13536-79-3

Usage

Uses

1. Scintillation Material:
Lanthanum Bromide is used as a scintillation material in certain applications due to its ability to emit light when exposed to ionizing radiation. This property makes it suitable for use in detectors and other devices that require the detection and measurement of radiation.
2. Synthesis of Lanthanum Compounds:
Lanthanum Bromide serves as a source in the synthesis of lanthanum and its derivatives, such as CsNaLa6Br14N2 and La3Br6N. These compounds contain rare bitetrahedral structural units, which are of interest in various research and industrial applications.
3. Solid State Synthesis:
Lanthanum Bromide is applied in the solid-state synthesis of CsNaLa6Br14N2 and La3Br6N, which are compounds with unique structural and electronic properties. These materials have potential applications in various fields, including optoelectronics, photonics, and advanced materials research.

InChI:InChI=1/3BrH.La/h3*1H;/q;;;+3/p-3

Upstream product

• 10035-10-6 hydrogen bromide 
• 7664-39-3 hydrogen fluoride 
• 7647-01-0 hydrogenchloride 
• 7726-95-6 bromine 
• 10025-67-9 disulfur dichloride 
• 7727-15-3 aluminium bromide 
• 10097-32-2 bromine 
• 13465-19-5 LaBr₃*3H₂O 
• 558-13-4 carbon tetrabromide 
• 10294-33-4 boron tribromide 

Downstream Products

• 7439-91-0 lanthanum 
• 169264-82-8 [La(C₁₈H₁₇N₃O₂)2Br₂]⁽¹⁺⁾*Br^(1-) = [La(C₁₈H₁₇N₃O₂)2Br₂]Br 
• 1232409-09-4 [LaBr(2,6-diisopropylphenyl(6-(2,6-dimethylphenyl)pyridin-2-yl)amine(-H))2(thf)] 
• 117453-62-0 La(III)(dibenzylsulphoxide)5(bromide)3 
• 13465-19-5 lanthanum bromide heptahydrate 
• 121461-93-6 La(C₆H₅C₃N₂(CH₃)2ONHCOCH₃)2Br₃ 

Relevant academic research and scientific papers

Spectrum analysis of U3+-doped LaBr3 single crystals. Part 1: Crystal-field analysis

Single crystals of U3+:LaBr3 were grown by the Bridgman-Stockbarger technique. High-resolution polarized absorption spectra of the crystals were recorded at 4.2 K in the 4000-50,000 cm-1 range. Sixty-four experimental crystal-field energy levels of the U3+ ion were fitted to a semiempirical Hamiltonian employing free-ion, one-electron crystal-field as well as two-particle correlation crystal-field (CCF) operators with an r.m.s. deviation of 28 cm-1. The performed analysis of the spectra enabled the determination of crystal-field parameters and assignment of the observed 5f3→5f3 transitions. The effects of selected CCF operators on the splitting of some specific U3+ multiplets have been investigated and the obtained values of Hamiltonian parameters are discussed and compared with those reported in previous analyses.

Room temperature fluorescence and excited state dynamics in the near infrared and visible region of U3+ doped LaBr3 single crystals

Good quality U3+ doped LaBr3 single crystals with a 0.1 mol% U3+ nominal concentration have been obtained by the Bridgman-Stockbarger method. Luminescence spectra of the crystals were recorded in a wide spectral range at room temperature. Excitation in the 5f 26d1 spectral region produced a strong red and near infrared emission.

La6Br10Fe: A La6Fe octahedron with a mixed M6X12/M6X8 type environment

The title compound was synthesized from La, LaBr3, and Fe under Ar atmosphere at 800°C. It crystallizes in space group P41 (No. 76) with lattice constants a = 8.255(1) A and c = 30.033(6) A. The structure features an isolated Fe-centered La6 octahedron with all corners, 9 of its 12 edges, and 3 of its 8 triangular faces coordinated, bridged, or capped by Br atoms. The La6Fe octahedron is significantly distorted, and the La coordination by Br atoms deviates from the common close-packing arrangements found in other reduced rare earth metal halides. Band structure, bonding, and physical properties of the compound have been investigated.

La8Br7Ni4: Ribbons of Ni hexagons in condensed La6 trigonal prisms

A ternary lanthanum bromide La8Br7Ni4 was synthesized from La, LaBr3, and Ni under an Ar atmosphere at 830 °C. It crystallizes in space group C2/m (No. 12) with lattice constants a = 29.528(4) A, b = 4.0249(6), c = 8.708(1) A, and β = 94.515(2)°. The structure features condensed Ni-centered La6 trigonal prisms. The Ni atoms are bonded to each other to form ribbons of Ni hexagons. Band structure, bonding, and physical properties of the compound have been investigated.

Isolated and edge-sharing interstitially stabilized metal tetrahedra {M4Z} in La4ZBr7, M9Z 4I16, and BaM4Z2I8 (M = La,Ce). The nature of Z

Metallothermic reductions of LaBr3, LaI3 and CeI 3 with barium metal resulted in single crystals of La 4ZBr7, M9Z4I16 and BaM4Z2I8 (M = La,Ce) as by-products, subject to apparently ubiquitous oxygen and/or nitrogen (= Z) impurities. The crystal structure of La4ZBr7 (1, orthorhombic, Pnma, Z = 4, a = 1212.4(1), b = 1404.8(2), c = 804.7(1) pm, R 1 = 0.0358 for I>2σI with N:O = 0.91:0.09) is determined by isolated {La4Z} tetrahedra surrounded by and connected through bromide ligands. In the crystal structure of Ce9Z4I 16 (2, orthorhombic, Fddd, Z = 8, a = 890.0(1), b = 2264.1(2), c = 4279.5(4) pm, R1 = 0.0262 for I>2σI with N:O = 0.75:0.25), {Ce4Z} tetrahedra are connected to {Ce4/2Z} chains via common edges and further to layers by iodide ligands. The layers are stacked and connected via the ninth cerium atom according to Ce[{Ce4/2Z}I 4]4. Similar {La4/2Z} chains and BaI 8/4 chains run perpendicularly to each other and are connected via common iodide ions in the crystal structure of BaLa4Z 2I8 = Ba2[{La4/2Z}I 4]4 (3, monoclinic, C2/c, Z = 4, a = 897.5(1), b = 2162.4(3), c = 1229.3(2), β = 110.32(1)°, R1 = 0.0261 for I>2σI with N:O = 0.54:0.46). The nature of the interstitial Z, oxygen and/or nitrogen, is evaluated.

La3Br3Ni: Jahn-Teller distortion in the reduced rare earth metal halide

A ternary lanthanum bromide La3Br3Ni was synthesized from lanthanum, LaBr3 and nickel under argon at 800 °C. It crystallizes in the tetragonal space group I4122 (No. 98) with lattice constants a = 12.1758(9) A a

La9Sb16Br3 and Ce9Sb 16Cl3: Stars and stripes in rare earth halide and intermetallic compounds

The title compounds were synthesized from Ln, LnX3 (Ln = La, Ce; X = Cl, Br), and Sb under an Ar atmosphere at 950°C. They crystallize in the space group P63/m (No. 176) with lattice constants a = 21.232(5) and 20.862(2) A and c = 4.323(2) and 4.2728(7) A for La9Sb 16Br3 and Ce9Sb16Cl3, respectively. The solids are the most metal-rich members in the reduced rare earth metal halide family and contain partial structures which are characteristic of reduced halides and intermetallic phases. These are the [Ln6X6]∞, hexagon stars, Sb-centered [Ln3Sb]∞ trigonal prismatic columns, and stripes of Sb square meshes. Computational analysis indicates that their electronic structure is valence-precise in the reduced halide part, but electron-deficient in the intermetallic part. Susceptibility and resistivity measurements reveal the metallic nature of the compounds.

Molar volume and ionic conduction in molten LaBr3

Prior to the measurements of physicochemical properties, bromination of La2O3 with NH4Br was attempted to obtain LaBr3 and study the optimum condition of this reaction. The molar volumes of the molten LaBr3 were measured in the range 1084 to 1122 K by dilatometry and fitted as a linear function by a least-squares method. The volume change on melting LaBr3 was evaluated from this result and the available crystallographic data to be 13.6%. The conductivities of molten LaBr3 were also measured by an a.c. technique and fitted by a quadratic function of temperature in the range 1088 to 1113 K. The molar conductivities were evaluated using the data of the molar volumes and conductivities. The results suggest that there exist some complexes in molten LaBr3 as well as LaCl3-6 in molten LaCl3.

La4N2S3: A new nitride sulfide of lanthanum with unprecedented crystal structure

The oxidation of lanthanum powder with sulfur and cesium azide (CsN 3) in the presence of lanthanum tribromide (LaBr3) yields lanthanum nitride sulfide with the composition La4N2S 3 when appropriate molar ratios of the reactants are used. Additional cesium bromide (CsBr) as a flux secures fast reactions (7 d) at 900 °C in evacuated silica tubes as well as the formation of almost black single crystals. The orthorhombic crystal structure (Pnnm, Z = 2) was determined from single crystal X-ray diffraction data (a = 641.98(4), b = 1581.42(9), c = 409.87(3) pm). Two crystallographically different La3+ cations are present, La1 resides in sixfold coordination of two N3- and four S2- anions forming a trigonal prism and La2 is coordinated by two N3- and five S2- in the shape of a monocapped trigonal prism. However, the main feature of the crystal structure comprises N3--centred (La 3+)4 tetrahedra which arrange as pairs [N 2La6]12+ of edge-shared [NLa4] 9+ units and which are further connected via four vertices to form double chains ∞1{[N2La 2La′4/2]6+}. They get bundled along [001] like a hexagonal rod packing and are held together by two crystallographically different S2- anions. Further motifs for the connectivity of [NM 4]9+ tetrahedra in crystal structures of nitride chalcogenides and halides of the rare-earth elements (M = Sc, Y, La; Ce - Lu) with ratios of N : M = 1 : 2 are presented and discussed for comparison.

Structural characterization of methanol substituted lanthanum halides

The first study into the alcohol solvation of lanthanum halide [LaX3] derivatives as a means to lower the processing temperature for the production of the LaBr3 scintillators was undertaken using methanol (MeOH). Initially the de-hydration of {[La(μ-Br)(H2O)7](Br)2}2 (1) was investigated through the simple room temperature dissolution of 1 in MeOH. The mixed solvate monomeric [La(H2O)7(MeOH)2](Br)3 (2) compound was isolated where the La metal center retains its original 9-coordination through the binding of two additional MeOH solvents but necessitates the transfer of the innersphere Br to the outersphere. In an attempt to in situ dry the reaction mixture of 1 in MeOH over CaH2, crystals of [Ca(MeOH)6](Br)2 (3) were isolated. Compound 1 dissolved in MeOH at reflux temperatures led to the isolation of an unusual arrangement identified as the salt derivative {[LaBr2.75·5.25(MeOH)]+0.25 [LaBr3.25·4.75(MeOH)]-0.25} (4). The fully substituted species was ultimately isolated through the dissolution of dried LaBr3 in MeOH forming the 8-coordinated [LaBr3(MeOH)5] (5) complex. It was determined that the concentration of the crystallization solution directed the structure isolated (4 concentrated; 5 dilute) The other LaX3 derivatives were isolated as [(MeOH)4(Cl)2La(μ-Cl)]2 (6) and [La(MeOH)9](I)3·MeOH (7). Beryllium Dome XRD analysis indicated that the bulk material for 5 appear to have multiple solvated species, 6 is consistent with the single crystal, and 7 was too broad to elucidate structural aspects. Multinuclear NMR (139La) indicated that these compounds do not retain their structure in MeOD. TGA/DTA data revealed that the de-solvation temperatures of the MeOH derivatives 4-6 were slightly higher in comparison to their hydrated counterparts.