Be-x polyhedra, Chalcogen, Mechanical properties, Orthorhombic

• Al-Be-O
• B-Be-H-O
• Ba-Be-O-Si
• Be-H-O-Si
• Be-Ca-H-Mn-O-Si
• elastic moduli
• isothermal bulk modulus
• hardness
• Mohs hardness
• compressibility
• chalcogen
• alkaline
• non-disordered
• quaternary