lanthanum(III) fluoride
lanthanum
Conditions | Yield |
---|---|
With lithium In neat (no solvent) reduction at 1000K, under He, Mo-vessel;; | 98.4% |
In neat (no solvent) 1mol I2 per 1.5mol LaF3;; product containing 470ppm C and 213ppm N;; | 94% |
In gas electric discharge in presence of H2;; intermediate formation of LaF indicated by MS; |
lanthanum
Conditions | Yield |
---|---|
In ethylenediamine Electrolysis; 1.77g La/l (in form of nitrate), 250-300VV, 20mA (2.3mA/cm**2);; | 96.2% |
In ethanol Electrolysis; Hg cathode, satd. soln. in abs. ethanol, current density 0.3A/cm**2, 4h; formation of La amalgame;; |
lanthanum(III) chloride
lanthanum
Conditions | Yield |
---|---|
With Mg or Ca In neat (no solvent) booster: I2, addn. of o.5mol dry I2 or 0.3mol I2 and 0.0625mol KClO4 per 1mol LaCl3, CaO-coated bomb; decrease of react. temp. to 850°C on addn. of 20mol-% KCl (flux);; | 91% |
In melt Electrolysis; electrolyte: LaCl3, KCl, 1-5wt.-% CaF2, 960-980°C, 7V, 12A, cathodic current density 4A/cm**2, coal anode (with caps of fluorite and porcelain), Mo cathode;; product free from Ca and Al, small amounts of Si and Fe;; | 65% |
In melt Electrolysis; melt (in wt.-%): 27% LaCl3, 68 KCl, 5 CaF2, graphite anode, Mo cathode, 100°C, cathodic current density 7A/cm**2, current yield 50%;; | 60% |
lanthanum(III) bromide
lanthanum
Conditions | Yield |
---|---|
With potassium In neat (no solvent) passing K-vapor over LaBr3 in vac.;; | 90% |
lanthanum(III) iodide
lanthanum
Conditions | Yield |
---|---|
In gas Van Arkel-De Boer-process, 1000-1100°C;; | 20% |
B
lanthanum
Conditions | Yield |
---|---|
In neat (no solvent) byproducts: H2O, CO, CO2; heated in air at 970°C; detd. by X-ray diffraction, IR spectra, thermogravimetry and DTA; | A n/a B 1% C n/a D 1% |
lanthanum
Conditions | Yield |
---|---|
With magnesium byproducts: MgO; | |
With aluminium In neat (no solvent) byproducts: AlO; reduction in vac. at 800-1500°C;; | |
With (3S,3aS,4S,4aS,6S,8aR,8bR,11S)-6,11-dihydroxy-3-methyl-12-methylene-2-oxo-4a,6-ethano-3,8b-prop-1-enoperhydroindeno[1,2-b]furan-4-carboxylic acid In neat (no solvent) no reduction at 298 to 2000K;; | 0% |
In melt Electrolysis; 26mol-% LaF3, 30-80mol-% LiF, 5-50mol-% BaF2, graphite anode, Mo cathode, 8-15V, 400-800A, contineuous process;; | >97 |
With Hg; HCl; acetic acid In hydrogenchloride byproducts: H2; Electrochem. Process; soln. La2O3 in HCl; amalgamation on Hg cathode in buffer pH=3.4-3.7 (CH3COOH, CH3COONa); decomposed at 900-1250°C below 1E-6 Torr; various product yields (36-70.9%) for various conditions; amalgam rinsed (H2O, EtOH); degassed at 1000°C in vac.; elem. anal.; |
Conditions | Yield |
---|---|
vapor of the oxide studied by MS; detected by MS; |
Conditions | Yield |
---|---|
1000-1700°C, in vac.; |
Conditions | Yield |
---|---|
In melt Electrolysis; 73 wt.-% LaF3, 15 wt.-% LiF, 12 wt.-% BaF2, La2O3, 810-830°C, 11V, 249A, 11A7cm**2 (cathode), 4.4A/cm**2 (anode), 132 min, energy consumption: 7.5kWh/kg;; pure metal;; | |
In melt Electrolysis; melt of LiF and LaF3 with 2% La2O3, 95A, 27V, current density in the beginning: 1.0A/cm**2 (anode), 31.4A/cm**2 (cathode), 850-1000°C;; purity 99.8%;; |
lanthanum
Conditions | Yield |
---|---|
In further solvent(s) Electrolysis; all manipulations under Ar atm.; LaNi5 alloy ingot (as anode) electrolyzed in molten salt containing 59 mol% LiCl-41 mol% KCl with steel cathodeat 793 K vs. Ag(1+)/Ag; |
zirconium
zirconium(IV) fluoride
lanthanum(III) fluoride
A
lanthanum
Conditions | Yield |
---|---|
In melt treatment of LaF3 (2-10 wt%) with Zr (Zr:LaF3=4:1) in mixt. of NaF (51 mol%) and ZrF4 (49 mol%); outgassing at 200 and 400°C for 1 h; heating to 570-650°C in Ar; monitoring by XRD; |
zirconium
lanthanum(III) fluoride
A
lanthanum
B
zirconium(IV) fluoride
Conditions | Yield |
---|---|
With NaF; LiF In melt byproducts: NaLaF4, LiLaF4; heating of LaF3 and Zr in molten mixt. of 39 mol % NaF and 61 mol % LiF at 465 - 625°C; monitoring by differential thermal XRD and IR; |
lanthanum
Conditions | Yield |
---|---|
With tantalum In neat (no solvent) heating a pressed mixture of LaC2 and Ta (99.7 wt.-% Ta) under Ar to 1800-1900°C; distn. >2000°C;; |
lanthanum
Conditions | Yield |
---|---|
In ethanol Electrolysis; Hg cathode, satd. soln. in abs. ethanol, current density 0.2A/cm**2, 3h; formation of La amalgame;; |
lanthanum
Conditions | Yield |
---|---|
In neat (no solvent) Irradiation (UV/VIS); lanthanide compd. photodissociation by excimer laser irradiation at 248 nm; LIF detection; |
lanthanum chloride hydrate
lanthanum
Conditions | Yield |
---|---|
In ethanol Electrolysis; 20g LaCl3*H2O in 100ml ethanol, Hg cathode, 20V, current density 0.02A/cm**2, 30h, formation of an amalgame with 2.5-3 wt.-% La, washing with ethanol and ether, generation of La by decompn.;; |
lanthanum
Conditions | Yield |
---|---|
In gaseous matrix Irradiation (UV/VIS); 248 nm photodissociation (excimer laser); buffer gas N2; LIF detection; |
Conditions | Yield |
---|---|
In ethanol Electrolysis; coprecipitation with La;; | |
In ethanol |
Conditions | Yield |
---|---|
In solid decompn. at 1910-2313K; not isolated; MS; |
Conditions | Yield |
---|---|
In neat (no solvent) thermal dehydration in dynamic high vacuum (850°C, 20h, end pressure: 1E-5mbar);; | A n/a B 0% C n/a |
Conditions | Yield |
---|---|
In neat (no solvent, solid phase) Irradiation (UV/VIS); laser ablation of La-Ca-Mn-O target (mixture of oxides, nominal composition La0.67Ca0.33MnO3, calcination at 800°C for 5 h); laser beam 532nm (Nd:YAG laser); quadrupole and TOF mass spectrometry; |
Conditions | Yield |
---|---|
In melt reduction LaI3 with Na (1:2.2) in Ta container at 500-550°C for 3days; |
lanthanum
Conditions | Yield |
---|---|
Stage #1: N,N'-p‐phenylenebis(salicylideneimine)diaqua lanthanum chloride heptahydrate at 30 - 183℃; Stage #2: at 184 - 750℃; |
F6La(3-)
lanthanum
Conditions | Yield |
---|---|
With (LiF)0.465(NaF)0.115(KF)0.42 In melt at 649.84℃; Kinetics; Temperature; Electrochemical reaction; |
lanthanum
Conditions | Yield |
---|---|
at 340 - 470℃; |
Conditions | Yield |
---|---|
In neat (no solvent) stoich. mixt. sealed in Ta tubes under Ar; Ta tubes sealed in silica ampoules (1E-2 mbar); heated (900°C, 20 d); | 100% |
Conditions | Yield |
---|---|
In neat (no solvent) stoich. mixt. heating in sealed Ta capsule under Ar at 1450 K for 7 d; | 100% |
In neat (no solvent) dry Ar-atmosphere; stoich. amts., sealed Ta-capsule, 1450 K, 7 d; quenching in cold water; |
Conditions | Yield |
---|---|
In neat (no solvent) stoich. mixt. heating in sealed Ta capsule under Ar at 1370 K for 10 d; | 100% |
In neat (no solvent) dry Ar-atmosphere; stoich. amts., sealed Ta-capsule, 1370 K, 10 d; quenching in cold water; |
Conditions | Yield |
---|---|
In neat (no solvent) under Ar, stoich. amt. of starting materials were heated at 950 °C for 20 days, Ta-tube in an evacuated silica ampoule; | 100% |
Conditions | Yield |
---|---|
In neat (no solvent) stoich. mixt. sealed in Ta tubes under Ar; Ta tubes sealed in silica ampoules (1E-2 mbar); heated (850°C, 20 d); | 100% |
Conditions | Yield |
---|---|
In neat (no solvent) stoich. mixt. sealed in Ta tubes under Ar; Ta tubes sealed in silica ampoules (1E-2 mbar); heated (950°C, 33 d); | 100% |
Conditions | Yield |
---|---|
In neat (no solvent) under Ar, stoich. amt. of starting materials were heated at 1150 °C for 6 days, Ta-tube in an evacuated silica ampoule; | 100% |
Conditions | Yield |
---|---|
In neat (no solvent) under Ar, stoich. amt. of starting materials were heated at 1150 °C for 2 days, Ta-tube in an evacuated silica ampoule; | 100% |
Conditions | Yield |
---|---|
In neat (no solvent) under Ar, stoich. amt. of starting materials were heated at 1100 °C for 3 days, Ta-tube in an evacuated silica ampoule; | 100% |
N,N,N,N,N,N-hexamethylphosphoric triamide
lanthanum
(C8H8)La(OP(N(CH3)2)3)4(1+)*La(C8H8)2(1-)=[(C8H8)La(OP(N(CH3)2)3)4][La(C8H8)2]
Conditions | Yield |
---|---|
iodine In tetrahydrofuran Ar-atmosphere; stirring (50°C, 10 d); crystn. on concg. (-20°C); | 100% |
Conditions | Yield |
---|---|
at 299.84 - 999.84℃; | A 100% B n/a |
Conditions | Yield |
---|---|
With rubidium chloride at 700℃; for 96h; Sealed tube; | 99.5% |
With rubidium chloride; lithium chloride In neat (no solvent) La, Te, RbCl and LiCl mixed; mixt. in vac. quartz ampoules heated and kept at 650°C for 50 h; gradually cooled to 540°C in 100 h; XRD; | |
In melt mixt. of element powders sealed in quartz ample together with of the flux (LiCl:RbCl=1:1); ample kept at 650°C for two ds; temp. gradually lowered to 540°C in 4 ds; |
Conditions | Yield |
---|---|
In melt heating lanthanum, gold and indium in molar ratio 1:2:4 to 1000 for 10 hin vac., keeping at 1000°C for 120 h; cooling to room temp. for 48 h, X-ray anal.; | 99% |
Conditions | Yield |
---|---|
With sodium In isopropyl alcohol byproducts: NaCl, H2; dry educts; dry atmosphere;; NaCl centrifuged off; evapd.; dried under 1 torr vacuum at 110°C; elem. anal.;; | 99% |
Conditions | Yield |
---|---|
In neat (no solvent) La/LaI3/Ru in a 2/1/1 mole ratio in Nb tube heated to 900°C for 7wk; | 99% |
Conditions | Yield |
---|---|
With NaBr In neat (no solvent, solid phase) byproducts: NaBr; calcd. amts. of elements and compds. reacted in evacuated silica tube with excess NaBr as flux at 850°C for 7 d; | 99% |
Conditions | Yield |
---|---|
In neat (no solvent) (Ar); heating stoich. mixt. of lanthanum, lanthanum bromide and iron at 800°C for 21 d; powder X-ray; | 99% |
Conditions | Yield |
---|---|
With Sb2Se3 In melt the mixt. of U, La, Se and Sb2Se3 as flux was placed in the furnace heated to 1123 K in 17 h, kept at 1123 K for 6 days, cooled to 673 K in 150 h, annealed at 673 K for 7 days; sepd. manually; | A n/a B 99% |
Conditions | Yield |
---|---|
In hydrogenchloride Schlenk techniques; dissolution La in concd. aq. HCl (37%); | 99% |
Conditions | Yield |
---|---|
In hydrogen bromide aq. HBr; Schlenk techniques; dissolution La in concd. aq. HBr (48%); | 99% |
Conditions | Yield |
---|---|
In further solvent(s) Schlenk techniques; dissolution La in concd. aq. HI (55%); | 99% |
Conditions | Yield |
---|---|
In tetrahydrofuran byproducts: Hg; under N2 using Schlenk techniques; La powder (5.0 mmol) mixed with Hg(SCN)2 (2.5 mmol); thf added; stirred (ambient temp., 5 d); settled; filtered; concd.; crystd. (5°C); elem. anal.; | 99% |
lanthanum
Conditions | Yield |
---|---|
With hydrogenchloride; sodium chloride In tetrahydrofuran; nitromethane; water | A 98% B n/a |
Conditions | Yield |
---|---|
at 700 - 1100℃; for 336h; Sealed tube; Inert atmosphere; | 97% |
lanthanum
copper (I) tert-butoxide
B
copper
Conditions | Yield |
---|---|
In 1,2-dimethoxyethane all operations in sealed evacuated tubes with thoroughly dried and degassed solvents; La cutting and t-BuOCu stirred at ca. 20° for 35 h; excess of La and copper ppt. sepd. by centrifugation; reaction mixt. concd. and kept at 80° until complete dissolution of a finely dispersed ppt.; cooled slowly to 20°; crystals sepd. and dried in vacuo; identified by elem. anal.; | A 75.6% B 95.6% |
The Lanthanum, with the CAS registry number 7439-91-0, belongs to the product categories of Inorganics; LanthanumSpectroscopy; LChemical Synthesis; AA Standard SolutionsAnalytical Standards; AAS; Alphabetic; Matrix Selection; NitrateSpectroscopy; Reference/Calibration Standards; Single Solution; Catalysis and Inorganic Chemistry; Chemical Synthesis; Lanthanum; LanthanumMetal and Ceramic Science; Metals; LanthanumReference/Calibration Standards; Analytical Reagents; Atomic Absorption Spectroscopy (AAS); Matrix Modifier SolutionsSpectroscopy; Matrix Modifiers (for Graphite Furnace AAS)Analytical/Chromatography; Standard Solutions; Trace Analysis Reagents; Metal or element. Its EINECS registry number is 231-099-0. This chemical's molecular formula is La and molecular weight is 138.91. What's more, its IUPAC name is the same with its product name. This chemical is a malleable, ductile, and soft metal that oxidizes rapidly when exposed to air. It is produced from the minerals monazite and bastnäsite using a complex multistage extraction process. Lanthanum compounds have numerous applications as catalysts, additives in glass, carbon lighting for studio lighting and projection, ignition elements in lighters and torches, electron cathodes, scintillators, and others.
Physical properties about Lanthanum are: (1)Phase: solid; (2)Density (near r.t.): 6.162 g·cm-3; (3)Liquid density at m.p.: 5.94 g·cm-3; (4)Melting point: 920 °C; (5)Boiling point: 3464 °C; (6)Heat of fusion: 6.20 kJ·mol-1; (7)Heat of vaporization: 402.1 kJ·mol-1; (8)Molar heat capacity: 27.11 J·mol-1;(9)#H bond acceptors: 0; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 0; (12)Polar Surface Area: 0 Å2.
Uses of Lanthanum: it is used to produce other chemicals. For example, it can react with O2 to get lanthanum(III) oxide. The reaction need the temperature of 150 °C.
4 La + 3 O2 → 2 La2O3
When you are dealing with this chemical, you should be very careful. This chemical may catch fire in contact with air, only need brief contact with an ignition source and have a very low flash point or evolve highly flammable gases in contact with water. It reacts violently with water and liberates extremely flammable gases. In addition, it is toxic by inhalation, in contact with skin and if swallowed. Therefore, you should keep away from sources of ignition and not breathe gas/fumes/vapour/spray. You must wear suitable protective clothing, gloves, eye/face protection and take off immediately all contaminated clothing. In case of contacting with eyes, you should rinse immediately with plenty of water and seek medical advice. And in case of accident or if you feel unwell seek medical advice immediately.
You can still convert the following datas into molecular structure:
(1) SMILES: [La]
(2) InChI: InChI=1S/La
(3) InChIKey: FZLIPJUXYLNCLC-UHFFFAOYSA-N
About|Contact|Cas|Product Name|Molecular|Country|Encyclopedia
Message|New Cas|MSDS|Service|Advertisement|CAS DataBase|Article Data|Manufacturers | Chemical Catalog
©2008 LookChem.com,License: ICP
NO.:Zhejiang16009103
complaints:service@lookchem.com Desktop View