Coplanar triangle 3-vertex, Structural properties, Trigonal

• Bi-Fe-O
• N-Na-O
• C-Ca-O
• C-Ca-Mg-O
• O-Pb-Ti-Zr
• thermal and thermodynamic properties
• thermal expansion
• compressibility
• mechanical properties
• chalcogen
• disordered
• non-disordered
• transitional