H-N-O-Se, Pnictogen, Pssaba

• H-N-O-Rb-Se
• H-N-Na-O-Se
• phase transitions
• electronic and electrical properties
• structural transitions
• temperature for structural transition
• permittivity (dielectric constant)
• chalcogen
• pnictogen
• nonmetal
• ferroelectric
• tetraoxoselenate
• triclinic
• monoclinic
• trigonal
• orthorhombic