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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on YBr3 by Materials Project

YBr3 is Aluminum trichloride structured and crystallizes in the monoclinic C2/m space group. The structure is two-dimensional and consists of one YBr3 sheet oriented in the (0, 0, 1) direction. Y3+ is bonded to six Br1- atoms to form edge-sharing YBr6 octahedra. All Y–Br bond lengths are 2.82 Å. There are two inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in an L-shaped geometry to two equivalent Y3+ atoms. In the second Br1- site, Br1- is bonded in an L-shaped geometry to two equivalent Y3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on YBr3 by Materials Project

YBr3 crystallizes in the hexagonal P6_3/mmc space group. The structure is one-dimensional and consists of two YBr3 ribbons oriented in the (0, 0, 1) direction. Y3+ is bonded to six equivalent Br1- atoms to form distorted face-sharing YBr6 pentagonal pyramids. All Y–Br bond lengths are 2.83 Å. Br1- is bonded in an L-shaped geometry to two equivalent Y3+ atoms.

36 MATERIALS SCIENCE↗
NASA NTRS1989

Reaction of nonaqueous halogen solutions with YBa2Cu3O(7-x)

The reaction of the surfaces of the new high-temperature superconductor YBa2Cu3O(7-x) with nonaqueous halogen solutions is investigated, and the species formed in the reactions are identified. Treatment of films with HF/EtOH (EtOH = HI in absolute ethanol) results in the formation of an oxyfluoride with Y:Ba:Cu relative concentrations of 1:4:3. Results of X-ray photoelectron spectroscopy of HF-treated films are consistent with the formation of CuF, a compound which does not exist in bulk form. Treatment of films with HCl/EtOH results primarily in the formation of BaCl2, with smaller amounts of YCl3, CuCl, and CuCl2. Treatment with Br2/EtOH or HBr/EtOH results in the formation of YBr3, BaBr2, and CuBr with relative concentrations of 1:4:3.

Vasquez, R. P.↗