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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on KPb2Cl5 by Materials Project

KPb2Cl5 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. K1+ is bonded in a 9-coordinate geometry to nine Cl1- atoms. There are a spread of K–Cl bond distances ranging from 3.24–3.86 Å. There are two inequivalent Pb2+ sites. In the first Pb2+ site, Pb2+ is bonded in a 8-coordinate geometry to eight Cl1- atoms. There are a spread of Pb–Cl bond distances ranging from 2.88–3.60 Å. In the second Pb2+ site, Pb2+ is bonded to seven Cl1- atoms to form distorted edge-sharing PbCl7 pentagonal bipyramids. There are a spread of Pb–Cl bond distances ranging from 2.87–3.25 Å. There are five inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded to four Pb2+ atoms to form distorted ClPb4 trigonal pyramids that share corners with four equivalent ClK2Pb3 trigonal bipyramids, corners with two equivalent ClPb4 trigonal pyramids, an edgeedge with one ClK2Pb3 trigonal bipyramid, and an edgeedge with one ClPb4 trigonal pyramid. In the second Cl1- site, Cl1- is bonded to two equivalent K1+ and three Pb2+ atoms to form distorted ClK2Pb3 trigonal bipyramids that share corners with four equivalent ClPb4 trigonal pyramids, edges with two equivalent ClK2Pb3 trigonal bipyramids, and an edgeedge with one ClPb4 trigonal pyramid. In the third Cl1- site, Cl1- is bonded in a 4-coordinate geometry to three equivalent K1+ and two equivalent Pb2+ atoms. In the fourth Cl1- site, Cl1- is bonded in a 5-coordinate geometry to two equivalent K1+ and three Pb2+ atoms. In the fifth Cl1- site, Cl1- is bonded in a 4-coordinate geometry to two equivalent K1+ and three Pb2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K3(PbCl4)2 by Materials Project

K3(PbCl4)2 is beta indium sulfide-derived structured and crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are three inequivalent K sites. In the first K site, K is bonded to six Cl atoms to form KCl6 octahedra that share corners with six equivalent KCl6 octahedra, edges with two equivalent KCl6 octahedra, and edges with four PbCl6 octahedra. The corner-sharing octahedra tilt angles range from 14–18°. There are a spread of K–Cl bond distances ranging from 3.20–3.25 Å. In the second K site, K is bonded to six Cl atoms to form KCl6 octahedra that share edges with four KCl6 octahedra and edges with four PbCl6 octahedra. There are a spread of K–Cl bond distances ranging from 3.08–3.28 Å. In the third K site, K is bonded to six Cl atoms to form KCl6 octahedra that share corners with six equivalent KCl6 octahedra, edges with two equivalent KCl6 octahedra, and edges with four PbCl6 octahedra. The corner-sharing octahedra tilt angles range from 14–18°. There are a spread of K–Cl bond distances ranging from 3.15–3.25 Å. There are two inequivalent Pb sites. In the first Pb site, Pb is bonded to six Cl atoms to form PbCl6 octahedra that share edges with two equivalent PbCl6 octahedra and edges with six KCl6 octahedra. There are a spread of Pb–Cl bond distances ranging from 2.85–2.98 Å. In the second Pb site, Pb is bonded to six Cl atoms to form PbCl6 octahedra that share edges with two equivalent PbCl6 octahedra and edges with six KCl6 octahedra. There are a spread of Pb–Cl bond distances ranging from 2.72–2.82 Å. There are four inequivalent Cl sites. In the first Cl site, Cl is bonded in a see-saw-like geometry to three K and one Pb atom. In the second Cl site, Cl is bonded to three K and one Pb atom to form corner-sharing ClK3Pb trigonal pyramids. In the third Cl site, Cl is bonded in a rectangular see-saw-like geometry to two K and two Pb atoms. In the fourth Cl site, Cl is bonded in a distorted T-shaped geometry to one K and two Pb atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K2PbCl5 by Materials Project

K2PbCl5 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. K is bonded in a 8-coordinate geometry to eight Cl atoms. There are a spread of K–Cl bond distances ranging from 3.18–3.44 Å. Pb is bonded to seven Cl atoms to form distorted edge-sharing PbCl7 pentagonal bipyramids. There are a spread of Pb–Cl bond distances ranging from 2.76–2.89 Å. There are four inequivalent Cl sites. In the first Cl site, Cl is bonded to four equivalent K and one Pb atom to form ClK4Pb trigonal bipyramids that share corners with nine ClK4Pb trigonal bipyramids, corners with eight equivalent ClK2Pb2 trigonal pyramids, edges with five ClK4Pb trigonal bipyramids, edges with two equivalent ClK2Pb2 trigonal pyramids, and a faceface with one ClK4Pb trigonal bipyramid. In the second Cl site, Cl is bonded to two equivalent K and two equivalent Pb atoms to form ClK2Pb2 trigonal pyramids that share corners with eight ClK4Pb trigonal bipyramids, corners with six equivalent ClK2Pb2 trigonal pyramids, edges with five ClK4Pb trigonal bipyramids, and an edgeedge with one ClK2Pb2 trigonal pyramid. In the third Cl site, Cl is bonded to four equivalent K and one Pb atom to form ClK4Pb trigonal bipyramids that share corners with nine ClK4Pb trigonal bipyramids, corners with four equivalent ClK2Pb2 trigonal pyramids, edges with five ClK4Pb trigonal bipyramids, edges with four equivalent ClK2Pb2 trigonal pyramids, and a faceface with one ClK4Pb trigonal bipyramid. In the fourth Cl site, Cl is bonded to four equivalent K and one Pb atom to form distorted ClK4Pb trigonal bipyramids that share corners with ten ClK4Pb trigonal bipyramids, corners with four equivalent ClK2Pb2 trigonal pyramids, edges with six ClK4Pb trigonal bipyramids, and edges with four equivalent ClK2Pb2 trigonal pyramids.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K2PbCl6 by Materials Project

K2PbCl6 crystallizes in the monoclinic P2_1/c 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 3.32–3.62 Å. Pb4+ is bonded in an octahedral geometry to six Cl1- atoms. There are two shorter (2.57 Å) and four longer (2.58 Å) Pb–Cl bond lengths. There are three inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a 4-coordinate geometry to three equivalent K1+ and one Pb4+ atom. In the second Cl1- site, Cl1- is bonded in a 4-coordinate geometry to three equivalent K1+ and one Pb4+ atom. In the third Cl1- site, Cl1- is bonded in a 3-coordinate geometry to two equivalent K1+ and one Pb4+ atom.

36 MATERIALS SCIENCE↗