DOE OSTI2020
K2Sc2WP2O12 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are eight inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of K–O bond distances ranging from 2.79–3.38 Å. In the second K1+ site, K1+ is bonded in a 3-coordinate geometry to three O2- atoms. There are one shorter (2.90 Å) and two longer (2.98 Å) K–O bond lengths. In the third K1+ site, K1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of K–O bond distances ranging from 2.83–3.37 Å. In the fourth K1+ site, K1+ is bonded in a 2-coordinate geometry to five O2- atoms. There are a spread of K–O bond distances ranging from 2.87–3.24 Å. In the fifth K1+ site, K1+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of K–O bond distances ranging from 2.95–3.31 Å. In the sixth K1+ site, K1+ is bonded in a 1-coordinate geometry to nine O2- atoms. There are a spread of K–O bond distances ranging from 2.82–3.31 Å. In the seventh K1+ site, K1+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of K–O bond distances ranging from 2.85–3.24 Å. In the eighth K1+ site, K1+ is bonded in a 2-coordinate geometry to eleven O2- atoms. There are a spread of K–O bond distances ranging from 2.83–3.41 Å. There are eight inequivalent Sc3+ sites. In the first Sc3+ site, Sc3+ is bonded to six O2- atoms to form distorted ScO6 octahedra that share corners with three WO4 tetrahedra and corners with three PO4 tetrahedra. There are a spread of Sc–O bond distances ranging from 2.01–2.17 Å. In the second Sc3+ site, Sc3+ is bonded to six O2- atoms to form ScO6 octahedra that share corners with two WO4 tetrahedra and corners with four PO4 tetrahedra. There are a spread of Sc–O bond distances ranging from 2.08–2.12 Å. In the third Sc3+ site, Sc3+ is bonded to six O2- atoms to form ScO6 octahedra that share corners with two WO4 tetrahedra and corners with four PO4 tetrahedra. There are a spread of Sc–O bond distances ranging from 2.04–2.16 Å. In the fourth Sc3+ site, Sc3+ is bonded to six O2- atoms to form ScO6 octahedra that share a cornercorner with one WO4 tetrahedra and corners with five PO4 tetrahedra. There are a spread of Sc–O bond distances ranging from 2.08–2.17 Å. In the fifth Sc3+ site, Sc3+ is bonded to six O2- atoms to form ScO6 octahedra that share corners with three WO4 tetrahedra and corners with three PO4 tetrahedra. There are a spread of Sc–O bond distances ranging from 2.03–2.21 Å. In the sixth Sc3+ site, Sc3+ is bonded to six O2- atoms to form ScO6 octahedra that share corners with two WO4 tetrahedra and corners with four PO4 tetrahedra. There are a spread of Sc–O bond distances ranging from 2.03–2.21 Å. In the seventh Sc3+ site, Sc3+ is bonded to six O2- atoms to form ScO6 octahedra that share a cornercorner with one WO4 tetrahedra and corners with five PO4 tetrahedra. There are a spread of Sc–O bond distances ranging from 2.10–2.16 Å. In the eighth Sc3+ site, Sc3+ is bonded to six O2- atoms to form ScO6 octahedra that share corners with two WO4 tetrahedra and corners with four PO4 tetrahedra. There are a spread of Sc–O bond distances ranging from 2.05–2.17 Å. There are four inequivalent W6+ sites. In the first W6+ site, W6+ is bonded to four O2- atoms to form WO4 tetrahedra that share corners with four ScO6 octahedra. The corner-sharing octahedra tilt angles range from 16–49°. There is three shorter (1.80 Å) and one longer (1.83 Å) W–O bond length. In the second W6+ site, W6+ is bonded to four O2- atoms to form WO4 tetrahedra that share corners with four ScO6 octahedra. The corner-sharing octahedra tilt angles range from 18–49°. There are a spread of W–O bond distances ranging from 1.79–1.82 Å. In the third W6+ site, W6+ is bonded to four O2- atoms to form WO4 tetrahedra that share corners with four ScO6 octahedra. The corner-sharing octahedra tilt angles range from 12–49°. There are a spread of W–O bond distances ranging from 1.79–1.83 Å. In the fourth W6+ site, W6+ is bonded to four O2- atoms to form WO4 tetrahedra that share corners with four ScO6 octahedra. The corner-sharing octahedra tilt angles range from 15–52°. There are a spread of W–O bond distances ranging from 1.79–1.82 Å. There are eight inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four ScO6 octahedra. The corner-sharing octahedra tilt angles range from 20–43°. There is three shorter (1.55 Å) and one 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 ScO6 octahedra. The corner-sharing octahedra tilt angles range from 6–45°. There are a spread of P–O bond distances ranging from 1.55–1.57 Å. In the third P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four ScO6 octahedra. The corner-sharing octahedra tilt angles range from 9–45°. There is three shorter (1.55 Å) and one longer (1.57 Å) P–O bond length. In the fourth P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four ScO6 octahedra. The corner-sharing octahedra tilt angles range from 13–42°. There is two shorter (1.55 Å) and two longer (1.56 Å) P–O bond length. In the fifth P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four ScO6 octahedra. The corner-sharing octahedra tilt angles range from 18–47°. There is one shorter (1.54 Å) and three longer (1.55 Å) P–O bond length. In the sixth P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four ScO6 octahedra. The corner-sharing octahedra tilt angles range from 21–50°. All P–O bond lengths are 1.55 Å. In the seventh P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four ScO6 octahedra. The corner-sharing octahedra tilt angles range from 7–44°. There is three shorter (1.55 Å) and one longer (1.57 Å) P–O bond length. In the eighth P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four ScO6 octahedra. The corner-sharing octahedra tilt angles range from 16–46°. There is two shorter (1.55 Å) and two longer (1.56 Å) P–O bond length. There are forty-eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one K1+, one Sc3+, and one W6+ atom. In the second O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one K1+, one Sc3+, and one W6+ atom. In the third O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one K1+, one Sc3+, and one W6+ atom. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to one K1+, one Sc3+, and one W6+ atom. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to one K1+, one Sc3+, and one P5+ atom. In the sixth O2- site, O2- is bonded in a 2-coordinate geometry to one K1+, one Sc3+, and one P5+ atom. In the seventh O2- site, O2- is bonded in a 2-coordinate geometry to one K1+, one Sc3+, and one P5+ atom. In the eighth O2- site, O2- is bonded in a 2-coordinate geometry to one K1+, one Sc3+, and one P5+ atom. In the ninth O2- site, O2- is bonded in a 3-coordinate geometry to one K1+, one Sc3+, and one P5+ atom. In the tenth O2- site, O2- is bonded in a 2-coordinate geometry to one K1+, one Sc3+, and one P5+ atom. In the eleventh O2- site, O2- is bonded in a 2-coordinate geometry to one K1+, one Sc3+, and one P5+ atom. In the twelfth O2- site, O2- is bonded in a 3-coordinate geometry to one K1+, one Sc3+, and one P5+ atom. In the thirteenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one K1+, one Sc3+, and one W6+ atom. In the fourteenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one K1+, one Sc3+, and one W6+ atom. In the fifteenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one K1+, one Sc3+, and one W6+ atom. In the sixteenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one K1+, one Sc3+, and one W6+ atom. In the seventeenth O2- site, O2- is bonded in a bent 150 degrees geometry to one K1+, one Sc3+, and one P5+ atom. In the eighteenth O2- site, O2- is bonded in a 2-coordinate geometry to one K1+, one Sc3+, and one P5+ atom. In the nineteenth O2- site, O2- is bonded in a 2-coordinate geometry to one K1+, one Sc3+, and one P5+ atom. In the twentieth O2- site, O2- is bonded in a 2-coordinate geometry to one K1+, one Sc3+, and one P5+ atom. In the twenty-first O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one K1+, one Sc3+, and one P5+ atom. In the twenty-second O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one K1+, one Sc3+, and one P5+ atom. In the twenty-third O2- site, O2- is bonded in a 3-coordinate geometry to one K1+, one Sc3+, and one P5+ atom. In the twenty-fourth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one K1+, one Sc3+, and one P5+ atom. In the twenty-fifth O2- site, O2- is bonded in a bent 150 degrees geometry to one Sc3+ and one W6+ atom. In the twenty-sixth O2- site, O2- is bonded in a bent 150 degrees geometry to one Sc3+ and one W6+ atom. In the twenty-seventh O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one K1+, one Sc3+, and one W6+ atom. In the twenty-eighth O2- site, O2- is bonded in a bent 150 degrees geometry to two K1+, one Sc3+, and one W6+ atom. In the twenty-ninth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one K1+, one Sc3+, and one P5+ atom. In the thirtieth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two K1+, one Sc3+, and one P5+ atom. In the thirty-first O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one K1+, one Sc3+, and one P5+ atom. In the thirty-second O2- site, O2- is bonded in a bent 150 degrees geometry to two K1+, one Sc3+, and one P5+ atom. In the thirty-third O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two K1+, one Sc3+, and one P5+ atom. In the thirty-fourth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two K1+, one Sc3+, and one P5+ atom. In the thirty-fifth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two K1+, one Sc3+, and one P5+ atom. In the thirty-sixth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to three K1+, one Sc3+, and one P5+ atom. In the thirty-seventh O2- site, O2- is bonded in a distorted linear geometry to one K1+, one Sc3+, and one W6+ atom. In the thirty-eighth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two K1+, one Sc3+, and one W6+ atom. In the thirty-ninth O2- site, O2- is bonded in a distorted linear geometry to two K1+, one Sc3+, and one W6+ atom. In the fortieth O2- site, O2- is bonded in a distorted linear geometry to two K1+, one Sc3+, and one W6+ atom. In the forty-first O2- site, O2- is bonded in a 2-coordinate geometry to two K1+, one Sc3+, and one P5+ atom. In the forty-second O2- site, O2- is bonded in a distorted linear geometry to two K1+, one Sc3+, and one P5+ atom. In the forty-third O2- site, O2- is bonded in a distorted linear geometry to one K1+, one Sc3+, and one P5+ atom. In the forty-fourth O2- site, O2- is bonded in a distorted linear geometry to two K1+, one Sc3+, and one P5+ atom. In the forty-fifth O2- site, O2- is bonded in a 2-coordinate geometry to one K1+, one Sc3+, and one P5+ atom. In the forty-sixth O2- site, O2- is bonded in a 2-coordinate geometry to two K1+, one Sc3+, and one P5+ atom. In the forty-seventh O2- site, O2- is bonded in a distorted linear geometry to one K1+, one Sc3+, and one P5+ atom. In the forty-eighth O2- site, O2- is bonded in a 2-coordinate geometry to two K1+, one Sc3+, and one P5+ atom.