Chalcogen, Pnictogen, H-P, Tetragonal

• H-K-O-P
• H-N-O-P
• H-O-P-Rb
• H-K-N-O-P
• H-N-O-P-Rb
• thermal and thermodynamic properties
• electronic and electrical properties
• structural properties
• phase transitions
• mechanical properties
• pnictogen
• chalcogen
• orthophosphate
• disordered