Published 2001 | Version v1
Journal article Metadata-only

Solubility of thorium under oxygen-free conditions

Creators

  • 1. Lab. Radiokhimii Khimicheskogo Fakul'teta Univ. Khel'sinki, Khel'sinki (Finland)
  • 2. Tsentr Khimicheskoj Tekhnologii VTT, Ehspoo (Finland)
  • 3. Lab. Neorganicheskoj Khimii Khimicheskogo Fakul'teta Univ. Khel'sinki, Khel'sinki (Finland)

Description

Thorium solubility in 0.1 mol/l NaCl in oxygen- and carbonate-free conditions was studied. Equilibrium was established both in terms of unsaturated and oversaturated solutions. Crystallization of amorphous and microcrystal thorium-containing solid phases was controlled roentgenographically. Thorium concentration in solutions in the range of 10-11-10-8 mol/l was determined by means of mass spectrometry. Study by the methods of electron microscopy of the precipitate and solution after ultrafiltration suggests that in the system studied thorium does not form colloids. Experimentally obtained value of thorium solubility in carbonate-free medium agrees well with the calculated value (EQ3/6 code); i.e. approximately 2x10-3 mol/l

Abstract (Russian)

Изучена растворимость тория в 0.1 моль/л NaCl в бескислородных бескарбонатных условиях. Равновесие устанавливалось со стороны как ненасыщенных, так и пересыщенных растворов. Кристаллизацию образующихся аморфных и микрокристаллических торийсодержащих твердых фаз контролировали рентгенографически. Концентрацию тория в растворах в интервале 10-1-1-10-8 моль/л определяли масс-спектрометрически. Исследование методом электронной микроскопии осадка и раствора после ультрафильтрации показало, что в исследуемой системе торий не образует коллоидов. Экспериметальная величина растворимости тория в бескарбонатной среде хорошо согласуется с расчетным значением (программа EQ3/6): около 2х10-9 моль/л

Additional details

Additional titles

Original title (Russian)
Растворимост' тория в бескислородных условиях

Publishing Information

Journal Title
Radiokhimiya
Journal Volume
43
Journal Issue
5
Journal Page Range
p. 410-414
ISSN
0033-8311
CODEN
RADKAU

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
34046088
Subject category
S38: RADIATION CHEMISTRY, RADIOCHEMISTRY AND NUCLEAR CHEMISTRY;
Descriptors DEI
AMORPHOUS STATE; AQUEOUS SOLUTIONS; CHEMICAL STATE; CRYSTALS; EQUILIBRIUM; INERT ATMOSPHERE; PH VALUE; PHASE STUDIES; SODIUM CHLORIDES; SOLUBILITY; THORIUM COMPOUNDS; X-RAY DIFFRACTION
Descriptors DEC
ACTINIDE COMPOUNDS; ALKALI METAL COMPOUNDS; ATMOSPHERES; CHLORIDES; CHLORINE COMPOUNDS; COHERENT SCATTERING; CONTROLLED ATMOSPHERES; DIFFRACTION; DISPERSIONS; HALIDES; HALOGEN COMPOUNDS; HOMOGENEOUS MIXTURES; MIXTURES; SCATTERING; SODIUM COMPOUNDS; SOLUTIONS

Optional Information

Notes
19 refs.; 3 tabs.; 4 figs.