Aliev, Microhardness, Rare earth, Sulfide

• Bi-Pr-S
• O-S-Sb-Sm
• Cd-Er-S
• Nd-O-S-Sb
• Ca-Ga-La-S
• sulfide
• rare earth
• chalcogen
• lanthanoid
• ternary
• monoclinic
• tetragonal
• hexagonal
• orthorhombic
• cubic