SULPHIDE SOLID SOLUTION HAVING ROCK-SALT STRUCTURE AND METHOD OF PRODUCING THE SAME

摘要

This invention provides a sulphide solid solution which is expressed by the general formula (Cd, A)S in which A is at least one element selected from the group consisting of Yb, Cr, Mg, Sr, Ca, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Lu, Y, Pb, Sn and Ge and which has a rock-salt structure under normal atmospheric pressure, and a method of producing the same. This sulphide solid solution is prepared by mixing the above constitutional elements, namely Cd, A and S, in the form of simple elements or in the form of sulphides of Cd and A to have a composition corresponding to said formula, holding the mixture under high temperature and high pressure conditions, lowering the temperature to room temperature and then lowering the pressure to normal atmospheric pressure.