Packing with the tetrahedra of sulphur atoms about p-component atoms within the buildings on the AgGaS2, AgGaGeS4 and KGaGeS4 compounds.The thermal Houses of orthorhombic AgGaGeS4 and chalcopyrite AgGaS2 crystals such as thermal growth, specific warmth and thermal conductivity happen to be investigated. For AgGaS2 crystal, we have precisely identif