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Neutron diffraction investigation of ordered oxygen vacancies in the defect pyrochlores, Pb2Ru2O6.5 and PbT1Nb2O6.5

✍ Scribed by R.A. Beyerlein; H.S. Horowitz; J.M. Longo; M.E. Leonowicz; J.D. Jorgensen; F.J. Rotella

Publisher
Elsevier Science
Year
1984
Tongue
English
Weight
870 KB
Volume
51
Category
Article
ISSN
0022-4596

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The crystal structure of the columbite-type phase MgNb 2 O 6 has been refined from powder neutron diffraction data. The compound is orthorhombic, space group Pbcn (60), Z ‫؍‬ 4, with unit cell parameters a ‫؍‬ 14.1875(1), b ‫؍‬ 5.7001(1), c ‫؍‬ 5.0331(1) A > . The structure contains chains of NbO 6