Brunklaus

• Cu-Ge-S-Zn
• Ag-Al-P-Se
• Ag-Al-P-S
• Cu-Ge-Se-Zn
• Cu-Ge-S-Se-Zn
• structural properties
• chalcogen
• transitional
• quaternary
• metalloid
• pnictogen
• monoclinic
• orthorhombic
• hexagonal