Packing of the tetrahedra of sulphur atoms all-around p-component atoms during the constructions from the AgGaS2, AgGaGeS4 and KGaGeS4 compounds.It can be demonstrated that 2% Yb: CaGdAlO4 (referred to as CAlGO) offers favorable thermomechanical properties having a significant calculated thermal conductivity and is comparable to garnets and sesquio