SCANDIUM NITRATE-NITRIC ACID-WATER-TRIBUTYL PHOSPHATE SYSTEM .3. IR-SPECTRA OF SCANDIUM EXTRACTS FROM CONCENTRATED NITRIC-ACID SOLUTIONS

Authors
NIKITINA GP EGOROVA VP LISTOPADOV AA SHPUNT LB
Citation
Gp. Nikitina et al., SCANDIUM NITRATE-NITRIC ACID-WATER-TRIBUTYL PHOSPHATE SYSTEM .3. IR-SPECTRA OF SCANDIUM EXTRACTS FROM CONCENTRATED NITRIC-ACID SOLUTIONS, Radiochemistry, 37(2), 1995, pp. 124-127
Citations number
8
Categorie Soggetti
Chemistry Analytical","Chemistry Inorganic & Nuclear
Journal title
Radiochemistry → ACNP
ISSN journal
10663622
Volume
37
Issue
2
Year of publication
1995
Pages
124 - 127
Database
ISI
SICI code
1066-3622(1995)37:2<124:SNAPS.>2.0.ZU;2-P
Abstract
Equilibrium organic phases in extraction systems consisting of tributy l phosphate (TBP) (neat or 1 M in CCl4) and 8-12 M nitric acid contain ing scandium or scandium-free have been studied by IR spectroscopy. Ex tracted complex contains 3, 4, or 5 nitric acid molecules per Sc atom in the case of extraction from 8.3, 10.9, and 12.2 M HNO3, respectivel y, and corresponds to the formula Sc(NO3)(3) . mHNO(3) . 3TBP, Nitric acid molecules are incorporated into extracted complex via H-bond betw een oxygen atom of coordinated nitrate ion and acid proton.