High resolution electron microscopy studies of Ba4Nb14O23

Zeitschrift fur Anorganische und Allgemeine Chemie - Tập 619 Số 1 - Trang 133-137 - 1993
Gunnar Svensson1, Jürgen Köhler2, Max T. Otten3, Arndt Simon2
1Stockholms Universitet Arrhenius Laboratoriet S‐106 9 I Stockholm, Sweden
2Stuttgart, Max Planck‐Institut für Festkörperforschung
3Eindhoven/The Netherlands, Philips Electron Optics

Tóm tắt

AbstractThe new compound, Ba4Nb14O23, has been prepared by heating mixtures of Ba5Nb4O15, Nb2O5 and Nb at 1 450°C under Ar. Ba4Nb14O23 has been studied by means of high resolution electron microscopy and X‐ray powder diffraction techniques. It has a C‐centered orthorhombic unit cell with a=20.782(4), b=12.448(3), c=4.148(1) Å and Z=2. The structure of Ba4Nb14O23 can be considered as being an intergrowth between BaNbO3 and NbO. Characteristic building units are triple chains of corner sharing Nb6 octahedra which are connected via columns of the perovskite type structure to a three dimensional network.

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Tài liệu tham khảo

10.1002/ange.19921041106

10.1002/zaac.19412480101

10.1002/ange.19640762002

10.1016/0025-5408(88)90018-9

10.1016/0925-8388(91)90017-P

Zubkov V. G., 1990, Dokl. Akad. Nauk. SSSR (Kristallografiya), 312, 615

10.1002/ange.19921040215

10.1002/anie.199202121

Zubkov V. G., 1990, Sverkhprovodimost', Fiz. Khim. Tekh., 3, 2121

V. G.Zubkov to be published.

10.1051/mmm:0199000105-6034300

10.6028/jres.065A.036

10.1107/S0021889875009508

10.1088/0022-3735/13/12/015

10.1021/ac00230a032

M.O'Keefe in:J. J.Hren F. A.Lenz E.Munro P. B.Sewer Electron Optical System for Microscopy Microanalysis and Microlithography (Proc. 3rd Pfefferkorn Conf.) SEM Inc. AMF O'Hare IL 60 666 USA1984.

10.1107/S0021889877012898

10.1021/cm00015a031

10.1016/0022-4596(76)90173-0

10.1016/0022-4596(81)90015-3

10.3891/acta.chem.scand.46-0244

G.Svensson J.Grins in preparation.

10.1107/S002188986800508X

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Zeitschrift fur Anorganische und Allgemeine Chemie

Tập 619 Số 1

133-137

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