Abstract
Thermal expansion of ZnCr2Se4 was investigated from room temperature to 301 degrees C. Zinc chromium selenide, an antiferromagnetic spinel with a helical spin structure and of space group Fd 3m (Oh7), showed unusual behaviour above 340 degrees C on DTA. Thermal expansion of this compound in the temperature range 26-301 degrees C is reported in this paper. The average value of its thermal expansion coefficient in the specified temperature range is found to be 11.69*10-6 degrees C-1.