Karst

• K-P-Te
• P-Rb-Se
• Ag-Ge-Na-Se
• B-Ba-Eu-N
• optical properties
• phonons
• structural properties
• vibrational spectra
• electronic and electrical properties
• alkali
• chalcogen
• pnictogen
• non-disordered
• conductor
• monoclinic
• orthorhombic
• cubic