Elastic stiffness coefficient, Mg-x polyhedra, Quaternary

• Ca-Mg-O-Si
• Mg-Nb-O-Pb
• Fe-Mg-O-Si
• H-Mg-O-S
• Br-H-Mg-O
• quaternary
• alkaline
• chalcogen
• disordered
• metalloid
• monoclinic
• cubic
• orthorhombic