DOI: 10.1515/zkri-2023-0046 ISSN: 2194-4946

High-pressure/high-temperature synthesis of the first walstromite-analogue borate Tm2CrB3O9

Tobias A. Teichtmeister, Stefan Schwarzmüller, Klaus Wurst, Gunter Heymann, Hubert Huppertz
  • Inorganic Chemistry
  • Condensed Matter Physics
  • General Materials Science

Abstract

Tm2CrB3O9 was obtained by high-pressure/high-temperature syntheses at 7.5 GPa and 850 °C. The compound crystallizes homeotypically to walstromite in the triclinic space group

P 1 ¯ $P\bar{1}$
(no. 2) with the unit cell parameters a = 5.9118(4) Å, b = 5.9148(4) Å, c = 8.3575(6) Å, α = 83.64(1)°, β = 71.19(1)°, and γ = 79.93(1)°, and two formula units per cell. Single-crystal and powder diffraction data are accompanied by an infrared spectroscopic investigation and the structural features of this new compound are discussed in detail.

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