Sn x Sb 20 Se 80− x chalcogenide alloys (with x= 8, 10, 12, 13.5, 15, 16.5 and 18 at.%) were prepared by the melt quenching technique. The average coordination number and the overall mean bonding energy were calculated. The x-ray diffraction studies revealed that the alloys with x= 8 and 10 at.% were amorphous and the alloy with x= ... إقراء المزيد