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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Rb2TbF6 by Materials Project

Rb2TbF6 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. Rb1+ is bonded in a 10-coordinate geometry to ten F1- atoms. There are a spread of Rb–F bond distances ranging from 2.90–3.39 Å. Tb4+ is bonded in a 8-coordinate geometry to eight F1- atoms. There are a spread of Tb–F bond distances ranging from 2.26–2.35 Å. There are three inequivalent F1- sites. In the first F1- site, F1- is bonded in a 2-coordinate geometry to two equivalent Rb1+ and two equivalent Tb4+ atoms. In the second F1- site, F1- is bonded in a 1-coordinate geometry to four equivalent Rb1+ and one Tb4+ atom. In the third F1- site, F1- is bonded in a 1-coordinate geometry to four equivalent Rb1+ and one Tb4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Rb3TbF6 by Materials Project

Rb3TbF6 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent Rb1+ sites. In the first Rb1+ site, Rb1+ is bonded in a 8-coordinate geometry to four equivalent F1- atoms. All Rb–F bond lengths are 2.80 Å. In the second Rb1+ site, Rb1+ is bonded in a linear geometry to two equivalent F1- atoms. Both Rb–F bond lengths are 2.59 Å. Tb3+ is bonded in an octahedral geometry to six F1- atoms. There are four shorter (2.19 Å) and two longer (2.23 Å) Tb–F bond lengths. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded in a distorted trigonal planar geometry to two equivalent Rb1+ and one Tb3+ atom. In the second F1- site, F1- is bonded in a linear geometry to one Rb1+ and one Tb3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on RbTb3F10 by Materials Project

RbTb3F10 crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Rb1+ is bonded to sixteen F1- atoms to form distorted edge-sharing RbF16 tetrahedra. There are four shorter (2.85 Å) and twelve longer (3.27 Å) Rb–F bond lengths. Tb3+ is bonded in a 8-coordinate geometry to eight F1- atoms. There are four shorter (2.24 Å) and four longer (2.39 Å) Tb–F bond lengths. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded in a bent 150 degrees geometry to two equivalent Rb1+ and two equivalent Tb3+ atoms. In the second F1- site, F1- is bonded to one Rb1+ and three equivalent Tb3+ atoms to form a mixture of distorted edge and corner-sharing FRbTb3 tetrahedra.

36 MATERIALS SCIENCE↗