ON THE COMPLEX CHEMISTRY OF THE TERVALENT RARE EARTH IONS. II. THE ACETATE SYSTEMS OF PRASEODYMIUM, SAMARIUM, DYSPROSIUM, HOLMIUM, ERBIUM, AND YTTERBIUM
Six rare earth acetate systems were examined potentiometrically and one extinctiometrically. The complexity and stability constants are listed. All measurements were performed in perchlorate medium of ionic strength 2 M at 20 C. The extinctiometnic investigation of the Er/sup 3+/-Ac/sup -/ system shows that the rormation of the acetate complexes is accompanied by the appearance of new peaks close to the original ansorption bands at about 380 m mu and 525 M mu . The new peaks, one at every band, have a somewhat shorter wavelength than the original peaks. The agreement between the potentiometrically and the extinctiometrically obtained complexity constants is good. The stability constant of the first comp1ex, bt, increases with the atomic number from La to Sm. Then it decreases for Gd and Dy and remains approximately constant for Dy, Ho, Er, and Yb. To begin with, b/sub 2/ and b/sub 3/ also increase with the atomic number of the rare earth. For the heaviest rare earths, however, b/sub 2/ and b/ sub 3/ decrease slightly. The heavier rare earths (Gd-Yb) seem to form polynuclear complexes which, however, are rather weak. (auth)
- Research Organization:
- Univ. of Lund
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-13-010884
- OSTI ID:
- 4254899
- Journal Information:
- Acta Chemica Scandinavica (Denmark) Divided into Acta Chem. Scand., Ser. A and Ser. B, Journal Name: Acta Chemica Scandinavica (Denmark) Divided into Acta Chem. Scand., Ser. A and Ser. B Vol. Vol: 12; ISSN ACSAA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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SPECTROPHOTOMETRIC DETERMINATION OF RARE EARTHS IN SOLUTIONS OF ETHYLENEDIAMINETETRA-ACETIC COMPLEXES
Related Subjects
ACETATES
ANIONS
ATOMS
BINDING ENERGY
CATIONS
CHEMISTRY
DYSPROSIUM COMPLEXES
DYSPROSIUM COMPOUNDS
ELECTRIC CHARGES
ELECTRIC POTENTIAL
ELECTROLYTES
ERBIUM COMPLEXES
ERBIUM COMPOUNDS
FREQUENCY
HOLMIUM COMPLEXES
HOLMIUM COMPOUNDS
IONIC STRENGTH
MEASURED VALUES
NUMERICALS
PERCHLORIC ACID
PRASEODYMIUM COMPLEXES
PRASEODYMIUM COMPOUNDS
QUALITATIVE ANALYSIS
RARE EARTHS
SAMARIUM COMPLEXES
SAMARIUM COMPOUNDS
SPECTRA
STABILITY
YTTERBIUM COMPLEXES
YTTERBIUM COMPOUNDS