Alkali, Pnictogen, Dnaufl

• Cr-K-Nb-O-P
• K-O-P-Ti
• Mn-Na-O-P
• K-Mn-O-P
• Fe-Na-O-P
• structural properties
• optical properties
• phonons
• wavenumber of optical phonon
• refractive index
• chalcogen
• alkali
• pnictogen
• transitional
• quinary
• orthorhombic
• monoclinic
• trigonal
• tetragonal
• triclinic