Lattice constants of titanomagnetites at high temperatures.

Abstract

Lattice parameter measurements were made at high temperatures of up to 700°C on synthetic titanomagnetite samples with x values of 0.0, 0.3, 0.7, and 1.0. A high temperature X-ray camera was used for the measurement, where heating was made in vacuum. The variation of the lattice constants of the titanomagnetite series (x=0.0-1.0) can be approximated as d[A]=(8.395+8.5×10-5T[°C]+7.5×10-8T2)+(0.14-6.0×10-5T)x, which can be used to identify the chemical change of titanomagnetites and titanomaghemites during the heating of synthetic and natural samples.