Published July 1990 | Version v1
Journal article Metadata-only

On the double calcium and cerium orthophosphates with whitlockite structure

Creators

  • 1. Moskovskij Gosudarstvennyj Univ., Moscow (USSR)
  • 2. Univ. Bordo 1 (France)

Description

A possibility of reduction process in a three-dimensional frame of whitlockite-like structure of double orthophosphates of calcium and cerium is experimentally studied taking Ce(4)/Ce(3) pair as an example. Using the X-ray phase analysis, IR and PMR spectroscopy methods it is shown that even at 693 K in the three-dimensional frame of Ca3-xCe0.5x4+ (PO4)2 (0≤x<2/7) reduction of Ce(4) to Ce(3) takes place under effect of hydrogen without the structure destruction. As a result of the reduction isolated proton introduction into the orthophosphate lattice occurs

Additional details

Additional titles

Original title (Russian)
О двойных ортофосфатах кальция и церия со структурой витлокита

Publishing Information

Journal Title
Vestnik Moskovskogo Universiteta, Seriya 2. Khimiya
Journal Volume
31
Journal Issue
4
Series
Vestn. Mosk. Univ., Ser. 2. Khim.
Journal Page Range
406-410
ISSN
0579-9384
CODEN
VMUKA

INIS

Country of Publication
Russian Federation
Country of Input or Organization
USSR
INIS RN
22033466
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
ABSORPTION SPECTRA; CALCIUM PHOSPHATES; CERIUM PHOSPHATES; CHEMICAL COMPOSITION; CRYSTAL STRUCTURE; HIGH TEMPERATURE; HYDROGEN; INFRARED SPECTRA; LATTICE PARAMETERS; NMR SPECTRA; PROTONS; REDUCTION
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; BARYONS; CALCIUM COMPOUNDS; CATIONS; CERIUM COMPOUNDS; CHARGED PARTICLES; CHEMICAL REACTIONS; ELEMENTARY PARTICLES; ELEMENTS; FERMIONS; HADRONS; HYDROGEN IONS; HYDROGEN IONS 1 PLUS; IONS; NONMETALS; NUCLEONS; OXYGEN COMPOUNDS; PHOSPHATES; PHOSPHORUS COMPOUNDS; RARE EARTH COMPOUNDS; SPECTRA