An investigation of the europium valence in EuCu{sub 1.75}P{sub 2} by Eu Moessbauer and Eu L{sub III}-edge X-ray absorption spectroscopy

Journal Article · Sat May 01 00:00:00 EDT 1999 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1006/jssc.1997.7622· OSTI ID:351510

Bornick, R M; Stacy, A M ^[1]; Taylor, R D; Kwei, G H ^[2]

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1. University of California, Berkeley, CA (United States). Dept. of Chemistry
2. Los Alamos National Lab., NM (United States). Condensed Matter and Thermal Physics Group

The europium valence for EuCu{sub 1.75}P{sub 2} is examined by Eu Moessbauer spectroscopy and Eu L{sub III}-edge X-ray absorption spectroscopy. On the basis of previous measurements of related phases with the ThCr{sub 2}Si{sub 2} structure-type, the europium valence in EuCu{sub 1.75}P{sub 2} is expected to be intermediate valent or trivalent. In contrast, divalent europium is observed. This result is explained on the basis of a band argument in which the conduction band is filled, and thus, there is an extra electron in the Eu 4f{sup 7} state.

• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 351510
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 2 Vol. 144; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION SPECTROSCOPY
COPPER PHOSPHIDES
CRYSTAL STRUCTURE
EUROPIUM PHOSPHIDES
EXPERIMENTAL DATA
LATTICE PARAMETERS
VALENCE
X-RAY DIFFRACTION