Published 2000 | Version v1
Journal article Metadata-only

Preparation and study of structure of complex orthophosphates of zirconium and alkali elements. 4. Formation and thermodynamic characteristics of solid solutions in high temperature aqua-salt systems

Creators

  • 1. RAN, Inst. Ehksperimental'noj Mineralogii, Moscow (Russian Federation)
  • 2. RAN, Inst. Litosfery, Moscow (Russian Federation)
  • 3. Nizhegorodskij Gosudarstvennyj Univ., Nizhnij Novgorod (Russian Federation)

Description

Behaviour of zirconium orthophosphate as matrix materials for vitrification of radioactive wastes are studied at high temperatures in aqueous solutions. Cation exchange reactions in NaZr2(PO4)3-KZr2(PO4)3-NaCl-KCl-H2O system are investigated at 450-650 Deg C and 1-2 kbar. Excessive functions of mixing of crystals are calculated on the basis of data on their equilibria with water fluid. Parameters of elementary cells of solid Na1-xKxZr2(PO4)3 solutions with 0≤x≤1 are refined

Abstract (Russian)

Изучено поведение ортофосфатов циркония как матрицы для отверждения радиоактивных отходов при высоких темпетатурах в водных растворах. Исследованы катионообменные реакции в системе NaZr2(PO4)3-KZr2(PO4)3-NaCl-KCl-H2O при 450-650 град C и 1-2 кбар. Рассчитаны избыточные функции смешения кристаллов на основе данных по их равновесиям с водным флюидом. Уточнены параметры элементарных ячеек твердых растворов Na1-xKxZr2(PO4)3 с 0≤x≤1

Additional details

Additional titles

Original title (Russian)
Получение и изучение строения сложных ортофосфатов циркония и щелочных элементов. 4. Образование и термодинамические характеристики твердых растворов в высокотемпературных водно-солевых системах

Publishing Information

Journal Title
Radiokhimiya
Journal Volume
42
Journal Issue
4
Journal Page Range
p. 325-330
ISSN
0033-8311
CODEN
RADKAU

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
32017818
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
ALKALI METAL COMPOUNDS; CHEMICAL COMPOSITION; CHEMICAL PREPARATION; LATTICE PARAMETERS; MATRIX MATERIALS; PHOSPHATES; SOLID SOLUTIONS; SOLUBILITY; TEMPERATURE RANGE 0400-1000 K; THERMODYNAMIC PROPERTIES; VITRIFICATION; ZIRCONIUM COMPLEXES
Descriptors DEC
COMPLEXES; DISPERSIONS; HOMOGENEOUS MIXTURES; MATERIALS; MIXTURES; OXYGEN COMPOUNDS; PHOSPHORUS COMPOUNDS; PHYSICAL PROPERTIES; SOLUTIONS; SYNTHESIS; TEMPERATURE RANGE; TRANSITION ELEMENT COMPLEXES

Optional Information

Notes
20 refs., 6 figs., 4 tabs.