Low-temperature structures of CuO and AgO and their relationships to those of MgO and PdO

N. E. Brese, M. O'Keeffe, B. L. Ramakrishna, R. B. Von Dreele

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75 Scopus citations


The CuO structure has been refined from time-of-flight neutron diffraction data collected at 11 K. Crystal data: C2 c, a = 4.6833(2) Å, b = 3.4208(1) Å, c = 5.1294(2) Å, β = 99.567(1)°, V = 81.031(7)Å3. The CuO distances are 1.951(1) and 1.961(1) Å (each 2 ×) with corresponding OCuO angles of 84.315(7)° and 95.685(7)°. Data for a mixture of AgO and Ag2SO4 were collected at 9 K. Crystal data for AgO: P21 c, a = 5.8517(3) Å, b = 3.4674(2) Å, c = 5.4838(3) Å, β = 107.663(3)°, V = 106.02(1)Å3. The formula for AgO is better written as Ag(I)Ag(III)O2. The Ag(III) atoms are 4-coordinated: AgO = 2.008(3) (2x) and 2.036(3) (2x), and the Ag(I) atoms are 2-coordinated by O: AgO = 2.147(3) (2x). A comparison of the CuO, AgO, PdO, and MgO structures is presented.

Original languageEnglish (US)
Pages (from-to)184-190
Number of pages7
JournalJournal of Solid State Chemistry
Issue number1
StatePublished - Nov 1990

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry


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