ChemInform Abstract: New Ternary Transition Metal Chalcogenides AM2X2 (A: K, Rb, Cs; M: Co; A: K, M: Ni; X: S, Se): Magnetically Ordered Metals with the ThCr2Si2‐type Structure.

Abstract The potassium compounds KM 2 X 2 (M: Co, Ni; X: S, Se) are synthesized by reaction of K metal with the corresponding MX compound (750 °C, 3‐4 d).