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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on TaCl4F by Materials Project

TaCl4F crystallizes in the tetragonal I-4 space group. The structure is zero-dimensional and consists of two TaCl4F clusters. Ta5+ is bonded to four Cl1- and two equivalent F1- atoms to form corner-sharing TaCl4F2 octahedra. The corner-sharing octahedral tilt angles are 9°. There are two shorter (2.27 Å) and two longer (2.32 Å) Ta–Cl bond lengths. Both Ta–F bond lengths are 2.11 Å. There are four inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a single-bond geometry to one Ta5+ atom. In the second Cl1- site, Cl1- is bonded in a single-bond geometry to one Ta5+ atom. In the third Cl1- site, Cl1- is bonded in a single-bond geometry to one Ta5+ atom. In the fourth Cl1- site, Cl1- is bonded in a single-bond geometry to one Ta5+ atom. F1- is bonded in a linear geometry to two equivalent Ta5+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on TaClF8 by Materials Project

TaClF8 crystallizes in the orthorhombic Pcca space group. The structure is one-dimensional and consists of two TaClF8 ribbons oriented in the (0, 1, 0) direction. Ta is bonded in an octahedral geometry to six F atoms. There are a spread of Ta–F bond distances ranging from 1.88–2.01 Å. Cl is bonded in a square co-planar geometry to four F atoms. There is two shorter (1.63 Å) and two longer (2.18 Å) Cl–F bond length. There are four inequivalent F sites. In the first F site, F is bonded in a single-bond geometry to one Ta atom. In the second F site, F is bonded in a single-bond geometry to one Cl atom. In the third F site, F is bonded in a single-bond geometry to one Ta atom. In the fourth F site, F is bonded in a bent 150 degrees geometry to one Ta and one Cl atom.

36 MATERIALS SCIENCE↗