1312-81-8

Basic information

• Product Name: Lanthanum oxide
• Synonyms: LANTHANUM OXIDE;LANTHANUM(III) OXIDE;LANTHANUM(+3)OXIDE;dilanthanumoxide;dilanthanumtrioxide;Lanthana;lanthania(la2o3);lanthanumoxide(la2o3)
• CAS NO: 1312-81-8
• Molecular Formula: La2O3
• Molecular Weight: 325.81
• EINECS: 215-200-5
• Product Categories: Inorganics;Lanthanum;57: La;LanthanumMaterials Science;LanthanumMetal and Ceramic Science;Nanoparticles: Oxides, Nitrides, and Other CeramicsNanomaterials;Catalysis and Inorganic Chemistry;Chemical Synthesis;Nanomaterials;Nanopowders and Nanoparticle Dispersions;Oxides;Alternative Energy;ElectrolytesChemical Synthesis;Materials Science;Atomic Absorption Spectroscopy (AAS);LanthanumSpectroscopy;Matrix Modifiers (for Graphite Furnace AAS);metal oxide
• Mol File: 1312-81-8.mol
• Article Data: 0

Chemical Properties

• Melting Point: 2315 °C
• Boiling Point: 4200 °C
• Flash Point: 4200°C
• Appearance: White to yellow/nanopowder
• Density: 6.51 g/mL at 25 °C(lit.)
• Storage Temp.: Storage temperature: no restrictions.
• Water Solubility: INSOLUBLE
• Sensitive: Hygroscopic
• Stability: Stable.
• Merck: 14,5363
• CAS DataBase Reference: Lanthanum oxide(CAS DataBase Reference)
• NIST Chemistry Reference: Lanthanum oxide(1312-81-8)
• EPA Substance Registry System: Lanthanum oxide(1312-81-8)

Safety Data

• Hazard Codes: Xi
• Statements: 36/37/38-36
• Safety Statements: 26-36-39
• WGK Germany: 1
• RTECS: OE5330000
• TSCA: Yes
• Hazardous Substances Data: 1312-81-8(Hazardous Substances Data)

Usage

Uses

Different sources of media describe the Uses of 1312-81-8 differently. You can refer to the following data:
1. Lanthanum Oxide, also called Lanthana, high purity Lanthanum Oxide (99.99% to 99.999%) is applied in making special optical glasses to improves the alkali resistance of glass, and is used in La-Ce-Tb phosphors for fluorescent lamps and making special optical glasses, such as infrared-absorbing glass, as well as camera and telescope lenses, Low grade of Lanthanum Oxide is widely used in ceramics and FCC catalyst, and also as raw material for Lanthanum Metal production; Lanthanum Oxide is also used as a grain growth additive during the liquid phase sintering of Silicon Nitride and Zirconium Diboride.
2. Lanthanum(III) oxide is used as a precursor to LAMOX fast ion conductors and superconductors. It is also used in the manufacture of optical glasses, piezoelectric and thermoelectric material. It is also useful for X-ray imaging intensifying screens, phosphors as well as dielectric and conductive ceramics. In addition, it is used as a catalyst to effect certain organic transformations. It is one of the active ingredients and finds application in thermoelectric and piezoelectric materials.
3. Lanthanum (III) oxide was used as an analytical standard in inductively coupled plasma atomic emission spectrometry (ICP-AES) for chemical characterization of ancient pottery.
4. Lanthanum oxide is used to make high-quality glass, ceramics, carbon-arc electrodes, and fluorescent lamps.

Chemical Properties

white powder

Physical properties

White amorphous powder; density 6.51 g/cm3; melts at 2,305°C; vaporizes at 4,200°C; insoluble in water; dissolves in dilute mineral acids.

Preparation

Lanthanum oxide can be produced by direct combustion of lanthanum in oxygen or air. The oxide also may be prepared by decomposition of an oxo salt of lanthanum, such as nitrate, sulfate, carbonate, hydroxide or oxalate. La(CO3)3?8H2O → La2O3 + 3CO2 + 8H2O 2La2(C2O4)3?9H2O + 3O2 → 2La2O3 + 12CO2 + 18H2O

General Description

Lanthanum (III) oxide is an alkaline earth oxide, and is a diamagnetic, isostructural analog of neodymium oxide. It is also an efficient recyclable catalyst, and can be used in coupling various aryl halides with aromatic/alkyl thiols.

Flammability and Explosibility

Nonflammable

Industrial uses

Lanthanum oxide (La2O3) has a melting pointof 2250°C, is soluble in acids, and very slightlysoluble in water. This oxide of a rare earth elementoccurs in monazite and bastnasite. It ismarketed as the oxide or as other salts such asthe oxalate, nitrate, or hydrate. It quicklyabsorbs water and CO2 from the atmosphere.Its chief use is as an ingredient in nonsilica,rare element optical glass with oxides of tungsten, tantalum, and thorium. Lanthanumincreases refractive index, decreases dispersion,and is also used in x-ray image intensifyingscreens that speed up x-ray exposure asmuch as two to ten times so that diagnosticdosages may be reduced by as much as 80%with fewer retakes. It is also used in bariumtitanate capacitors.

InChI:InChI=1/2La.3O/rLa2O3/c3-1-5-2-4

Related news

Thermo-physical properties of water based Lanthanum oxide (cas 1312-81-8) nanofluid. An experimental study08/15/2019

The aim of the paper is the experimental investigation of the thermo-physical properties and efficiency of a new type of nanofluid with high potential in thermal applications, namely the water based lanthanum oxide nanofluid. The nanoparticles of La2O3 were synthesized and characterized using XD...detailed