Rare-Earth Hydroxometalates Ba[RE(OH)5] with RE=Tb, Dy, Ho

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung


Colorless crystals of the new hydroxometalates Ba[RE(OH)5] with the rare-earth elements RE=Tb, Dy, Ho were synthesized under ultra-alkaline conditions in a KOH hydroflux at 200 °C. Single-crystal X-ray diffraction revealed that the three compounds crystallize isostructural in the monoclinic space group P21/n (no. 14). In the crystal structure, the rare-earth cations are coordinated by the oxygen atoms of seven hydroxide anions, which define a distorted pentagonal bipyramid. These polyhedra share edges of their basal ring forming infinite chains that run parallel to the [010] direction. Hydrogen bonds connect the chains into layers parallel to the (101) plane. The Ba2+ cations are located between these layers and surrounded by nine oxygen atoms. Ba[Dy(OH)5] is paramagnetic and shows no luminescence under UV light. When heated in synthetic air or argon, water is released in well-defined steps. Ba[Dy(OH)5] decomposes via DyOOH to Dy2O3, which then reacts with the remaining Ba(OH)2 to form BaDy2O4. Thus, the hydroxometalates can be used as carbon-free precursors for oxides.


FachzeitschriftZeitschrift fur Anorganische und Allgemeine Chemie
PublikationsstatusVeröffentlicht - 27 Dez. 2022

Externe IDs

Scopus 85141778463
WOS 000881051700001
Mendeley 81277ee7-f1f3-3dc0-a6c7-8eb7c7b3bc39
ORCID /0000-0002-2391-6025/work/142250227


DFG-Fachsystematik nach Fachkollegium

Fächergruppen, Lehr- und Forschungsbereiche, Fachgebiete nach Destatis

ASJC Scopus Sachgebiete


  • Crystal structure, Hydroflux synthesis, Hydroxometalates, Precursors, Rare earth compounds