New calcium perrhenates: synthesis and crystal structures of Ca(ReO<sub>4</sub>)<sub>2</sub> and K<sub>2</sub>Ca<sub>3</sub>(ReO<sub>4</sub>)<sub>8</sub>·4H<sub>2</sub>O
Abstract Single crystals of two new calcium perrhenates, anhydrous Ca(ReO 4 ) 2 ( 1 ) and K 2 Ca 3 (ReO 4 ) 8 ·4H 2 O ( 2 ), were prepared during solid-state and solution attempts to prepare the potassium analog of NaCa(ReO 4 ) 3 . Both structures can be regarded as frameworks comprised of vertex-sharing CaO 8 and ReO 4 polyhedra. 1 is a complete structural analog of Sr(ReO 4 ) 2 while 2 corresponds to its own structure type. It is also the first hydrated binary perrhenate to date. We discuss the similarities and differences in the structures of alkaline earth perrhenates and pertechnetates; existence of more complex and elegant metal-perrhenate architectures is predicted.
Authors
- Еvgeny V. Nazarchuk (ORCID: https://orcid.org/0000-0001-9827-0583)
- Oleg I. Siidra (ORCID: https://orcid.org/0000-0003-1908-3152)
- Anna S. Baikina
- Artem S. Borisov
- Dmitri Charkin
Institutions
- St Petersburg University (RU)
- Lomonosov Moscow State University (RU)
- Kola Science Centre (RU)
Publication Details
- Journal
- Zeitschrift für Kristallographie - Crystalline Materials
- Published
- 2025-04-29
- DOI
- https://doi.org/10.1515/zkri-2025-0008
- Primary Topic
- Chemical Synthesis and Characterization
- Type
- article
- Field-Weighted Citation Impact
- 0.00