Fe-Mg-O, Mechanical properties, Mg-x polyhedra, Trigonal

• C-Ca-Fe-Mg-Mn-O
• Al-Fe-H-Mg-O-Si
• Al-Ca-Fe-H-Mg-O-S
• B-Cl-Fe-Mg-O
• elastic moduli
• isothermal bulk modulus
• compressibility
• hardness
• transitional
• chalcogen
• alkaline
• disordered