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Ba3Nb2O2F12 · 2H2O: Synthesis and Crystal Structure

✍ Scribed by M.P. Crosnier-Lopez; J.L. Fourquet

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
195 KB
Volume
105
Category
Article
ISSN
0022-4596

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✦ Synopsis

Single crystals of (\mathrm{Ba}{3} \mathrm{Nb}{2} \mathrm{O}{2} \mathrm{~F}{12} \cdot 2 \mathrm{H}{2} \mathrm{O}) were grown by hydrothermal synthesis in (\mathrm{HF}) aqueous solutions. The structure is established from single crystal X-ray diffraction data: S.G. (C m c 2{1}, Z=4, a=22.633(3)) (\AA, b=7.804(1) \AA), and (c=7.748(1) \AA\left(R=0.0310, R_{w}=0.0331\right.) for 2619 independent reflections and 99 parameters). The tridimensional network is built up from (\mathrm{NbOF}_{6}) pentagonal bipyramids connected by (\mathrm{Ba}^{2+}) ions (in 9- and 11 -fold coordination). The location of anions and water molecules is discussed from bond valence calculations. 1993 Academic Press, Inc.

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## Abstract For Abstract see ChemInform Abstract in Full Text.

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