Crystal structure refinement of bifluorides MHF₂ (M = Na, NH₄, Rb). Crystal structures of Rb₅F₄(HF₂) · 2H₂O and RbF · H₂O

Author: Troyanov, S.

Source: Crystallography Reports, Volume 50, Number 5, September 2005 , pp. 773-778(6)

Publisher: MAIK Nauka/Interperiodica

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Abstract:

The crystal structures of alkali metal and ammonium bifluorides MHF₂ (M = Na, NH₄, or Rb) are refined using single-crystal X-ray diffraction. In all the crystals of acid fluorides studied, HF ₂ ^t- anions have a linear structure with F…F distances ranging from 2.277 to 2.281 Å. The crystal structures of the Rb₅F₄(HF₂) · 2H₂O and RbF · H₂O compounds are determined. It is established that, in these structures, the O-H…F hydrogen bonds whose lengths are equal to 2.55–2.57 and 2.63 Å participate in the formation of trinuclear bent anions and zigzag anionic chains, respectively.

Document Type: Research article

DOI: http://dx.doi.org/10.1134/1.2049394

Affiliations: 1: Email: troyanov@thermo.chem.msu.ru

Publication date: 2005-09-01