Alkaline, Transitional, Be-Fe, Structural properties

• Be-Fe-O-S-Si
• Be-Fe-O-Si-Y
• Be-Fe-Nd-O-Si
• Be-Ce-Fe-O-Si
• alkaline
• transitional
• chalcogen
• metalloid
• hexagonal
• cubic
• monoclinic
• trigonal
• orthorhombic