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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on BaZn2(AsO4)2 by Materials Project

BaZn2(AsO4)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Ba2+ is bonded to seven O2- atoms to form distorted BaO7 hexagonal pyramids that share corners with five ZnO4 tetrahedra, corners with five AsO4 tetrahedra, an edgeedge with one ZnO4 tetrahedra, and an edgeedge with one AsO4 tetrahedra. There are a spread of Ba–O bond distances ranging from 2.75–2.90 Å. There are two inequivalent Zn2+ sites. In the first Zn2+ site, Zn2+ is bonded to four O2- atoms to form ZnO4 tetrahedra that share corners with three equivalent BaO7 hexagonal pyramids and corners with four AsO4 tetrahedra. There are a spread of Zn–O bond distances ranging from 1.94–2.00 Å. In the second Zn2+ site, Zn2+ is bonded to four O2- atoms to form ZnO4 tetrahedra that share corners with two equivalent BaO7 hexagonal pyramids, corners with four AsO4 tetrahedra, and an edgeedge with one BaO7 hexagonal pyramid. There are a spread of Zn–O bond distances ranging from 1.95–2.02 Å. There are two inequivalent As5+ sites. In the first As5+ site, As5+ is bonded to four O2- atoms to form AsO4 tetrahedra that share corners with two equivalent BaO7 hexagonal pyramids, corners with four ZnO4 tetrahedra, and an edgeedge with one BaO7 hexagonal pyramid. There are a spread of As–O bond distances ranging from 1.71–1.73 Å. In the second As5+ site, As5+ is bonded to four O2- atoms to form AsO4 tetrahedra that share corners with three equivalent BaO7 hexagonal pyramids and corners with four ZnO4 tetrahedra. There is one shorter (1.71 Å) and three longer (1.73 Å) As–O bond length. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to one Ba2+, one Zn2+, and one As5+ atom. In the second O2- site, O2- is bonded in a 3-coordinate geometry to one Ba2+, one Zn2+, and one As5+ atom. In the third O2- site, O2- is bonded in a 2-coordinate geometry to one Ba2+, one Zn2+, and one As5+ atom. In the fourth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Ba2+, one Zn2+, and one As5+ atom. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to one Ba2+, one Zn2+, and one As5+ atom. In the sixth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Ba2+, one Zn2+, and one As5+ atom. In the seventh O2- site, O2- is bonded in a bent 120 degrees geometry to one Zn2+ and one As5+ atom. In the eighth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Ba2+, one Zn2+, and one As5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on BaZn2 by Materials Project

BaZn2 crystallizes in the orthorhombic Imma space group. The structure is three-dimensional. Ba is bonded in a 12-coordinate geometry to twelve equivalent Zn atoms. There are a spread of Ba–Zn bond distances ranging from 3.36–3.76 Å. Zn is bonded in a 10-coordinate geometry to six equivalent Ba and four equivalent Zn atoms. There are a spread of Zn–Zn bond distances ranging from 2.81–2.89 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on BaZn2(BO3)2 by Materials Project

BaZn2(BO3)2 crystallizes in the orthorhombic P2_12_12_1 space group. The structure is three-dimensional. Ba2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Ba–O bond distances ranging from 2.76–3.14 Å. There are two inequivalent Zn2+ sites. In the first Zn2+ site, Zn2+ is bonded to four O2- atoms to form corner-sharing ZnO4 tetrahedra. There are a spread of Zn–O bond distances ranging from 1.96–2.01 Å. In the second Zn2+ site, Zn2+ is bonded to four O2- atoms to form corner-sharing ZnO4 tetrahedra. There are a spread of Zn–O bond distances ranging from 1.96–2.00 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 1.37–1.43 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 1.37–1.41 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to one Ba2+, two Zn2+, and one B3+ atom. In the second O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one Ba2+, two equivalent Zn2+, and one B3+ atom. In the third O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Ba2+, one Zn2+, and one B3+ atom. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to one Ba2+, one Zn2+, and one B3+ atom. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to one Ba2+, one Zn2+, and one B3+ atom. In the sixth O2- site, O2- is bonded in a 2-coordinate geometry to one Ba2+, one Zn2+, and one B3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on BaZn2(PO4)2 by Materials Project

BaZn2(PO4)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Ba2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Ba–O bond distances ranging from 2.74–2.87 Å. There are two inequivalent Zn2+ sites. In the first Zn2+ site, Zn2+ is bonded to four O2- atoms to form ZnO4 tetrahedra that share corners with four PO4 tetrahedra. There are a spread of Zn–O bond distances ranging from 1.93–2.00 Å. In the second Zn2+ site, Zn2+ is bonded to four O2- atoms to form ZnO4 tetrahedra that share corners with four PO4 tetrahedra. There are a spread of Zn–O bond distances ranging from 1.94–2.01 Å. There are two inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four ZnO4 tetrahedra. There is two shorter (1.55 Å) and two longer (1.56 Å) P–O bond length. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four ZnO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.54–1.57 Å. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to one Ba2+, one Zn2+, and one P5+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to one Ba2+, one Zn2+, and one P5+ atom. In the third O2- site, O2- is bonded in a 2-coordinate geometry to one Ba2+, one Zn2+, and one P5+ atom. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to one Ba2+, one Zn2+, and one P5+ atom. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to one Ba2+, one Zn2+, and one P5+ atom. In the sixth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Ba2+, one Zn2+, and one P5+ atom. In the seventh O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Zn2+ and one P5+ atom. In the eighth O2- site, O2- is bonded in a 3-coordinate geometry to one Ba2+, one Zn2+, and one P5+ atom.

36 MATERIALS SCIENCE↗