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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on EuBrO by Materials Project

EuOBr is Matlockite structured and crystallizes in the tetragonal P4/nmm space group. The structure is two-dimensional and consists of one EuOBr sheet oriented in the (0, 0, 1) direction. Eu3+ is bonded in a 4-coordinate geometry to four equivalent O2- and four equivalent Br1- atoms. All Eu–O bond lengths are 2.32 Å. All Eu–Br bond lengths are 3.23 Å. O2- is bonded to four equivalent Eu3+ atoms to form a mixture of corner and edge-sharing OEu4 tetrahedra. Br1- is bonded in a 4-coordinate geometry to four equivalent Eu3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Eu3BrO4 by Materials Project

Eu3O4Br crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. there are two inequivalent Eu3+ sites. In the first Eu3+ site, Eu3+ is bonded in a 7-coordinate geometry to five O2- and two equivalent Br1- atoms. There are a spread of Eu–O bond distances ranging from 2.26–2.36 Å. Both Eu–Br bond lengths are 3.25 Å. In the second Eu3+ site, Eu3+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Eu–O bond distances ranging from 2.28–2.38 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded to four Eu3+ atoms to form a mixture of corner and edge-sharing OEu4 tetrahedra. In the second O2- site, O2- is bonded in a trigonal planar geometry to three Eu3+ atoms. In the third O2- site, O2- is bonded to four Eu3+ atoms to form a mixture of distorted corner and edge-sharing OEu4 tetrahedra. Br1- is bonded in a 4-coordinate geometry to four equivalent Eu3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Eu4Br6O by Materials Project

Eu4OBr6 crystallizes in the hexagonal P6_3mc space group. The structure is three-dimensional. there are two inequivalent Eu2+ sites. In the first Eu2+ site, Eu2+ is bonded in a 1-coordinate geometry to one O2- and seven Br1- atoms. The Eu–O bond length is 2.39 Å. There are a spread of Eu–Br bond distances ranging from 3.09–3.40 Å. In the second Eu2+ site, Eu2+ is bonded in a distorted single-bond geometry to one O2- and six Br1- atoms. The Eu–O bond length is 2.36 Å. There are three shorter (3.16 Å) and three longer (3.34 Å) Eu–Br bond lengths. O2- is bonded in a tetrahedral geometry to four Eu2+ atoms. There are two inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a 5-coordinate geometry to five Eu2+ atoms. In the second Br1- site, Br1- is bonded in a 4-coordinate geometry to four Eu2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Eu2BrO2 by Materials Project

Eu2O2Br crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. there are two inequivalent Eu+2.50+ sites. In the first Eu+2.50+ site, Eu+2.50+ is bonded in a 5-coordinate geometry to five O2- and two equivalent Br1- atoms. There are a spread of Eu–O bond distances ranging from 2.32–2.45 Å. Both Eu–Br bond lengths are 3.37 Å. In the second Eu+2.50+ site, Eu+2.50+ is bonded in a 3-coordinate geometry to three O2- and three equivalent Br1- atoms. There are one shorter (2.26 Å) and two longer (2.32 Å) Eu–O bond lengths. There are two shorter (3.31 Å) and one longer (3.41 Å) Eu–Br bond lengths. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to four Eu+2.50+ atoms to form a mixture of distorted edge and corner-sharing OEu4 tetrahedra. In the second O2- site, O2- is bonded to four Eu+2.50+ atoms to form a mixture of edge and corner-sharing OEu4 trigonal pyramids. Br1- is bonded in a 5-coordinate geometry to five Eu+2.50+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on EuBrO2 by Materials Project

EuO2Br crystallizes in the monoclinic P2_1/m space group. The structure is three-dimensional. Eu is bonded in a 6-coordinate geometry to six O and three equivalent Br atoms. There are a spread of Eu–O bond distances ranging from 2.31–2.39 Å. There are one shorter (3.30 Å) and two longer (3.32 Å) Eu–Br bond lengths. There are two inequivalent O sites. In the first O site, O is bonded in a trigonal non-coplanar geometry to three equivalent Eu atoms. In the second O site, O is bonded in a trigonal non-coplanar geometry to three equivalent Eu atoms. Br is bonded in a distorted trigonal non-coplanar geometry to three equivalent Eu atoms.

36 MATERIALS SCIENCE↗