Published March 1987 | Version v1
Journal article Metadata-only

Polymorphism of oxytungstates TR2WO6. Mechanism of structural transformations of Er2WO6

Creators

  • 1. Vsesoyuznyj Nauchno-Issledovatel'skij Inst. Khimicheskikh Reaktivov i Osobo Chistykh Veshchestv, Moscow (USSR)

Description

Structural types of rare earth and Y oxytungstates of TR2WO6 structure are systematized. X-ray diffraction study of Er2WO6 two modifications with the elementary cell parameters: a=5.193, b=8.991, c=9.863 A (sp.gr. P212121, z=4, R=6.1 and Rw=6.6%) and a=7.576, b=5.137, c=11.316 A, β=104.48 deg (sp.gr. P2/c, z=4, R=5.2 and Rw=6.6%). Structures of these and earlier described (sp.gr. Pbca, z=8) erbium oxytungstate modifications are compared. The most probable mechanism of structural transformations during phase transfer of three Er2WO6 modifications is suggested

Additional details

Additional titles

Original title (Russian)
Полиморфизм оксивольфраматов TR

Publishing Information

Journal Title
Kristallografiya
Journal Volume
32
Journal Issue
2
Series
Kristallografiya.
Journal Page Range
363-370
ISSN
0023-4761
CODEN
KRISA

INIS

Country of Publication
Russian Federation
Country of Input or Organization
USSR
INIS RN
19021517
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
BOND LENGTHS; CRYSTAL LATTICES; CRYSTAL-PHASE TRANSFORMATIONS; ERBIUM TUNGSTATES; INTERATOMIC DISTANCES; LATTICE PARAMETERS; SPACE GROUPS; YTTRIUM TUNGSTATES
Descriptors DEC
CRYSTAL STRUCTURE; DISTANCE; ERBIUM COMPOUNDS; OXYGEN COMPOUNDS; PHASE TRANSFORMATIONS; RARE EARTH COMPOUNDS; SYMMETRY GROUPS; TRANSITION ELEMENT COMPOUNDS; TUNGSTATES; TUNGSTEN COMPOUNDS; YTTRIUM COMPOUNDS