Materials Data on SiC2 by Materials Project

SiC2 crystallizes in the tetragonal P4_2/mmc space group. The structure is three-dimensional. Si4+ is bonded to four equivalent C2- atoms to form corner-sharing SiC4 tetrahedra. All Si–C bond lengths are 1.90 Å. C2- is bonded in a trigonal planar geometry to two equivalent Si4+ and one C2- atom. The C–C bond length is 1.37 Å.

二碳化硅（SiC₂）结晶于四方晶系P4₂/mmc空间群。该结构为三维结构。四价硅离子（Si⁴+）与四个等价的二价碳负离子（C²⁻）配位形成共顶的SiC₄四面体。所有Si–C键长均为1.90埃（Å）。二价碳负离子以平面三角配位构型与两个等价的四价硅离子以及一个二价碳负离子成键，C–C键长为1.37埃（Å）。