Trautmann

• Al-C-Fe-Mg-Na-O-Si
• Al-Fe-Mg-O-Si
• Gd-O-Ti
• O-Ti-Yb
• O-Sm-Ti
• structural properties
• chalcogen
• transitional
• rare earth
• ternary
• lanthanoid
• orthorhombic
• cubic
• hexagonal