Rb[SbO(OH) 4 ]—A Novel Structural Setup for the Anion in Alkali Metal Hydroxidoantimonates(V)
Year: 2024
Type: article
Abstract: Rb[SbO(OH) 4 ] was prepared under hydrothermal conditions at pH ≈10. The crystal structure was determined at −173 °C on basis of X‐ray data from a twinned crystal ( P 2 1 , Z = 2, a = 5.6579(4), b = 7.2961(5), c = 5.6472(5) Å, β = 92.032(6)°; R 1 = 0.0309, wR 2 = 0.0903 for all data). In comparison with the crystal structures of other alkali hydroxidoantimonates(V), a novel polymeric anion [SbO 2/2 (OH) 4/1 ] − is present, which is made up of [SbO 2 (OH) 4 ] octahedra vertex‐sharing the trans‐aligned O atoms. All OH groups act as donor and acceptor groups of inter‐ and intra‐chain hydrogen bonds of moderate strengths. The Rb + cations are situated between the chains and are bound to twelve O atoms from two O 2− and ten OH groups. The dehydration process of Rb[SbO(OH) 4 ] starts at ≈280 °C and yields RbSbO 3 as the final product at 900 °C. Vibrational spectra (infrared and Raman) show characteristic bands for the OH and SbO(H) vibrations.
Institution: TU Wien
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,840
OpenAlex ID: W4405076976