Published November 2002 | Version v1
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237Np Moessbauer spectra for neptunyl(VI) oxalate NpO2C2O4·3H2O and amorphous neptunyl(VI) hydroxide NpO2(OH)2·xH2O

Creators

  • 1. Toho University, Faculty of Science, Funabashi, Chiba (Japan)
  • 2. Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Tokai Research Establishment

Description

237Np Moessbauer spectra for Np(VI)O2C2O4·3H2O being seven-coordinated and amorphous Np(VI)O2(OH)2·xH2O prepared by NaBrO3 oxidation are reported. The spectra for the oxalate at 10, 30 and 50K show broad paramagnetic relaxation patterns. The spectrum of the hydroxide at 10K shows a pure electric quadrupole splitting pattern. The structural information of the oxalate and the hydroxide has been obtained from these results. Linear correlation between the 237Np Moessbauer isomer shift(δ) and the mean Np-O bond distance is consistent with seven-oxo-coordinated Np(VI) compounds. (author)

Availability note (English)

Available from the Internet at URL https://doi.org/10.1080/00223131.2002.10875499
Part of:
Proceedings of actinide 2001 international conference

Additional details

Identifiers

DOI
10.1080/00223131.2002.10875499;

Publishing Information

Publisher
Atomic Energy Society of Japan
Imprint Place
Tokyo (Japan)
Imprint Title
Proceedings of actinide 2001 international conference
Imprint Pagination
986 p.
Journal Page Range
p. 429-432

Conference

Title
Actinide 2001 international conference
Dates
4-9 Nov 2001
Place
Hayama, Kanagawa (Japan)

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
51054799
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Resource subtype / Literary indicator
Conference
Descriptors DEI
AMORPHOUS STATE; BOND LENGTHS; COORDINATION NUMBER; CRYSTAL STRUCTURE; HYDROXIDES; ISOMER SHIFT; MOESSBAUER EFFECT; NEPTUNIUM 237; NEPTUNYL COMPOUNDS; OXALATES; SPIN-LATTICE RELAXATION
Descriptors DEC
ACTINIDE COMPOUNDS; ACTINIDE NUCLEI; ALPHA DECAY RADIOISOTOPES; CARBOXYLIC ACID SALTS; DIMENSIONS; HEAVY NUCLEI; HYDROGEN COMPOUNDS; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; LENGTH; NANOSECONDS LIVING RADIOISOTOPES; NEPTUNIUM COMPOUNDS; NEPTUNIUM ISOTOPES; NUCLEI; ODD-EVEN NUCLEI; OXYGEN COMPOUNDS; RADIOISOTOPES; RELAXATION; SPONTANEOUS FISSION RADIOISOTOPES; TRANSURANIUM COMPOUNDS; YEARS LIVING RADIOISOTOPES

Optional Information

Notes
12 refs., 4 figs., 1 tab.; This record replaces 34040091