The Crystal Chemistry of the Europium Arsenides

  • Forrest L. Carter
  • L. D. Calvert

Abstract

Recently seven well-defined crystal structures of the europium arsenides, Eu5As3, Eu4As3, Eu5As4, Eu2As2, Eu3As4, Eu3As3, and EuAs3 (1–6), and two closely related oxides, Eu4As20 and Eu3As3TaO (7,8) have been reported from the same laboratory. In order to better understand the crystal chemistry of these materials and the nature of the elements, Eu and As, the crystal structure results are studied here via the calculation of polyhedral atomic volumes (PAVs), coordination numbers (CN), partial coordination number coefficients, f, Pauling metallic valences, and harmonic analysis (9,10). These approaches have been useful in the past in understanding and quantifying the crystal chemistry of rare earth intermetallics, halides and hydrides (10–12).

Keywords

Nickel Europium Bromide Arsenic Hydride 

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Copyright information

© Plenum Press, New York 1982

Authors and Affiliations

  • Forrest L. Carter
    • 1
  • L. D. Calvert
    • 2
  1. 1.Chemistry DivisionNaval Research LaboratoryUSA
  2. 2.Chemistry DivisionNational Research Council of CanadaOttawaCanada

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