Cell and atoms, Chalcogen, Elastic moduli, Mg-x polyhedra

• H-Mg-O-Si
• Al-H-Mg-O-Si
• H-Mg-O-P
• H-Mg-O-S
• Al-Fe-H-Mg-O-Si
• isothermal bulk modulus
• shear modulus
• Young modulus
• Poisson ratio
• chalcogen
• alkaline
• disordered
• transitional
• monoclinic
• orthorhombic
• cubic
• trigonal
• triclinic