Be-Fe, Chalcogen

• Be-Fe-O-S-Si
• Be-Ca-Eu-Fe-O-Si-Y
• Be-Ca-Ce-Fe-O-Si-Y
• Be-Ca-Dy-Fe-O-Si-Y
• Be-Ca-Er-Fe-O-Si-Y
• structural properties
• thermal and thermodynamic properties
• electronic and electrical properties
• phase transitions
• thermal expansion
• transitional
• chalcogen
• alkaline
• metalloid
• monoclinic
• hexagonal
• cubic
• trigonal
• orthorhombic