Published January 1984 | Version v1
Journal article Metadata-only

Neodymium citrate complexes

Creators

  • 1. IPN, 91 - Orsay (France)
  • 2. Faculte des Sciences de Rabat (Maroc)
  • 3. Universite Claude Bernard, 69 - Villeurbanne (France)

Description

The behaviour of neodymium in citrate solutions has been investigated at ionic strength 0.1 over a very large concentration range: Csub(H3Cit) <= 3.10-2 mol.l-1, 10-7 <= Csub(Nd) <= 2.10-2 mol.l-1, 1 <= pH <= 13, both by solvent extraction and potentiometric technics. The nature and formation constants of the different neodymium citrates complexes has been established. A polymeric hydroxyde complex has been seen for the first time in a basic medium: Nd3(OH)4(Cit)47-. Its formula has been established by Raman spectroscopy. Some structural information has been obtained, for NdCit23- by Raman and visible spectroscopy

Abstract (French)

Le comportement du neodyme dans des milieux citriques de force ionique 0,1 a ete examine en utilisant l'extraction par solvant et la potentiometrie de facon a explorer de tres larges domaines de variation des parametres qui definissent ces milieux, concentrations en acide: Csub(H3Cit) <= 3.102 mol.l-1, en element: 10-7 <= Csub(Nd) <= 2.10-2 mol.l1- et en ions H+ : 1 <= pH <= 13. La nature, les constantes de formation et par consequent les domaines d'existence des differents complexes citriques de neodyme ont ete etablis. En particulier l'existence d'un polymere hydroxyle a ete mis en evidence en milieu basique: Nd3(OH)4(Cit)47-. Sa formule a ete etablie a la suite de mesure de spectroscopie Raman. Ce complexe et NdCit23- presentent des domaines d'existences exclusifs. Par ailleurs, des indications d'ordre structural ont ete obtenues, sur NdCit23-, par spectroscopie Raman et visible

Additional details

Additional titles

Original title (French)
Complexes citriques de neodyme

Publishing Information

Journal Title
Bull. Soc. Chim. Fr., Part 1
Journal Issue
no.1-2
Series
Bull. Soc. Chim. Fr., Part 1.
ISSN
0037-8968

INIS

Country of Publication
France
Country of Input or Organization
France
INIS RN
15063560
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
ABSORPTION SPECTROSCOPY; CHEMICAL COMPOSITION; CITRATES; MOLECULAR STRUCTURE; NEODYMIUM COMPLEXES; PH VALUE; POTENTIOMETRY; QUANTITY RATIO; RAMAN SPECTRA; SOLVENT EXTRACTION
Descriptors DEC
CARBOXYLIC ACID SALTS; COMPLEXES; RARE EARTH COMPLEXES; SEPARATION PROCESSES; SPECTRA; SPECTROSCOPY; TITRATION