PHASE-RELATIONSHIPS IN THE QUATERNARY SYSTEMS MNS-CR2S3-IN2S3, FE5-CR2S3-IN2S3, COS-CR2S3-IN2S3, NIS-CR2S3-IN2S3 MISCIBILITY GAPS IN SPINEL SOLID-SOLUTIONS

In the phase diagrams of the spinel type MCr//2S//4-MIn//2S//4 solid solution series with M equals Mn, Fe, Co, Ni, immiscibility domes exist. The mixed crystals obtained at higher temperatures can be quenched to ambient temperature without decomposition. The reaction rates of forming and especially of decomposing the quaternary solid solutions are very low.