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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Eu(BO2)3 by Materials Project

Eu(BO2)3 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. Eu3+ is bonded in a 2-coordinate geometry to ten O2- atoms. There are a spread of Eu–O bond distances ranging from 2.38–2.89 Å. There are two inequivalent B3+ sites. In the first B3+ site, B3+ is bonded in a tetrahedral geometry to four O2- atoms. There is two shorter (1.46 Å) and two longer (1.49 Å) B–O bond length. 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 1.34–1.41 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two equivalent Eu3+ and two B3+ atoms. In the second O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Eu3+ and one B3+ atom. In the third O2- site, O2- is bonded in a 2-coordinate geometry to one Eu3+ and two B3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Eu3(BO3)2 by Materials Project

Eu3B2O6 crystallizes in the trigonal R-3c space group. The structure is three-dimensional. Eu2+ is bonded in a 8-coordinate geometry to eight equivalent O2- atoms. There are a spread of Eu–O bond distances ranging from 2.48–2.96 Å. B3+ is bonded in a trigonal planar geometry to three equivalent O2- atoms. All B–O bond lengths are 1.40 Å. O2- is bonded in a distorted single-bond geometry to four equivalent Eu2+ and one B3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on EuB4O7 by Materials Project

EuB4O7 crystallizes in the orthorhombic Pmn2_1 space group. The structure is three-dimensional. Eu2+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Eu–O bond distances ranging from 2.56–2.89 Å. There are two inequivalent B3+ sites. In the first B3+ site, B3+ is bonded to four O2- atoms to form corner-sharing BO4 tetrahedra. There are a spread of B–O bond distances ranging from 1.43–1.57 Å. In the second B3+ site, B3+ is bonded to four O2- atoms to form corner-sharing BO4 tetrahedra. There is three shorter (1.46 Å) and one longer (1.57 Å) B–O bond length. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two equivalent Eu2+ and two B3+ atoms. In the second O2- site, O2- is bonded in a bent 120 degrees geometry to two equivalent Eu2+ and two B3+ atoms. In the third O2- site, O2- is bonded in a trigonal planar geometry to three B3+ atoms. In the fourth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Eu2+ and two equivalent B3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Eu2B2O5 by Materials Project

Eu2B2O5 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are two inequivalent Eu2+ sites. In the first Eu2+ site, Eu2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Eu–O bond distances ranging from 2.42–2.76 Å. In the second Eu2+ site, Eu2+ is bonded to six O2- atoms to form a mixture of distorted edge and corner-sharing EuO6 octahedra. The corner-sharing octahedral tilt angles are 67°. There are a spread of Eu–O bond distances ranging from 2.48–2.57 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 is two shorter (1.37 Å) and one longer (1.44 Å) B–O bond length. In the second B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There is two shorter (1.37 Å) and one longer (1.42 Å) B–O bond length. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to three Eu2+ and one B3+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to three Eu2+ and one B3+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to three Eu2+ and one B3+ atom. In the fourth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Eu2+ and two B3+ atoms. In the fifth O2- site, O2- is bonded in a distorted single-bond geometry to three Eu2+ and one B3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on EuBO3 by Materials Project

EuBO3 crystallizes in the orthorhombic Ama2 space group. The structure is three-dimensional. Eu3+ is bonded in a body-centered cubic geometry to eight O2- atoms. There are a spread of Eu–O bond distances ranging from 2.29–2.62 Å. B3+ is bonded in a trigonal planar geometry to three O2- atoms. There is one shorter (1.38 Å) and two longer (1.39 Å) B–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to three equivalent Eu3+ and one B3+ atom. In the second O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Eu3+ and one B3+ atom.

36 MATERIALS SCIENCE↗