Materials Data on KTb2Cl7 by Materials Project
KTb2Cl7 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 3.29–3.83 Å. There are two inequivalent Tb3+ sites. In the first Tb3+ site, Tb3+ is bonded to seven Cl1- atoms to form a mixture of distorted edge and face-sharing TbCl7 pentagonal bipyramids. There are a spread of Tb–Cl bond distances ranging from 2.69–2.78 Å. In the second Tb3+ site, Tb3+ is bonded to seven Cl1- atoms to form a mixture of distorted edge and face-sharing TbCl7 pentagonal bipyramids. There are a spread of Tb–Cl bond distances ranging from 2.70–2.75 Å. There are seven inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a 2-coordinate geometry to one K1+ and two Tb3+ atoms. In the second Cl1- site, Cl1- is bonded in a distorted trigonal non-coplanar geometry to one K1+ and two Tb3+ atoms. In the third Cl1- site, Cl1- is bonded in a 3-coordinate geometry to two equivalent K1+ and two Tb3+ atoms. In the fourth Cl1- site, Cl1- is bonded in a 2-coordinate geometry to two equivalent K1+ and two Tb3+ atoms. In the fifth Cl1- site, Cl1- is bonded in a distorted L-shaped geometry to one K1+ and two Tb3+ atoms. In the sixth Cl1- site, Cl1- is bonded in a distorted water-like geometry to one K1+ and two Tb3+ atoms. In the seventh Cl1- site, Cl1- is bonded in a distorted trigonal non-coplanar geometry to one K1+ and two Tb3+ atoms.