Published August 1989
| Version v1
Journal article
Three bromides of lanthanum: LaBr2, La2Br5, and LaBr3
- 1. Hannover Univ. (Germany, F.R.). Inst. fuer Anorganische Chemie
- 2. Giessen Univ. (Germany, F.R.)
Description
Colourless LaBr3 was obtained via the ammonium-bromide route and in single-crystalline form by chemical vapour-phase transport with aluminium tribromide. Black single crystals of LaBr2 and La2Br4 have been grown from the melts that are obtained by lithium reduction of lanthanum tribromide in sealed tantalum ampoules at 850 0C. The crystal structures of the three bromides of lanthanum were refined: LaBr2. 2 H2-MoS2 type, hexagonal (P63/mmc), a = 409.88(4) pm, c = 1390.0(1) pm, R = Rw = 0.092; La2Br5. Pr2I5 type, monoclinic (P21/m), a = 789.09(6) pm, b = 424.89(4) pm, c = 1342.3(1) pm, β = 91.60(1)0, R = 0.067, Rw = 0.055; LaBr3. UCl3 type, hexagonal (P63/m), a = 797.13(4) pm, c = 452.16(4) pm, R = 0.036, Rw = 0.032. (author)
Additional details
Publishing Information
- Journal Title
- Zeitschrift fuer Anorganische und Allgemeine Chemie
- Journal Volume
- 575
- Series
- Z. Anorg. Allg. Chem.
- Journal Page Range
- 61-70
- ISSN
- 0044-2313
- CODEN
- ZAACA
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- German Democratic Republic
- INIS RN
- 21039218
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- BOND ANGLE; CHEMICAL PREPARATION; CHEMICAL REACTIONS; EXPERIMENTAL DATA; HEXAGONAL LATTICES; INTERATOMIC DISTANCES; LANTHANUM BROMIDES; LATTICE PARAMETERS; MASS TRANSFER; MILLER INDICES; MONOCRYSTALS; SPACE GROUPS; STRUCTURAL CHEMICAL ANALYSIS; TEMPERATURE GRADIENTS; X-RAY DIFFRACTION
- Descriptors DEC
- BROMIDES; BROMINE COMPOUNDS; COHERENT SCATTERING; CRYSTAL LATTICES; CRYSTAL STRUCTURE; CRYSTALS; DATA; DIFFRACTION; DISTANCE; HALIDES; HALOGEN COMPOUNDS; INFORMATION; LANTHANUM COMPOUNDS; NUMERICAL DATA; RARE EARTH COMPOUNDS; SCATTERING; SYMMETRY GROUPS; SYNTHESIS