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High-resolution microscopy of nonstoichiometric Nb22O54 crystals: point defects and structural defects (1974)

Iijima, S. ; Kimura, S. ; Goto, M.

[S.l.] : International Union of Crystallography (IUCr)

Acta crystallographica 30 (1974), S. 251-257

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ISSN: 1600-5724

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

Topics: Chemistry and Pharmacology , Geosciences , Physics

Notes: With the use of high-resolution electron microscopy, defects have been observed in crystals of Nb22O54: two types of point defects and extended Wadsley-type defects having a structure corresponding to Nb12O29. For one type of point defect a model is proposed which contains two displaced metal atoms and two interstitial oxygen atoms within a 'block'. For the other, one metal atom and three oxygen atoms are considered to be missing from a tetrahedral site. Contributions made by the three types of defects to the non-stoichiometry of the crystals are discussed.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1107/S0567739474000519

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