A new polymorph of Ba(AsO3OH): Synthesis, crystal structure and vibrational spectra

Објеката

Тип
Рад у часопису
Верзија рада
објављена верзија
Језик
енглески
Креатор
Tamara Đorđević, Ljiljana Karanović
Извор
Journal of Solid State Chemistry
Издавач
Elsevier BV
Датум издавања
2010
Сажетак
A new monoclinic polymorph of Ba(AsO3OH) was synthesized under hydrothermal conditions. It
represents a previously unknown structure type. Its crystal structure was determined from a racemic
twin using single-crystal X-ray diffraction data collected at 120 and 293 K [space group P21, a=7.2149(14)/7.2370(2), b=7.7028(15)/7.7133(2), c=21.7385(43)/21.8079(5) Å, β=95.95(3)/96.073(1)1,
V=1201.6(4)/1210.51(5) Å3, Z=12]. The crystal structure of P21-Ba(AsO3OH) has a layered character
and is built up of four types of regularly alternating layers parallel to (0 0 1). Every AsO3OH tetrahedron
is chelating to two Ba atoms and bridged by another two Ba atoms. Each OH group acts as hydrogen
bond donor toward the oxygen atoms positioned in the same or adjacent layers. Although the H atoms
could not be located, no ambiguities are present in the hydrogen-bonding scheme. Single-crystal
vibrational spectroscopy (FTIR and Raman) was used to describe the vibrational behavior of the
hydrogen bond system; particularly the spectroscopic manifestation of the very short and short
hydrogen bonds (2.462(7)–2.575(7) Å). In order to complement spectroscopic data on protonated orthoarsenates, infrared spectra of triclinic F1¯ -Sr(AsO3OH) and the orthorhombic variety of Pbca-Ba(AsO3OH) were recorded and discussed. Furthermore, structural features of other alkaline earth
hydrogen arsenates are discussed.
том
183
Број
12
почетак странице
2835
крај странице
2844
doi
10.1016/j.jssc.2010.09.027
issn
0022-4596
Subject
Ba(AsO3OH), хидротермална синтеза, структурна анализа монокристала, Раманска спектроскопија, инфрацрвена спектроскопија, водоничне везе, хидрогенарсенати земноалкалних метала
Ba(AsO3OH), hydrothermal synthesis, single crystal structure analysis, Raman spectroscopy, infrared spectroscopy, hydrogen bonds, alkaline earth hydrogen arsenates
Шира категорија рада
M20
Ужа категорија рада
М22
Је дио
Министарство за науку и технолошки развој Републике Србије (пројекат бр. 142030)
Права
Затворени приступ
Лиценца
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Tamara Đorđević, Ljiljana Karanović. "A new polymorph of Ba(AsO3OH): Synthesis, crystal structure and vibrational spectra" in Journal of Solid State Chemistry, Elsevier BV (2010). https://doi.org/10.1016/j.jssc.2010.09.027

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