DOE OSTI2020
TbCu(WO4)2 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are three inequivalent Tb3+ sites. In the first Tb3+ site, Tb3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Tb–O bond distances ranging from 2.29–2.84 Å. In the second Tb3+ site, Tb3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Tb–O bond distances ranging from 2.28–2.61 Å. In the third Tb3+ site, Tb3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Tb–O bond distances ranging from 2.28–2.72 Å. There are six inequivalent W6+ sites. In the first W6+ site, W6+ is bonded to six O2- atoms to form distorted edge-sharing WO6 octahedra. There are a spread of W–O bond distances ranging from 1.80–2.20 Å. In the second W6+ site, W6+ is bonded to six O2- atoms to form distorted edge-sharing WO6 octahedra. There are a spread of W–O bond distances ranging from 1.80–2.21 Å. In the third W6+ site, W6+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of W–O bond distances ranging from 1.80–2.30 Å. In the fourth W6+ site, W6+ is bonded to six O2- atoms to form distorted edge-sharing WO6 octahedra. There are a spread of W–O bond distances ranging from 1.81–2.21 Å. In the fifth W6+ site, W6+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of W–O bond distances ranging from 1.81–2.28 Å. In the sixth W6+ site, W6+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of W–O bond distances ranging from 1.80–2.26 Å. There are four inequivalent Cu1+ sites. In the first Cu1+ site, Cu1+ is bonded in a linear geometry to two equivalent O2- atoms. Both Cu–O bond lengths are 1.85 Å. In the second Cu1+ site, Cu1+ is bonded in a distorted square co-planar geometry to four O2- atoms. There are two shorter (1.87 Å) and two longer (2.46 Å) Cu–O bond lengths. In the third Cu1+ site, Cu1+ is bonded in a 4-coordinate geometry to three O2- atoms. There are a spread of Cu–O bond distances ranging from 1.85–2.58 Å. In the fourth Cu1+ site, Cu1+ is bonded in a distorted linear geometry to four O2- atoms. There are a spread of Cu–O bond distances ranging from 1.86–2.75 Å. There are twenty-four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to one Tb3+ and two equivalent W6+ atoms. In the second O2- site, O2- is bonded in a 3-coordinate geometry to one Tb3+ and two W6+ atoms. In the third O2- site, O2- is bonded in a 3-coordinate geometry to one Tb3+ and two equivalent W6+ atoms. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to one Tb3+ and two W6+ atoms. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to one Tb3+ and two W6+ atoms. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to two W6+ and one Cu1+ atom. In the seventh O2- site, O2- is bonded in a 3-coordinate geometry to one Tb3+, one W6+, and one Cu1+ atom. In the eighth O2- site, O2- is bonded in a 2-coordinate geometry to one Tb3+ and one W6+ atom. In the ninth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two equivalent Tb3+ and one W6+ atom. In the tenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Tb3+ and one W6+ atom. In the eleventh O2- site, O2- is bonded in a 2-coordinate geometry to one Tb3+, one W6+, and one Cu1+ atom. In the twelfth O2- site, O2- is bonded in a 4-coordinate geometry to one Tb3+, two W6+, and one Cu1+ atom. In the thirteenth O2- site, O2- is bonded in a 3-coordinate geometry to two W6+ and one Cu1+ atom. In the fourteenth O2- site, O2- is bonded in a 3-coordinate geometry to two W6+ and one Cu1+ atom. In the fifteenth O2- site, O2- is bonded in a bent 150 degrees geometry to one Tb3+ and one W6+ atom. In the sixteenth O2- site, O2- is bonded in a 3-coordinate geometry to one Tb3+, one W6+, and one Cu1+ atom. In the seventeenth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Tb3+ and two W6+ atoms. In the eighteenth O2- site, O2- is bonded in a 2-coordinate geometry to two Tb3+ and one W6+ atom. In the nineteenth O2- site, O2- is bonded in a 2-coordinate geometry to one Tb3+, two W6+, and one Cu1+ atom. In the twentieth O2- site, O2- is bonded in a 1-coordinate geometry to one Tb3+, one W6+, and one Cu1+ atom. In the twenty-first O2- site, O2- is bonded in a 4-coordinate geometry to one Tb3+, two W6+, and one Cu1+ atom. In the twenty-second O2- site, O2- is bonded in a bent 120 degrees geometry to one Tb3+ and one W6+ atom. In the twenty-third O2- site, O2- is bonded in a bent 150 degrees geometry to one Tb3+ and one W6+ atom. In the twenty-fourth O2- site, O2- is bonded in a bent 150 degrees geometry to one Tb3+ and one W6+ atom.