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Materials Data on K3GdCl6 by Materials Project

K3GdCl6 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are three inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 8-coordinate geometry to eight Cl1- atoms. There are a spread of K–Cl bond distances ranging from 3.05–3.69 Å. In the second K1+ site, K1+ is bonded in a 9-coordinate geometry to nine Cl1- atoms. There are a spread of K–Cl bond distances ranging from 3.28–3.90 Å. In the third K1+ site, K1+ is bonded in a 8-coordinate geometry to eight Cl1- atoms. There are a spread of K–Cl bond distances ranging from 3.16–3.67 Å. There are two inequivalent Gd3+ sites. In the first Gd3+ site, Gd3+ is bonded in an octahedral geometry to six Cl1- atoms. There are a spread of Gd–Cl bond distances ranging from 2.67–2.70 Å. In the second Gd3+ site, Gd3+ is bonded in an octahedral geometry to six Cl1- atoms. There are a spread of Gd–Cl bond distances ranging from 2.63–2.71 Å. There are six inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a 4-coordinate geometry to four K1+ and one Gd3+ atom. In the second Cl1- site, Cl1- is bonded in a 5-coordinate geometry to five K1+ and one Gd3+ atom. In the third Cl1- site, Cl1- is bonded in a 1-coordinate geometry to four K1+ and one Gd3+ atom. In the fourth Cl1- site, Cl1- is bonded in a 5-coordinate geometry to four K1+ and one Gd3+ atom. In the fifth Cl1- site, Cl1- is bonded in a 5-coordinate geometry to four K1+ and one Gd3+ atom. In the sixth Cl1- site, Cl1- is bonded in a 5-coordinate geometry to four K1+ and one Gd3+ atom.

36 MATERIALS SCIENCE↗

Materials Data on K2GdCl5 by Materials Project

K2GdCl5 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. K1+ is bonded in a 8-coordinate geometry to eight Cl1- atoms. There are a spread of K–Cl bond distances ranging from 3.21–3.46 Å. Gd3+ is bonded to seven Cl1- atoms to form distorted edge-sharing GdCl7 pentagonal bipyramids. There are a spread of Gd–Cl bond distances ranging from 2.71–2.81 Å. There are four inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a 5-coordinate geometry to four equivalent K1+ and one Gd3+ atom. In the second Cl1- site, Cl1- is bonded in a 4-coordinate geometry to two equivalent K1+ and two equivalent Gd3+ atoms. In the third Cl1- site, Cl1- is bonded to four equivalent K1+ and one Gd3+ atom to form a mixture of distorted corner, edge, and face-sharing ClK4Gd trigonal bipyramids. In the fourth Cl1- site, Cl1- is bonded to four equivalent K1+ and one Gd3+ atom to form a mixture of distorted corner, edge, and face-sharing ClK4Gd trigonal bipyramids.

36 MATERIALS SCIENCE↗

Materials Data on K3GdCl6 by Materials Project

(K)2KGdCl6 crystallizes in the cubic Fm-3m space group. The structure is three-dimensional and consists of eight potassium molecules and one KGdCl6 framework. In the KGdCl6 framework, K1+ is bonded to six equivalent Cl1- atoms to form KCl6 octahedra that share corners with six equivalent GdCl6 octahedra. The corner-sharing octahedral tilt angles are 0°. All K–Cl bond lengths are 2.98 Å. Gd3+ is bonded to six equivalent Cl1- atoms to form GdCl6 octahedra that share corners with six equivalent KCl6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Gd–Cl bond lengths are 2.66 Å. Cl1- is bonded in a linear geometry to one K1+ and one Gd3+ atom.

36 MATERIALS SCIENCE↗