DOE OSTI2020
K2Sc2Mo(PO6)2 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 10-coordinate geometry to ten O2- atoms. There are a spread of K–O bond distances ranging from 2.94–3.31 Å. In the second 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 2.81–3.33 Å. In the third 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 2.84–3.24 Å. In the fourth K1+ site, K1+ is bonded in a 2-coordinate geometry to twelve O2- atoms. There are a spread of K–O bond distances ranging from 2.82–3.48 Å. In the fifth 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 2.78–3.37 Å. In the sixth K1+ site, K1+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of K–O bond distances ranging from 2.89–2.97 Å. In the seventh 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 2.82–3.37 Å. In the eighth 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 2.86–3.23 Å. There are eight inequivalent Sc3+ sites. In the first Sc3+ site, Sc3+ is bonded to six O2- atoms to form ScO6 octahedra that share corners with three MoO4 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 second Sc3+ site, Sc3+ is bonded to six O2- atoms to form ScO6 octahedra that share corners with two MoO4 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 third Sc3+ site, Sc3+ is bonded to six O2- atoms to form ScO6 octahedra that share a cornercorner with one MoO4 tetrahedra and corners with five PO4 tetrahedra. There are a spread of Sc–O bond distances ranging from 2.09–2.17 Å. In the fourth Sc3+ site, Sc3+ is bonded to six O2- atoms to form ScO6 octahedra that share corners with two MoO4 tetrahedra and corners with four PO4 tetrahedra. There are a spread of Sc–O bond distances ranging from 2.05–2.17 Å. In the fifth Sc3+ site, Sc3+ is bonded to six O2- atoms to form ScO6 octahedra that share corners with three MoO4 tetrahedra and corners with three PO4 tetrahedra. There are a spread of Sc–O bond distances ranging from 2.00–2.17 Å. In the sixth Sc3+ site, Sc3+ is bonded to six O2- atoms to form ScO6 octahedra that share corners with two MoO4 tetrahedra and corners with four PO4 tetrahedra. There are a spread of Sc–O bond distances ranging from 2.09–2.11 Å. In the seventh Sc3+ site, Sc3+ is bonded to six O2- atoms to form ScO6 octahedra that share corners with two MoO4 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 eighth Sc3+ site, Sc3+ is bonded to six O2- atoms to form ScO6 octahedra that share a cornercorner with one MoO4 tetrahedra and corners with five PO4 tetrahedra. There are a spread of Sc–O bond distances ranging from 2.08–2.16 Å. There are four inequivalent Mo6+ sites. In the first Mo6+ site, Mo6+ is bonded to four O2- atoms to form MoO4 tetrahedra that share corners with four ScO6 octahedra. The corner-sharing octahedra tilt angles range from 17–48°. There is three shorter (1.78 Å) and one longer (1.81 Å) Mo–O bond length. In the second Mo6+ site, Mo6+ is bonded to four O2- atoms to form MoO4 tetrahedra that share corners with four ScO6 octahedra. The corner-sharing octahedra tilt angles range from 18–49°. There are a spread of Mo–O bond distances ranging from 1.77–1.80 Å. In the third Mo6+ site, Mo6+ is bonded to four O2- atoms to form MoO4 tetrahedra that share corners with four ScO6 octahedra. The corner-sharing octahedra tilt angles range from 12–49°. There is three shorter (1.78 Å) and one longer (1.81 Å) Mo–O bond length. In the fourth Mo6+ site, Mo6+ is bonded to four O2- atoms to form MoO4 tetrahedra that share corners with four ScO6 octahedra. The corner-sharing octahedra tilt angles range from 15–52°. There is one shorter (1.77 Å) and three longer (1.79 Å) Mo–O bond length. 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 20–44°. There are a spread of P–O bond distances ranging from 1.54–1.56 Å. 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 is three shorter (1.55 Å) and one longer (1.56 Å) P–O bond length. 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 10–45°. There is three shorter (1.55 Å) and one longer (1.56 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 18–48°. There is two shorter (1.54 Å) and two 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 16–47°. 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 2-coordinate geometry to one K1+, one Sc3+, and one Mo6+ atom. In the second O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two K1+, one Sc3+, and one Mo6+ atom. In the third O2- site, O2- is bonded in a distorted linear geometry to two K1+, one Sc3+, and one Mo6+ atom. In the fourth O2- site, O2- is bonded in a distorted linear geometry to two K1+, one Sc3+, and one Mo6+ atom. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to two K1+, one Sc3+, and one P5+ atom. In the sixth O2- site, O2- is bonded in a distorted linear geometry to two K1+, one Sc3+, and one P5+ atom. In the seventh O2- site, O2- is bonded in a distorted linear geometry to one K1+, one Sc3+, and one P5+ atom. In the eighth O2- site, O2- is bonded in a distorted linear geometry to two K1+, one Sc3+, and one P5+ atom. In the ninth O2- site, O2- is bonded in a 2-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 two K1+, one Sc3+, and one P5+ atom. In the eleventh O2- site, O2- is bonded in a distorted linear geometry to one K1+, one Sc3+, and one P5+ atom. In the twelfth O2- site, O2- is bonded in a 2-coordinate geometry to two K1+, one Sc3+, and one P5+ atom. In the thirteenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Sc3+ and one Mo6+ atom. In the fourteenth O2- site, O2- is bonded in a bent 150 degrees geometry to one Sc3+ and one Mo6+ atom. In the fifteenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one K1+, one Sc3+, and one Mo6+ atom. In the sixteenth O2- site, O2- is bonded in a bent 150 degrees geometry to two K1+, one Sc3+, and one Mo6+ atom. In the seventeenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one K1+, one Sc3+, and one P5+ atom. In the eighteenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two K1+, one Sc3+, and one P5+ atom. In the nineteenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one K1+, one Sc3+, and one P5+ atom. In the twentieth O2- site, O2- is bonded in a bent 150 degrees geometry to two K1+, one Sc3+, and one P5+ atom. In the twenty-first O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two K1+, one Sc3+, and one P5+ atom. In the twenty-second O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two K1+, one Sc3+, and one P5+ atom. In the twenty-third O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two K1+, one Sc3+, and one P5+ atom. In the twenty-fourth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to three K1+, one Sc3+, and one P5+ atom. In the twenty-fifth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one K1+, one Sc3+, and one Mo6+ atom. In the twenty-sixth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one K1+, one Sc3+, and one Mo6+ atom. In the twenty-seventh O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one K1+, one Sc3+, and one Mo6+ atom. In the twenty-eighth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one K1+, one Sc3+, and one Mo6+ 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 2-coordinate geometry to one K1+, one Sc3+, and one P5+ atom. In the thirty-first O2- site, O2- is bonded in a 2-coordinate geometry to one K1+, one Sc3+, and one P5+ atom. In the thirty-second O2- site, O2- is bonded in a 2-coordinate geometry to one K1+, one Sc3+, and one P5+ atom. In the thirty-third O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one K1+, one Sc3+, and one P5+ atom. In the thirty-fourth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one K1+, one Sc3+, and one P5+ atom. In the thirty-fifth O2- site, O2- is bonded in a 3-coordinate geometry to one K1+, one Sc3+, and one P5+ atom. In the thirty-sixth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one K1+, one Sc3+, and one P5+ atom. In the thirty-seventh O2- site, O2- is bonded in a 3-coordinate geometry to one K1+, one Sc3+, and one Mo6+ atom. In the thirty-eighth O2- site, O2- is bonded in a 3-coordinate geometry to one K1+, one Sc3+, and one Mo6+ atom. In the thirty-ninth O2- site, O2- is bonded in a 3-coordinate geometry to one K1+, one Sc3+, and one Mo6+ atom. In the fortieth O2- site, O2- is bonded in a 3-coordinate geometry to one K1+, one Sc3+, and one Mo6+ atom. In the forty-first O2- site, O2- is bonded in a 3-coordinate geometry to one K1+, one Sc3+, and one P5+ atom. In the forty-second O2- site, O2- is bonded in a 2-coordinate geometry to one K1+, one Sc3+, and one P5+ atom. In the forty-third O2- site, O2- is bonded in a 3-coordinate geometry to one K1+, one Sc3+, and one P5+ atom. In the forty-fourth O2- site, O2- is bonded in a 2-coordinate geometry to one K1+, one Sc3+, and one P5+ atom. In the forty-fifth O2- site, O2- is bonded in a 3-coordinate geometry to two K1+, one Sc3+, and one P5+ atom. In the forty-sixth O2- site, O2- is bonded in a 2-coordinate geometry to one K1+, one Sc3+, and one P5+ atom. In the forty-seventh O2- site, O2- is bonded in a 2-coordinate geometry to one K1+, one Sc3+, and one P5+ atom. In the forty-eighth O2- site, O2- is bonded in a 3-coordinate geometry to one K1+, one Sc3+, and one P5+ atom.