Double tungstate K/sub 5/La(WO/sub 4/)/sub 4/. [Attempts to prepare K/sub 5/Ln(WO/sub 4/)/sub 4/ (Ln = La to Gd, Y)]
Journal Article
·
· Inorg. Mater. (USSR) (Engl. Transl.); (United States)
OSTI ID:7361594
The possibility of formation of K/sub 5/Ln(WO/sub 4/)/sub 4/ was investigated for Ln = La, Ce, Pr, Nd, Sm, Eu, Gd, and Y; solid-phase reaction and crystallization from K/sub 2/W/sub 2/O/sub 7/ melt were used for the synthesis. X-ray phase analysis showed that only the compound K/sub 5/La(WO/sub 4/)/sub 4/ was formed; the others formed a mixture of two phases, KLn(WO/sub 4/)/sub 2/ and K/sub 2/WO/sub 4/. K/sub 5/La(WO/sub 4/)/sub 4/ melts at 820 +- 20/sup 0/C; it is isostructural with palmierite, and its hexagonal lattice constants are a = 6.030 +- 0.008 A and c = 20.89 +- 0.04 A. (DLC)
- Research Organization:
- Inst. of Inorganic Chemistry, Novosibirsk, USSR
- OSTI ID:
- 7361594
- Journal Information:
- Inorg. Mater. (USSR) (Engl. Transl.); (United States), Journal Name: Inorg. Mater. (USSR) (Engl. Transl.); (United States) Vol. 11:11; ISSN INOMA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALKALI METAL COMPOUNDS
CHEMICAL PREPARATION
CRYSTAL STRUCTURE
LANTHANUM COMPOUNDS
LANTHANUM TUNGSTATES
LATTICE PARAMETERS
MELTING POINTS
PHYSICAL PROPERTIES
POTASSIUM COMPOUNDS
POTASSIUM TUNGSTATES
RARE EARTH COMPOUNDS
SYNTHESIS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
TUNGSTATES
400201* -- Chemical & Physicochemical Properties
ALKALI METAL COMPOUNDS
CHEMICAL PREPARATION
CRYSTAL STRUCTURE
LANTHANUM COMPOUNDS
LANTHANUM TUNGSTATES
LATTICE PARAMETERS
MELTING POINTS
PHYSICAL PROPERTIES
POTASSIUM COMPOUNDS
POTASSIUM TUNGSTATES
RARE EARTH COMPOUNDS
SYNTHESIS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
TUNGSTATES