Keszler, Structural properties, Transitional

• B-O-Sc-Sr
• Nb-Pd-Se
• Cl-H-O-Zr
• B-Cu-O-Sr
• Cl-H-Hf-O
• transitional
• chalcogen
• metalloid
• alkaline
• trigonal
• monoclinic
• orthorhombic
• tetragonal
• cubic