Materials Data on Ca6GaN5 by Materials Project
Ca6GaN5 crystallizes in the hexagonal P6_3/mcm space group. The structure is three-dimensional. Ca2+ is bonded to five N3- atoms to form a mixture of distorted corner, edge, and face-sharing CaN5 square pyramids. There are a spread of Ca–N bond distances ranging from 2.42–2.80 Å. Ga3+ is bonded in a trigonal planar geometry to three equivalent N3- atoms. All Ga–N bond lengths are 1.88 Å. There are two inequivalent N3- sites. In the first N3- site, N3- is bonded to six equivalent Ca2+ atoms to form distorted edge-sharing NCa6 octahedra. In the second N3- site, N3- is bonded in a 7-coordinate geometry to six equivalent Ca2+ and one Ga3+ atom.
36 MATERIALS SCIENCE↗