Non-linear optics, Quaternary

• H-K-O-P
• B-K-Nb-O
• B-Ca-Gd-O
• Ba-Mo-O-Te
• K-O-P-Ti
• non-linear optical properties
• second-harmonic generation
• quaternary
• chalcogen
• nonmetal
• non-disordered
• transitional
• orthorhombic
• monoclinic
• trigonal
• tetragonal
• hexagonal