Be-O, Be-x polyhedra, Debye or einstein temperature

• B-Be-H-O
• Be-H-Na-O-Si
• Be-Ca-H-O-P
• Be-H-O-P
• alkaline
• chalcogen
• non-disordered
• metalloid
• orthorhombic
• monoclinic
• hexagonal
• cubic
• trigonal