Synthesis and crystal structure of Ln[sub 3](OH)(CrO[sub 4])[sub 4] 3. 5H[sub 2]O (Ln = Pr, Nd) and Ln[sub 2](OH)[sub 2] (CrO[sub 4])[sub 2] (Ln = Tb, Gd): Thermal behavior and infrared spectra of Pr[sub 3](OH) (CrO[sub 4])[sub 4] 3. 5H[sub 2]O and Gd[sub 2](OH)[sub 2](CrO[sub 4])[sub 2]
Journal Article
·
· Journal of Solid State Chemistry; (United States)
- Univ. of Jyvaeskylae (Finland)
Crystal structures of Ln[sub 2](OH)[sub 2](CrO[sub 4])[sub 2] (Ln = Gd, Tb) and Ln[sub 3](OH)(CrO[sub 4])[sub 4] 3.5H[sub 2]O (Ln = Pr, Nd) were determined by a conventional single-crystal X-ray diffraction technique. Crystals of Ln[sub 2](OH)[sub 2] (CrO[sub 4])[sub 2](Ln = Gd, Tb) are monoclinic, space group P2[sub 1]/c (no.14). In Ln[sub 3](OH)(CrO[sub 4])[sub 4] 3.5H[sub 2]O (Ln = Pr, Nd) the coordination polyhedron of the nine oxygen atoms around Ln atoms is a tricapped trigonal prism. In Ln[sub 2](OH)[sub 2](CrO[sub 4])[sub 2] (Ln = Gd, Tb) the coordination polyhedron of the eight oxygen atoms around Ln atoms is a square antiprism. Structures form a three-dimensional network. Thermal behavior was investigated and IR spectra were recorded for Pr[sub 3](OH)(CrO[sub 4]) 3.5H[sub 2]O and Gd[sub 2](OH)[sub 2](CrO[sub 4])[sub 2]. Thermal decomposition of Pr[sub 3](OH)(CrO[sub 4])[sub 4] 3.5H[sub 2]O begins by the loss of water molecules and follows by the mechanism described for Yb[sub 2](OH)[sub 2](CrO[sub 4])[sub 2] and Ln[sub 2](CrO[sub 4])[sub 3] 7H[sub 2]O (Ln = La, Pr, Nd, Sm, Eu, Gd).
- OSTI ID:
- 5067476
- Journal Information:
- Journal of Solid State Chemistry; (United States), Journal Name: Journal of Solid State Chemistry; (United States) Vol. 106:2; ISSN 0022-4596; ISSN JSSCBI
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ABSORPTION SPECTROSCOPY
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CHROMATES
CHROMIUM COMPOUNDS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DECOMPOSITION
GADOLINIUM COMPOUNDS
HYDRATES
HYDROGEN COMPOUNDS
HYDROXIDES
MONOCLINIC LATTICES
NEODYMIUM COMPOUNDS
OXYGEN COMPOUNDS
PRASEODYMIUM COMPOUNDS
RARE EARTH COMPOUNDS
SPECTROSCOPY
SYNTHESIS
TERBIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
400201* -- Chemical & Physicochemical Properties
ABSORPTION SPECTROSCOPY
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CHROMATES
CHROMIUM COMPOUNDS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DECOMPOSITION
GADOLINIUM COMPOUNDS
HYDRATES
HYDROGEN COMPOUNDS
HYDROXIDES
MONOCLINIC LATTICES
NEODYMIUM COMPOUNDS
OXYGEN COMPOUNDS
PRASEODYMIUM COMPOUNDS
RARE EARTH COMPOUNDS
SPECTROSCOPY
SYNTHESIS
TERBIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS