Chalcogen, Fe-Mg-O, Structural properties, Y-x polyhedra

• Al-B-Ca-F-Fe-H-Mg-Na-O-Si
• Al-Ca-Fe-H-Mg-O-Si
• Al-B-Ca-Fe-H-Mg-Na-O-Si-Ti
• Al-B-F-Fe-H-Mg-Na-O-Si-Ti
• thermal and thermodynamic properties
• thermal expansion
• mechanical properties
• compressibility
• transitional
• alkaline
• chalcogen
• disordered
• cubic
• trigonal
• tetragonal
• monoclinic
• triclinic