Materials Data on Mg2SiO4 by Materials Project

Mg2SiO4 is Spinel structured and crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Mg2+ is bonded to six equivalent O2- atoms to form MgO6 octahedra that share corners with six equivalent SiO4 tetrahedra and edges with six equivalent MgO6 octahedra. All Mg–O bond lengths are 2.09 Å. Si4+ is bonded to four equivalent O2- atoms to form SiO4 tetrahedra that share corners with twelve equivalent MgO6 octahedra. The corner-sharing octahedral tilt angles are 53°. All Si–O bond lengths are 1.68 Å. O2- is bonded in a rectangular see-saw-like geometry to three equivalent Mg2+ and one Si4+ atom.

二硅酸四镁（Mg₂SiO₄）具有尖晶石（Spinel）结构，结晶于立方晶系Fd-3m空间群。该晶体结构为三维网状结构。镁离子（Mg²⁺）与六个等价的氧离子（O²⁻）成键，形成MgO₆八面体（octahedra）；该八面体与六个等价的SiO₄四面体（tetrahedra）共享顶角，同时与六个等价的MgO₆八面体（octahedra）共享棱边。所有Mg—O键的键长均为2.09 Å（埃）。硅离子（Si⁴⁺）与四个等价的氧离子（O²⁻）成键，形成SiO₄四面体（tetrahedra）；该四面体与十二个等价的MgO₆八面体（octahedra）共享顶角。共顶角八面体的倾斜角为53°。所有Si—O键的键长均为1.68 Å。氧离子（O²⁻）以矩形跷跷板式配位几何构型与三个等价的Mg²⁺以及一个Si⁴⁺原子成键。