Tolerance Factor Approach for the Design of Quaternary Materials as Applied to the ALnCuQ Homologous Series.

The design of novel quaternary materials can be a chemically challenging endeavor. Here, we show that a new tolerance factor, we herein call the quaternary tolerance factor (QTF), akin to the Goldschmidt ratio, can be applied to a homologous series of quaternary materials to aid in the prediction of structural stability in new phases. Single crystals of nine new members of the CuQ homologous series were synthesized ( = K, Rb, Cs, = Sm, Gd, Tb, Dy, Er, Yb, Lu, = S, Se) for = 1, 2, and 3 using a reactive KCl flux method as the sole potassium source.

Quasi-2D-Ising-type magnetic critical behavior in trigonal Cr1.27Te2.

Single crystal Cr1.27Te2 samples were synthesized by using the chemical vapor transport method. Single crystal x-ray diffraction studies show a trigonal crystal structure with a P3̄m1 symmetry space group.