Crystallization of rare earth germanates in RbOH and CsOH solutions at 280 deg C
Description
Studied has been interaction of germanium dioxide with neodymium and ytterbium oxides in RbOH and CsOH solutions under hydrothermal conditions at 280 deg C. In the Rb2O-Nd2O3-GeO2-H2O system crystallization of four compounds takes place, to three of which, having different infrared spectra but the same chemical formula Nd2O3x2GeO2 and to neodymium hydroxide Nd(OH)3 separate crystallization fields correspond on phase diagram. In the Rb2O-Yb2O3-GeO2-H2O system the only phase with the composition Yb2Ge2O7 is formed. This compound is identified as ytterbium diorthogermanate, which is crystallized in tetragonal crystal system, parameters of the elementary cell are: a=6.72, c=12.2 A. It has been shown that phase formation does not practically depend upon alkali cation, introduced into the system
Additional details
Additional titles
- Original title (Russian)
- Кристаллизация редкоземельных германатов в растворах RbOH и CsOH при 280 дег C
Publishing Information
- Imprint Title
- Physicochemical investigation of compounds and alloys of rare earth elements
- Journal Page Range
- p. 77-83.
INIS
- Country of Publication
- USSR
- Country of Input or Organization
- USSR
- INIS RN
- 11499005
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Resource subtype / Literary indicator
- Non-conventional Literature
- Descriptors DEI
- AQUEOUS SOLUTIONS; CESIUM HYDROXIDES; CRYSTAL STRUCTURE; CRYSTALLIZATION; GERMANIUM OXIDES; INFRARED SPECTRA; LATTICE PARAMETERS; NEODYMIUM OXIDES; PHASE DIAGRAMS; PHASE STUDIES; RUBIDIUM HYDROXIDES
- Descriptors DEC
- ALKALI METAL COMPOUNDS; CESIUM COMPOUNDS; CHALCOGENIDES; DIAGRAMS; DISPERSIONS; GERMANIUM COMPOUNDS; HOMOGENEOUS MIXTURES; HYDROGEN COMPOUNDS; HYDROXIDES; INFORMATION; MIXTURES; NEODYMIUM COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PHASE TRANSFORMATIONS; RARE EARTH COMPOUNDS; RUBIDIUM COMPOUNDS; SOLUTIONS; SPECTRA
Optional Information
- Notes
- 14 refs.; 4 figs.; 1 table. Imprint:Fiziko-khimicheskoe issledovanie soedinenij i splavov redkikh ehlementov.