Keenan

• Ca-Ga-La-O
• Ge-H-La-Na-O-Si
• Ba-Fe-H-O
• Ca-Mn-O-Sr
• F-Np-Rb
• structural properties
• halogen
• non-disordered
• radioactive
• actinoid
• trigonal
• orthorhombic
• hexagonal
• tetragonal
• monoclinic