Cell and atoms, Chalcogen, Non-disordered, Quaternary, Phase transitions

• C-H-N-O
• H-N-O-P
• H-Na-O-P
• H-K-O-P
• B-Ca-H-O
• fusion
• temperature for congruent melting
• quaternary
• chalcogen
• non-disordered
• transitional
• monoclinic
• orthorhombic
• triclinic
• tetragonal
• trigonal