Moessbauer spectra of Np(V)--Cr(III) and Np(V)--Rh(III) complexes

Conference · Sat Jan 01 04:00:00 EST 1977

OSTI ID:7087535

Karraker, D. G.; Stone, J. A.

The Moessbauer spectra of complexes between Np(V) and Cr(III) or Rh(III) ions absorbed on cation exchange resin were measured at 4.2/sup 0/K with a constant acceleration Moessbauer spectrometer. The spectrum of the Np(V)-Cr(III) complex showed a strong magnetic splitting with Moessbauer parameters of g/sub 0/..mu../sub N/H/sub eff/ 9.91 cm/sec, /sup 1///sub 4/ eqQ = -2.9 cm/sec, and delta = 1.69 cm/sec. The spectrum of the Np(V)-Rh(III) complex was dominated by quadrupole splitting with a minor fraction showing magnetic hyperfine structure. The results of these measurements are consistent with the suggested structure of the complexes--substituting NpO/sub 2//sup +/ in the transition metal ion coordination sphere--and the magnetic properties of paramagnetic Cr(III) ion (3d/sup 3/, high spin) and diamagnetic Rh(III) ion (4d/sup 6/, spin = 0).

• Research Organization: Du Pont de Nemours (E.I.) and Co., Aiken, S.C. (USA). Savannah River Lab.
• DOE Contract Number: EY-76-C-09-0001
• OSTI ID: 7087535
• Report Number(s): DP-MS-77-21; CONF-770814-2
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400702* -- Radiochemistry & Nuclear Chemistry-- Properties of Radioactive Materials
ACTINIDE COMPLEXES
CHROMIUM COMPLEXES
COMPLEXES
CRYSTAL STRUCTURE
MOESSBAUER EFFECT
NEPTUNIUM COMPLEXES
RHODIUM COMPLEXES
TRANSITION ELEMENT COMPLEXES
TRANSURANIUM COMPLEXES
ULTRALOW TEMPERATURE