Published 2002 | Version v1
Journal article Metadata-only

Synthesis and x-ray diffraction study of the NaZr2(PO4)3 and CePO4-type structure orthophosphates of complex cationic composition

Creators

  • 1. Gosudarstvennyj Nauchnyj Tsentr RF Nauchno-Issledovatel'skij Inst. Atomnykh Reaktorov, Dimitrovgrad (Russian Federation)
  • 2. Nizhegorodskij Gosudarstvennyj Univ. im. N.I. Lobachevskogo, Nizhnij Novgorod (Russian Federation)

Description

Ceramic phosphate compositions, containing cations Ca2+, Cd2+, Gd3+, Ti4+, Hf4+, Ce4+, U4+, Pu4+, were synthesized, their X-ray diffraction study was conducted to consider the properties of potential matrix materials for immobilization of plutonium-containing nuclear waste. It was ascertained that phosphate containing cations Ti4+ and Hf4+ form two-phase products. One of the phases was referred to NaZr2(PO4)3, structural type, the other - to monazite (CePO4) type. Influence of cation composition on phase formation, as well as of the size of cations on crystal lattice parameters of the phases formed, was determined

Abstract (Russian)

С целью изучения свойств потенциальных матричных материалов для иммобилизации плутонийсодержащих ядерных отходов проведен синтез и выполнено рентгенографическое исследование керамических фосфатных композиций, содержащих катионы Ca2+, Cd2+, Gd3+, Ti4+, Hf4+, Ce4+, U4+, Pu4+. Установлено, что фосфаты, содержащие катионы Ti4+ и Hf4+, образуют двухфазные продукты. Одна из фаз отнесена к структурному типу NaZr2(PO4)3, другая - к типу монацита (CePO4). Определено влияние катионного состава на фазообразование, а также влияние размеров катионов на параметры кристаллических решеток образующихся фаз

Additional details

Additional titles

Original title (Russian)
Синтез и рентгенографическое исследование ортофосфатов сложного катионного состава со структурами типа NaZr

Publishing Information

Journal Title
Radiokhimiya
Journal Volume
44
Journal Issue
4
Journal Page Range
p. 293-298
ISSN
0033-8311
CODEN
RADKAU

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
35001467
Subject category
S36: MATERIALS SCIENCE; S38: RADIATION CHEMISTRY, RADIOCHEMISTRY AND NUCLEAR CHEMISTRY;
Descriptors DEI
ALPHA-BEARING WASTES; CADMIUM PHOSPHATES; CALCIUM PHOSPHATES; CERAMICS; CERIUM PHOSPHATES; CHEMICAL COMPOSITION; CHEMICAL PREPARATION; CRYSTAL LATTICES; GADOLINIUM PHOSPHATES; HAFNIUM PHOSPHATES; LATTICE PARAMETERS; MATRIX MATERIALS; PHASE STUDIES; PLUTONIUM PHOSPHATES; URANIUM PHOSPHATES
Descriptors DEC
ACTINIDE COMPOUNDS; ALKALINE EARTH METAL COMPOUNDS; CADMIUM COMPOUNDS; CALCIUM COMPOUNDS; CERIUM COMPOUNDS; CRYSTAL STRUCTURE; GADOLINIUM COMPOUNDS; HAFNIUM COMPOUNDS; MATERIALS; OXYGEN COMPOUNDS; PHOSPHATES; PHOSPHORUS COMPOUNDS; PLUTONIUM COMPOUNDS; RADIOACTIVE MATERIALS; RADIOACTIVE WASTES; RARE EARTH COMPOUNDS; REFRACTORY METAL COMPOUNDS; SYNTHESIS; TRANSITION ELEMENT COMPOUNDS; TRANSURANIUM COMPOUNDS; URANIUM COMPOUNDS; WASTES

Optional Information

Notes
33 refs., 1 fig., 6 tabs.