All rights reserved.