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Title: Crystal structure of nonstoichiometric copper-substituted La(Ni{sub 1{minus}z}Cu{sub z}){sub x} compounds studied by neutron and synchrotron anomalous powder diffraction

Abstract

The structural properties of the potential battery electrode materials LaNi{sub 4}Cu, LaNi{sub 4.4}Cu, LaNi{sub 5}Cu, and LaNi{sub 4.5}Cu{sub 1.5} have been investigated by neutron and anomalous synchrotron powder diffraction. The nonstoichiometry of such AB{sub x} (5 {le} x {le} 6) compounds has been described in a structure derived from the hexagonal CaCu{sub 5}-type structure by replacement of the A atoms by dumbbells of B atoms. In these copper-substituted compounds, Cu can occupy any of the four available nickel sites. From a joint refinement procedure using both neutron and synchrotron data, the copper-to-nickel ratio at each B site has been determined. This shows that substitution is not random and that copper occupies some crystallographic sites preferentially. The results are discussed and compared to other substituted AB{sub 5} systems.

Authors:
; ;  [1];  [2]
  1. CNRS, Thiais (France). Lab. de Chimie Metallurgique des Terres Rares
  2. Philips Research Labs., Eindhoven (Netherlands)
Publication Date:
OSTI Identifier:
696666
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: 146; Journal Issue: 2; Other Information: PBD: Sep 1999
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 25 ENERGY STORAGE; CRYSTAL STRUCTURE; LANTHANUM ALLOYS; NICKEL ALLOYS; COPPER ALLOYS; ELECTRIC BATTERIES; STOICHIOMETRY; NEUTRON DIFFRACTION; X-RAY DIFFRACTION; EXPERIMENTAL DATA

Citation Formats

Latroche, M, Joubert, J M, Percheron-Guegan, A, and Notten, P H.L. Crystal structure of nonstoichiometric copper-substituted La(Ni{sub 1{minus}z}Cu{sub z}){sub x} compounds studied by neutron and synchrotron anomalous powder diffraction. United States: N. p., 1999. Web. doi:10.1006/jssc.1999.8348.
Latroche, M, Joubert, J M, Percheron-Guegan, A, & Notten, P H.L. Crystal structure of nonstoichiometric copper-substituted La(Ni{sub 1{minus}z}Cu{sub z}){sub x} compounds studied by neutron and synchrotron anomalous powder diffraction. United States. https://doi.org/10.1006/jssc.1999.8348
Latroche, M, Joubert, J M, Percheron-Guegan, A, and Notten, P H.L. 1999. "Crystal structure of nonstoichiometric copper-substituted La(Ni{sub 1{minus}z}Cu{sub z}){sub x} compounds studied by neutron and synchrotron anomalous powder diffraction". United States. https://doi.org/10.1006/jssc.1999.8348.
@article{osti_696666,
title = {Crystal structure of nonstoichiometric copper-substituted La(Ni{sub 1{minus}z}Cu{sub z}){sub x} compounds studied by neutron and synchrotron anomalous powder diffraction},
author = {Latroche, M and Joubert, J M and Percheron-Guegan, A and Notten, P H.L.},
abstractNote = {The structural properties of the potential battery electrode materials LaNi{sub 4}Cu, LaNi{sub 4.4}Cu, LaNi{sub 5}Cu, and LaNi{sub 4.5}Cu{sub 1.5} have been investigated by neutron and anomalous synchrotron powder diffraction. The nonstoichiometry of such AB{sub x} (5 {le} x {le} 6) compounds has been described in a structure derived from the hexagonal CaCu{sub 5}-type structure by replacement of the A atoms by dumbbells of B atoms. In these copper-substituted compounds, Cu can occupy any of the four available nickel sites. From a joint refinement procedure using both neutron and synchrotron data, the copper-to-nickel ratio at each B site has been determined. This shows that substitution is not random and that copper occupies some crystallographic sites preferentially. The results are discussed and compared to other substituted AB{sub 5} systems.},
doi = {10.1006/jssc.1999.8348},
url = {https://www.osti.gov/biblio/696666}, journal = {Journal of Solid State Chemistry},
number = 2,
volume = 146,
place = {United States},
year = {Wed Sep 01 00:00:00 EDT 1999},
month = {Wed Sep 01 00:00:00 EDT 1999}
}