Keenan

• Ca-Ga-La-O
• Ge-H-La-Na-O-Si
• Ca-Mn-O-Sr
• I-Y
• I-Tm
• structural properties
• halogen
• actinoid
• radioactive
• non-disordered
• trigonal
• orthorhombic
• hexagonal
• tetragonal
• monoclinic