Fe-Mg-O, Mg-x polyhedra, Structural properties, Triclinic

• Al-Fe-H-Mg-O-Si
• Ca-Fe-Mg-Mn-O-Si
• Al-Ca-Fe-H-Mg-Mn-O-Si
• Fe-Mg-O-V
• Al-Ca-Fe-Mg-O-Si
• transitional
• chalcogen
• alkaline
• disordered