Alkaline, Chalcogen, Metalloid, Orthoborate, Keszler

• B-O-Sc-Sr
• B-Ba-O-Sc
• B-Ba-O-Y
• B-Ba-Er-O
• B-Ba-Ho-O
• structural properties
• phase transitions
• temperature for congruent melting
• fusion
• structural transitions
• orthoborate
• metalloid
• alkaline
• chalcogen
• trigonal
• hexagonal
• orthorhombic
• monoclinic
• tetragonal