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Digitale Medien

The monoclinic and cubic phases of metaboric acid (precise redeterminations) (2000)

Freyhardt, Clemens C. ; Wiebcke, Michael ; Felsche, Jürgen

Oxford [u.a.] : International Union of Crystallography (IUCr)

Acta crystallographica 56 (2000), S. 276-278

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Details

ISSN: 1600-5759

Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001

Thema: Chemie und Pharmazie , Geologie und Paläontologie , Physik

Notizen: In monoclinic β-HBO2, endless [B3O3(OH)(H2O)(O2/2)] zigzag chains are linked via an extensive system of hydrogen bonds with stronger major [H...O between 1.67 (1) and 1.77 (1) Å] and weaker minor components [H...O between 2.48 (1) and 2.63 (1) Å]. The unique three-dimensional tetrahedral [BO2/2O2/2(H)] network structure of cubic γ-HBO2 is stabilized by very short asymmetric hydrogen bonds [H...O2 1.48 (1) Å] with a donor–acceptor distance of 2.485 (1) Å and possesses small empty cages with a free diameter of ca 3.2 Å.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1107/S0108270199016042

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