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Materials Data on Ba(PO4)2 by Materials Project

Ba(PO4)2 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are three inequivalent Ba sites. In the first Ba site, Ba is bonded in a 6-coordinate geometry to nine O atoms. There are a spread of Ba–O bond distances ranging from 2.63–3.36 Å. In the second Ba site, Ba is bonded in a 9-coordinate geometry to nine O atoms. There are a spread of Ba–O bond distances ranging from 2.70–3.16 Å. In the third Ba site, Ba is bonded in a 9-coordinate geometry to nine O atoms. There are a spread of Ba–O bond distances ranging from 2.66–3.18 Å. There are six inequivalent P sites. In the first P site, P is bonded to four O atoms to form corner-sharing PO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.50–1.62 Å. In the second P site, P is bonded to four O atoms to form corner-sharing PO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.49–1.62 Å. In the third P site, P is bonded to four O atoms to form corner-sharing PO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.49–1.65 Å. In the fourth P site, P is bonded to four O atoms to form corner-sharing PO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.50–1.63 Å. In the fifth P site, P is bonded to four O atoms to form corner-sharing PO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.49–1.63 Å. In the sixth P site, P is bonded to four O atoms to form corner-sharing PO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.49–1.63 Å. There are twenty-four inequivalent O sites. In the first O site, O is bonded in a bent 120 degrees geometry to two P atoms. In the second O site, O is bonded in a bent 120 degrees geometry to two P atoms. In the third O site, O is bonded in a bent 120 degrees geometry to two P atoms. In the fourth O site, O is bonded in a bent 120 degrees geometry to two P atoms. In the fifth O site, O is bonded in a bent 120 degrees geometry to two P atoms. In the sixth O site, O is bonded in a bent 120 degrees geometry to two P atoms. In the seventh O site, O is bonded in a distorted single-bond geometry to two equivalent Ba and one P atom. In the eighth O site, O is bonded in a distorted single-bond geometry to two Ba and one P atom. In the ninth O site, O is bonded in a distorted single-bond geometry to two Ba and one P atom. In the tenth O site, O is bonded in a distorted single-bond geometry to two Ba and one P atom. In the eleventh O site, O is bonded in a distorted single-bond geometry to two Ba and one P atom. In the twelfth O site, O is bonded in a distorted single-bond geometry to two Ba and one P atom. In the thirteenth O site, O is bonded in a distorted single-bond geometry to two equivalent Ba and one P atom. In the fourteenth O site, O is bonded in a distorted single-bond geometry to one Ba and one P atom. In the fifteenth O site, O is bonded in a distorted single-bond geometry to two Ba and one P atom. In the sixteenth O site, O is bonded in a distorted single-bond geometry to one Ba and one P atom. In the seventeenth O site, O is bonded in a distorted bent 150 degrees geometry to one Ba and one P atom. In the eighteenth O site, O is bonded in a distorted single-bond geometry to two Ba and one P atom. In the nineteenth O site, O is bonded in a water-like geometry to two Ba atoms. In the twentieth O site, O is bonded in a single-bond geometry to one Ba atom. In the twenty-first O site, O is bonded in a distorted single-bond geometry to two equivalent Ba and one O atom. The O–O bond length is 1.24 Å. In the twenty-second O site, O is bonded in a 2-coordinate geometry to one Ba and one O atom. The O–O bond length is 1.28 Å. In the twenty-third O site, O is bonded in a bent 120 degrees geometry to two O atoms. The O–O bond length is 1.29 Å. In the twenty-fourth O site, O is bonded in a single-bond geometry to one O atom.

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Materials Data on Ba(PO4)2 by Materials Project

Ba(PO4)2 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. Ba is bonded in a 9-coordinate geometry to nine O atoms. There are a spread of Ba–O bond distances ranging from 2.72–3.04 Å. There are two inequivalent P sites. In the first P site, P is bonded in a tetrahedral geometry to four O atoms. There are a spread of P–O bond distances ranging from 1.53–1.56 Å. In the second P site, P is bonded in a tetrahedral geometry to four O atoms. There are a spread of P–O bond distances ranging from 1.53–1.56 Å. There are eight inequivalent O sites. In the first O site, O is bonded in a single-bond geometry to one Ba and one P atom. In the second O site, O is bonded in a distorted single-bond geometry to two equivalent Ba and one P atom. In the third O site, O is bonded in a distorted single-bond geometry to two equivalent Ba and one P atom. In the fourth O site, O is bonded in a distorted single-bond geometry to one Ba and one P atom. In the fifth O site, O is bonded in a single-bond geometry to one Ba and one P atom. In the sixth O site, O is bonded in a distorted single-bond geometry to one Ba and one P atom. In the seventh O site, O is bonded in a single-bond geometry to one P atom. In the eighth O site, O is bonded in a distorted single-bond geometry to one Ba and one P atom.

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Materials Data on Ba(PO4)2 by Materials Project

Ba3(P3O11)2O2 crystallizes in the triclinic P-1 space group. The structure is three-dimensional and consists of two hydrogen peroxide molecules and one Ba3(P3O11)2 framework. In the Ba3(P3O11)2 framework, there are three inequivalent Ba sites. In the first Ba site, Ba is bonded in a 8-coordinate geometry to eight O atoms. There are a spread of Ba–O bond distances ranging from 2.60–3.24 Å. In the second Ba site, Ba is bonded in a 9-coordinate geometry to nine O atoms. There are a spread of Ba–O bond distances ranging from 2.70–3.15 Å. In the third Ba site, Ba is bonded in a 9-coordinate geometry to nine O atoms. There are a spread of Ba–O bond distances ranging from 2.66–3.13 Å. There are six inequivalent P sites. In the first P site, P is bonded to four O atoms to form corner-sharing PO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.50–1.62 Å. In the second P site, P is bonded to four O atoms to form corner-sharing PO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.49–1.63 Å. In the third P site, P is bonded to four O atoms to form corner-sharing PO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.49–1.66 Å. In the fourth P site, P is bonded to four O atoms to form corner-sharing PO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.49–1.63 Å. In the fifth P site, P is bonded to four O atoms to form corner-sharing PO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.49–1.62 Å. In the sixth P site, P is bonded to four O atoms to form corner-sharing PO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.49–1.63 Å. There are twenty-two inequivalent O sites. In the first O site, O is bonded in a bent 120 degrees geometry to two P atoms. In the second O site, O is bonded in a bent 120 degrees geometry to two P atoms. In the third O site, O is bonded in a bent 120 degrees geometry to two P atoms. In the fourth O site, O is bonded in a bent 120 degrees geometry to two P atoms. In the fifth O site, O is bonded in a bent 120 degrees geometry to two P atoms. In the sixth O site, O is bonded in a bent 120 degrees geometry to two P atoms. In the seventh O site, O is bonded in a distorted single-bond geometry to two equivalent Ba and one P atom. In the eighth O site, O is bonded in a distorted single-bond geometry to two Ba and one P atom. In the ninth O site, O is bonded in a distorted single-bond geometry to two Ba and one P atom. In the tenth O site, O is bonded in a distorted single-bond geometry to two Ba and one P atom. In the eleventh O site, O is bonded in a distorted single-bond geometry to two Ba and one P atom. In the twelfth O site, O is bonded in a single-bond geometry to two Ba and one P atom. In the thirteenth O site, O is bonded in a distorted single-bond geometry to two equivalent Ba and one P atom. In the fourteenth O site, O is bonded in a distorted single-bond geometry to one Ba and one P atom. In the fifteenth O site, O is bonded in a distorted single-bond geometry to two Ba and one P atom. In the sixteenth O site, O is bonded in a distorted single-bond geometry to one Ba and one P atom. In the seventeenth O site, O is bonded in a distorted bent 150 degrees geometry to one Ba and one P atom. In the eighteenth O site, O is bonded in a distorted single-bond geometry to two Ba and one P atom. In the nineteenth O site, O is bonded in a bent 120 degrees geometry to two Ba atoms. In the twentieth O site, O is bonded in a distorted single-bond geometry to two equivalent Ba and one O atom. The O–O bond length is 1.24 Å. In the twenty-first O site, O is bonded in a bent 150 degrees geometry to one Ba and one O atom. The O–O bond length is 1.23 Å. In the twenty-second O site, O is bonded in a single-bond geometry to one O atom.

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Materials Data on Ba2B(PO4)2 by Materials Project

Ba2B(PO4)2 crystallizes in the tetragonal I-42d space group. The structure is three-dimensional. Ba2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ba–O bond distances ranging from 2.86–3.06 Å. B3+ is bonded to four equivalent O2- atoms to form BO4 tetrahedra that share corners with four equivalent PO4 tetrahedra. All B–O bond lengths are 1.47 Å. P+4.50+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two equivalent BO4 tetrahedra. There is two shorter (1.53 Å) and two longer (1.59 Å) P–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to one Ba2+, one B3+, and one P+4.50+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to three equivalent Ba2+ and one P+4.50+ atom.

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Materials Data on BaBe2(PO4)2 by Materials Project

BaBe2(PO4)2 crystallizes in the trigonal P-3m1 space group. The structure is three-dimensional. Ba2+ is bonded to twelve equivalent O2- atoms to form BaO12 cuboctahedra that share edges with six equivalent BaO12 cuboctahedra, edges with six equivalent BeO4 tetrahedra, and edges with six equivalent PO4 tetrahedra. All Ba–O bond lengths are 3.01 Å. Be2+ is bonded to four O2- atoms to form BeO4 tetrahedra that share corners with four equivalent PO4 tetrahedra and edges with three equivalent BaO12 cuboctahedra. There is one shorter (1.58 Å) and three longer (1.64 Å) Be–O bond length. P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four equivalent BeO4 tetrahedra and edges with three equivalent BaO12 cuboctahedra. There is one shorter (1.50 Å) and three longer (1.56 Å) P–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a linear geometry to one Be2+ and one P5+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Ba2+, one Be2+, and one P5+ atom.

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Materials Data on BaGe(PO4)2 by Materials Project

BaGe(PO4)2 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.83–3.08 Å. Ge4+ is bonded to six O2- atoms to form GeO6 octahedra that share corners with six equivalent PO4 tetrahedra. There is two shorter (1.86 Å) and four longer (1.91 Å) Ge–O bond length. P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with three equivalent GeO6 octahedra. The corner-sharing octahedra tilt angles range from 35–45°. There is two shorter (1.53 Å) and two longer (1.57 Å) P–O bond length. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to one Ge4+ and one P5+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to three equivalent Ba2+ and one P5+ atom. In the third O2- site, O2- is bonded in a 2-coordinate geometry to one Ba2+, one Ge4+, and one P5+ atom.

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Materials Data on BaHf(PO4)2 by Materials Project

BaHf(PO4)2 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.86–3.18 Å. Hf4+ is bonded to six O2- atoms to form HfO6 octahedra that share corners with six equivalent PO4 tetrahedra. There are two shorter (2.02 Å) and four longer (2.09 Å) Hf–O bond lengths. P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with three equivalent HfO6 octahedra. The corner-sharing octahedra tilt angles range from 22–39°. There are a spread of P–O bond distances ranging from 1.52–1.56 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to one Ba2+, one Hf4+, and one P5+ atom. In the second O2- site, O2- is bonded in a bent 150 degrees geometry to one Hf4+ and one P5+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to three equivalent Ba2+ and one P5+ atom.

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Materials Data on BaZr(PO4)2 by Materials Project

BaZr(PO4)2 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.87–3.22 Å. Zr4+ is bonded to six O2- atoms to form ZrO6 octahedra that share corners with six equivalent PO4 tetrahedra. There are two shorter (2.05 Å) and four longer (2.13 Å) Zr–O bond lengths. P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with three equivalent ZrO6 octahedra. The corner-sharing octahedra tilt angles range from 23–40°. There are a spread of P–O bond distances ranging from 1.52–1.57 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to three equivalent Ba2+ and one P5+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to one Ba2+, one Zr4+, and one P5+ atom. In the third O2- site, O2- is bonded in a bent 150 degrees geometry to one Zr4+ and one P5+ atom.

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Materials Data on Ba3(PO4)2 by Materials Project

Ba3(PO4)2 crystallizes in the trigonal R-3m space group. The structure is three-dimensional. there are two inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.67–2.99 Å. In the second Ba2+ site, Ba2+ is bonded to twelve O2- atoms to form distorted BaO12 cuboctahedra that share edges with six equivalent BaO12 cuboctahedra and edges with six equivalent PO4 tetrahedra. There are six shorter (2.78 Å) and six longer (3.28 Å) Ba–O bond lengths. P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share edges with three equivalent BaO12 cuboctahedra. There is one shorter (1.55 Å) and three longer (1.57 Å) P–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to four Ba2+ and one P5+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to four Ba2+ and one P5+ atom.

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Materials Data on BaCo2(PO4)2 by Materials Project

BaCo2(PO4)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.78–3.33 Å. Co2+ is bonded to five O2- atoms to form distorted CoO5 trigonal bipyramids that share corners with three equivalent PO4 tetrahedra, corners with two equivalent CoO5 trigonal bipyramids, and an edgeedge with one PO4 tetrahedra. There are a spread of Co–O bond distances ranging from 1.98–2.32 Å. P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with three equivalent CoO5 trigonal bipyramids and an edgeedge with one CoO5 trigonal bipyramid. There are a spread of P–O bond distances ranging from 1.55–1.58 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Ba2+, one Co2+, and one P5+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Ba2+, one Co2+, and one P5+ atom. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Co2+ and one P5+ atom. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to one Ba2+, one Co2+, and one P5+ atom.

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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.

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Materials Data on BaZr(PO4)2 by Materials Project

BaZr(PO4)2 crystallizes in the trigonal P-3m1 space group. The structure is three-dimensional. Ba2+ is bonded to twelve O2- atoms to form BaO12 cuboctahedra that share edges with six equivalent BaO12 cuboctahedra, edges with six equivalent PO4 tetrahedra, and faces with two equivalent ZrO6 octahedra. There are six shorter (3.02 Å) and six longer (3.12 Å) Ba–O bond lengths. Zr4+ is bonded to six equivalent O2- atoms to form ZrO6 octahedra that share corners with six equivalent PO4 tetrahedra and faces with two equivalent BaO12 cuboctahedra. All Zr–O bond lengths are 2.09 Å. P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with three equivalent ZrO6 octahedra and edges with three equivalent BaO12 cuboctahedra. The corner-sharing octahedral tilt angles are 18°. There is one shorter (1.52 Å) and three longer (1.56 Å) P–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to one Ba2+, one Zr4+, and one P5+ atom. In the second O2- site, O2- is bonded in a single-bond geometry to three equivalent Ba2+ and one P5+ atom.

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Materials Data on Ba2Co(PO4)2 by Materials Project

Ba2Co(PO4)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are two inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ba–O bond distances ranging from 2.69–3.20 Å. In the second Ba2+ site, Ba2+ is bonded to seven O2- atoms to form distorted BaO7 pentagonal bipyramids that share corners with three equivalent CoO6 octahedra, corners with two equivalent BaO7 pentagonal bipyramids, corners with five PO4 tetrahedra, an edgeedge with one CoO6 octahedra, and an edgeedge with one PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 45–79°. There are a spread of Ba–O bond distances ranging from 2.72–2.93 Å. Co2+ is bonded to six O2- atoms to form distorted CoO6 octahedra that share corners with three equivalent BaO7 pentagonal bipyramids, corners with four PO4 tetrahedra, an edgeedge with one BaO7 pentagonal bipyramid, and an edgeedge with one PO4 tetrahedra. There are a spread of Co–O bond distances ranging from 2.07–2.54 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 two equivalent CoO6 octahedra and corners with four equivalent BaO7 pentagonal bipyramids. The corner-sharing octahedra tilt angles range from 38–44°. There is three shorter (1.56 Å) and one longer (1.57 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 two equivalent CoO6 octahedra, a cornercorner with one BaO7 pentagonal bipyramid, an edgeedge with one CoO6 octahedra, and an edgeedge with one BaO7 pentagonal bipyramid. The corner-sharing octahedra tilt angles range from 31–59°. There are a spread of P–O bond distances ranging from 1.53–1.57 Å. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Ba2+ and one P5+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to two Ba2+, one Co2+, and one P5+ atom. In the third O2- site, O2- is bonded in a 2-coordinate geometry to one Ba2+, one Co2+, and one P5+ atom. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to two Ba2+, one Co2+, and one P5+ atom. In the fifth O2- site, O2- is bonded in a 1-coordinate geometry to two Ba2+, one Co2+, and one P5+ atom. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to one Ba2+, one Co2+, and one P5+ atom. In the seventh O2- site, O2- is bonded in a distorted single-bond geometry to three Ba2+ and one P5+ atom. In the eighth O2- site, O2- is bonded in a 1-coordinate geometry to two Ba2+, one Co2+, and one P5+ atom.

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Materials Data on BaMo(PO4)2 by Materials Project

Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

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Materials Data on BaFe2(PO4)2 by Materials Project

Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

36 MATERIALS SCIENCE↗

Materials Data on BaMo(PO4)2 by Materials Project

Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

36 MATERIALS SCIENCE↗

Materials Data on Ba2Cu(PO4)2 by Materials Project

Ba2Cu(PO4)2 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. Ba2+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Ba–O bond distances ranging from 2.66–3.05 Å. Cu2+ is bonded in a square co-planar geometry to four equivalent O2- atoms. All Cu–O bond lengths are 1.97 Å. P5+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of P–O bond distances ranging from 1.53–1.58 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Ba2+, one Cu2+, and one P5+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to three equivalent Ba2+ and one P5+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Ba2+ and one P5+ atom.

36 MATERIALS SCIENCE↗

Materials Data on BaNa2Mg(PO4)2 by Materials Project

Na2BaMgP2O8 crystallizes in the trigonal P-3m1 space group. The structure is three-dimensional. Na1+ is bonded in a 1-coordinate geometry to ten O2- atoms. There are a spread of Na–O bond distances ranging from 2.43–2.93 Å. Ba2+ is bonded to twelve O2- atoms to form BaO12 cuboctahedra that share edges with six equivalent BaO12 cuboctahedra, edges with six equivalent PO4 tetrahedra, and faces with two equivalent MgO6 octahedra. There are six shorter (2.81 Å) and six longer (3.11 Å) Ba–O bond lengths. Mg2+ is bonded to six equivalent O2- atoms to form MgO6 octahedra that share corners with six equivalent PO4 tetrahedra and faces with two equivalent BaO12 cuboctahedra. All Mg–O bond lengths are 2.08 Å. P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with three equivalent MgO6 octahedra and edges with three equivalent BaO12 cuboctahedra. The corner-sharing octahedral tilt angles are 17°. There is one shorter (1.54 Å) and three longer (1.56 Å) P–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted linear geometry to one Na1+, three equivalent Ba2+, and one P5+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to three equivalent Na1+, one Ba2+, one Mg2+, and one P5+ atom.

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