Materials Data on URuC2 by Materials Project
URuC2 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. U6+ is bonded to seven C4- atoms to form distorted UC7 pentagonal bipyramids that share corners with four equivalent UC7 pentagonal bipyramids, corners with three equivalent RuC5 trigonal bipyramids, edges with four equivalent UC7 pentagonal bipyramids, edges with seven equivalent RuC5 trigonal bipyramids, and faces with two equivalent UC7 pentagonal bipyramids. There are a spread of U–C bond distances ranging from 2.38–2.53 Å. Ru2+ is bonded to five C4- atoms to form RuC5 trigonal bipyramids that share corners with three equivalent UC7 pentagonal bipyramids, corners with four equivalent RuC5 trigonal bipyramids, edges with seven equivalent UC7 pentagonal bipyramids, and edges with two equivalent RuC5 trigonal bipyramids. There are a spread of Ru–C bond distances ranging from 2.07–2.16 Å. There are two inequivalent C4- sites. In the first C4- site, C4- is bonded to four equivalent U6+ and two equivalent Ru2+ atoms to form a mixture of face, edge, and corner-sharing CU4Ru2 octahedra. The corner-sharing octahedra tilt angles range from 14–58°. In the second C4- site, C4- is bonded to three equivalent U6+ and three equivalent Ru2+ atoms to form a mixture of face, edge, and corner-sharing CU3Ru3 octahedra. The corner-sharing octahedra tilt angles range from 14–58°.