Alkali, Carbonate, Chalcogen, Non-disordered, Temperature for congruent melting

• C-H-Na-O
• C-Na-O
• C-H-Na-O-Y
• C-H-K-O
• C-K-O
• non-disordered
• carbonate
• alkali
• chalcogen
• monoclinic
• hexagonal
• orthorhombic
• triclinic
• trigonal