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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on TbCu(BO2)5 by Materials Project

TbCu(BO2)5 crystallizes in the orthorhombic Ibam space group. The structure is three-dimensional. Tb3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are four shorter (2.27 Å) and four longer (2.53 Å) Tb–O bond lengths. Cu2+ is bonded in an octahedral geometry to six O2- atoms. There are four shorter (1.99 Å) and two longer (2.48 Å) Cu–O bond lengths. There are two inequivalent B3+ sites. In the first B3+ site, B3+ is bonded in a tetrahedral geometry to four equivalent O2- atoms. All B–O bond lengths are 1.48 Å. In the second B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There is one shorter (1.35 Å) and two longer (1.40 Å) B–O bond length. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to one Tb3+, one Cu2+, and one B3+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to one Tb3+ and two B3+ atoms. In the third O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Cu2+ and two equivalent B3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Tb2Cu(BO2)8 by Materials Project

Tb2Cu(BO2)8 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Tb3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Tb–O bond distances ranging from 2.30–2.51 Å. Cu2+ is bonded in an octahedral geometry to six O2- atoms. There are a spread of Cu–O bond distances ranging from 1.97–2.44 Å. There are four inequivalent B3+ sites. In the first B3+ site, B3+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of B–O bond distances ranging from 1.47–1.49 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 1.35–1.40 Å. In the third 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 1.35–1.41 Å. In the fourth 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 1.35–1.40 Å. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Tb3+ and two B3+ atoms. In the second O2- site, O2- is bonded in a 3-coordinate geometry to one Tb3+, one Cu2+, and one B3+ atom. In the third O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Tb3+ and two B3+ atoms. In the fourth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Cu2+ and two B3+ atoms. In the fifth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Tb3+ and two B3+ atoms. In the sixth O2- site, O2- is bonded in a 2-coordinate geometry to one Tb3+ and two B3+ atoms. In the seventh O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent Tb3+ and one B3+ atom. In the eighth O2- site, O2- is bonded in a 3-coordinate geometry to one Tb3+, one Cu2+, and one B3+ atom.

36 MATERIALS SCIENCE↗