DOE OSTI2020
K3Sc(MoO4)3 crystallizes in the orthorhombic Pca2_1 space group. The structure is three-dimensional. there are three inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of K–O bond distances ranging from 2.64–3.02 Å. In the second K1+ site, K1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of K–O bond distances ranging from 2.70–3.29 Å. In the third 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 2.73–3.25 Å. Sc3+ is bonded to six O2- atoms to form ScO6 octahedra that share corners with six MoO4 tetrahedra. There are a spread of Sc–O bond distances ranging from 2.08–2.15 Å. There are three inequivalent Mo6+ sites. In the first Mo6+ site, Mo6+ is bonded to four O2- atoms to form MoO4 tetrahedra that share corners with two equivalent ScO6 octahedra. The corner-sharing octahedra tilt angles range from 31–40°. There are a spread of Mo–O bond distances ranging from 1.78–1.83 Å. In the second Mo6+ site, Mo6+ is bonded to four O2- atoms to form MoO4 tetrahedra that share corners with two equivalent ScO6 octahedra. The corner-sharing octahedra tilt angles range from 33–38°. There are a spread of Mo–O bond distances ranging from 1.78–1.83 Å. In the third Mo6+ site, Mo6+ is bonded to four O2- atoms to form MoO4 tetrahedra that share corners with two equivalent ScO6 octahedra. The corner-sharing octahedra tilt angles range from 27–34°. There are a spread of Mo–O bond distances ranging from 1.76–1.83 Å. There are twelve inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to one Sc3+ and one Mo6+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to two K1+ and one Mo6+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to one K1+, one Sc3+, and one Mo6+ atom. In the fourth O2- site, O2- is bonded in a bent 150 degrees geometry to one Sc3+ and one Mo6+ atom. In the fifth O2- site, O2- is bonded in a 1-coordinate geometry to two K1+ and one Mo6+ atom. In the sixth O2- site, O2- is bonded in a distorted single-bond geometry to three K1+ and one Mo6+ atom. In the seventh O2- site, O2- is bonded in a 1-coordinate geometry to two K1+ and one Mo6+ atom. In the eighth O2- site, O2- is bonded in a 3-coordinate geometry to one K1+, one Sc3+, and one Mo6+ atom. In the ninth O2- site, O2- is bonded in a 1-coordinate geometry to two K1+ and one Mo6+ atom. In the tenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one K1+, one Sc3+, and one Mo6+ atom. In the eleventh O2- site, O2- is bonded in a 4-coordinate geometry to three K1+ and one Mo6+ atom. In the twelfth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one K1+, one Sc3+, and one Mo6+ atom.