Materials Data on Nb2Mo2C3 by Materials Project
Nb2Mo2C3 is MAX Phase-like structured and crystallizes in the trigonal R-3m space group. The structure is two-dimensional and consists of three Nb2Mo2C3 sheets oriented in the (0, 0, 1) direction. Nb+3.50+ is bonded in a distorted T-shaped geometry to three equivalent C4- atoms. All Nb–C bond lengths are 2.14 Å. Mo+2.50+ is bonded to six C4- atoms to form a mixture of edge and corner-sharing MoC6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are three shorter (2.19 Å) and three longer (2.24 Å) Mo–C bond lengths. There are two inequivalent C4- sites. In the first C4- site, C4- is bonded to three equivalent Nb+3.50+ and three equivalent Mo+2.50+ atoms to form CNb3Mo3 octahedra that share corners with three equivalent CMo6 octahedra and edges with nine CNb3Mo3 octahedra. The corner-sharing octahedral tilt angles are 2°. In the second C4- site, C4- is bonded to six equivalent Mo+2.50+ atoms to form a mixture of edge and corner-sharing CMo6 octahedra. The corner-sharing octahedral tilt angles are 2°.