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Title: X-ray Absorption Spectroscopy of the Rare Earth orthophosphates

X-ray Absorption Spectroscopy (XAS) of the Rare Earth (RE) 3d levels yields sharp peaks near the edges as a result of strong, quasi-atomic 3d{sup 10}4f{sup n} {yields} 3d-{sup 9}4f{sup n+1} transitions and these transitions exhibit a wealth of spectroscopic features. The XAS measurements of single crystal REPO{sub 4} (RE = La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Er) at the 3d edge were performed in the total yield mode at beam line 8-2 at the Stanford Synchrotron Radiation Laboratory (SSRL). The XAS spectra of the RE ions in the orthophosphate matrix generally resemble the XAS of the corresponding RE metal. This is not unexpected and emphasizes the major contribution of the trivalent state to the electronic transitions at the RE 3d edges. These spectra unequivocally identify the transitions originating from well-characterized RE cores and correlate well with previous theoretical investigations.
Authors:
 [1] ;  [2] ; ;  [3]
  1. Lawrence Berkeley Lab., CA (United States)
  2. Lawrence Livermore National Lab., CA (United States)
  3. Oak Ridge National Lab., TN (United States)
Publication Date:
OSTI Identifier:
10186804
Report Number(s):
UCRL-JC--114161; CONF-930405--47
ON: DE94001043; TRN: 93:025464
DOE Contract Number:
W-7405-ENG-48; AC03-76SF00098; AC05-84OR21400
Resource Type:
Conference
Resource Relation:
Conference: Spring meeting of the Materials Research Society,San Francisco, CA (United States),12-16 Apr 1993; Other Information: PBD: Jun 1993
Research Org:
Lawrence Livermore National Lab., CA (United States); Lawrence Berkeley Lab., CA (United States); Oak Ridge National Lab., TN (United States)
Sponsoring Org:
USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; RARE EARTH COMPOUNDS; X-RAY SPECTRA; PHOSPHATES; ABSORPTION SPECTRA; ENERGY-LEVEL TRANSITIONS 400201; 360606; CHEMICAL AND PHYSICOCHEMICAL PROPERTIES; PHYSICAL PROPERTIES