Materials Data on CdCu2(BO3)2 by Materials Project
Cu2CdB2O6 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are two inequivalent Cu2+ sites. In the first Cu2+ site, Cu2+ is bonded in a rectangular see-saw-like geometry to four O2- atoms. There are a spread of Cu–O bond distances ranging from 1.90–1.98 Å. In the second Cu2+ site, Cu2+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Cu–O bond distances ranging from 1.86–2.65 Å. Cd2+ is bonded to six O2- atoms to form edge-sharing CdO6 octahedra. There are a spread of Cd–O bond distances ranging from 2.26–2.56 Å. There are two inequivalent B3+ sites. In the first B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of B–O bond distances ranging from 1.36–1.42 Å. In the second B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of B–O bond distances ranging from 1.34–1.43 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Cu2+ and one B3+ atom. In the second O2- site, O2- is bonded in a 1-coordinate geometry to one Cu2+, two equivalent Cd2+, and one B3+ atom. In the third O2- site, O2- is bonded to two Cu2+ and two equivalent Cd2+ atoms to form distorted corner-sharing OCd2Cu2 tetrahedra. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to one Cu2+, one Cd2+, and one B3+ atom. In the fifth O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent Cu2+, one Cd2+, and one B3+ atom. In the sixth O2- site, O2- is bonded in a 2-coordinate geometry to one Cu2+ and two B3+ atoms.