Materials Data on C by Materials Project

Abstract

C crystallizes in the trigonal R-3m space group. The structure is two-dimensional and consists of three C sheets oriented in the (0, 0, 1) direction. there are six inequivalent C sites. In the first C site, C is bonded in a trigonal planar geometry to three C atoms. There are a spread of C–C bond distances ranging from 1.41–1.45 Å. In the second C site, C is bonded in a trigonal planar geometry to three C atoms. There is one shorter (1.36 Å) and two longer (1.52 Å) C–C bond length. In the third C site, C is bonded to four C atoms to form a mixture of corner and edge-sharing CC4 tetrahedra. There is one shorter (1.51 Å) and two longer (1.60 Å) C–C bond length. In the fourth C site, C is bonded in a trigonal planar geometry to three C atoms. There is one shorter (1.39 Å) and one longer (1.48 Å) C–C bond length. In the fifth C site, C is bonded in a trigonal planar geometry to three C atoms. The C–C bond length is 1.42 Å. In the sixth C site, C is bonded in a trigonal planar geometry to three C atoms.