| Identification | More | [Name]
LANTHANUM FLUORIDE | [CAS]
13709-38-1 | [Synonyms]
LANTHANUM FLUORIDE
LANTHANUM(III) FLUORIDE
Lanthanum trifluoride
LaF3
Lanthanum fluoride (LaF3)
lanthanumfluoride(laf3)
Lanthanumfluoride1
Lanthanumfluoride2
LanthanumfluorideanhydrousREOwhitepowder
Lanthanum fluoride, anhydrous
LANTHANUM FLUORIDE, ANHYDROUS, POWDER, 9 9.99%
Lanthanum(III) fluoride, 99.90%
LANTHANUM FLUORIDE, 99.9%
LANTHANUM FLUORIDE, 99.999%
Lanthanum(III)fluoride,anhydrous(99.9%-La)(REO)
Lanthanum(III)fluoride,anhydrous(99.99%-La)(REO)PURATREM
lanthanum(iii) fluoride, anhydrous
lanthanum(iii) fluoride, anhydrous, reacton
lanthanum(iii) fluoride, optical grade
LANTHANUMFLUORIDE,LUMP | [EINECS(EC#)]
237-252-8 | [Molecular Formula]
F3La | [MDL Number]
MFCD00011073 | [Molecular Weight]
195.9 | [MOL File]
13709-38-1.mol |
| Chemical Properties | Back Directory | [Appearance]
off-white powder | [Melting point ]
1493 °C | [density ]
5.936 g/mL at 25 °C(lit.)
| [refractive index ]
1.6029 | [solubility ]
insoluble in H2O, acid solutions | [form ]
powder
| [color ]
White | [Specific Gravity]
5.936 | [Water Solubility ]
Soluble in strong mineral acids. Insoluble in water. | [Sensitive ]
Hygroscopic | [Exposure limits]
ACGIH: TWA 2.5 mg/m3
NIOSH: IDLH 250 mg/m3; TWA 2.5 mg/m3 | [Stability:]
hygroscopic | [InChIKey]
BYMUNNMMXKDFEZ-UHFFFAOYSA-K | [CAS DataBase Reference]
13709-38-1(CAS DataBase Reference) | [EPA Substance Registry System]
Lanthanum fluoride (LaF3) (13709-38-1) |
| Safety Data | Back Directory | [Hazard Codes ]
Xi | [Risk Statements ]
R36/37/38:Irritating to eyes, respiratory system and skin . | [Safety Statements ]
S22:Do not breathe dust .
S24/25:Avoid contact with skin and eyes . | [RIDADR ]
3288 | [WGK Germany ]
3
| [Hazard Note ]
Hygroscopic | [TSCA ]
Yes | [HazardClass ]
6.1 | [PackingGroup ]
III | [HS Code ]
28469033 |
| Questions And Answer | Back Directory | [Description]
Lanthanum trifluorides (chemical formula: LaF3) is a kind of high-melting, ionic compound of lanthanum and fluorine. It is a component of the multimetal fluoride glass such as ZBLAN. It is majorly used as a solid membrane electrode for manufacturing the into fluoride sensitive (F-1) Ion-selective probes. It also has applications in fiber optics, fluorescent lamps and radiation applications. Lanthanum fluoride can also be doped with Nd3+ and has special applications as a scintillating material.
| [Uses]
Lanthanum fluoride is used in phosphor lamp coating. Mixed with other rare earths, it is used in carbon arc electrodes and lasers. Also, the fluoride is used in the production of lanthanum metal, an intermediate step in the manufacture of high purity metal.
Lanthanum fluoride, is mainly applied in specialty glass, water treatment and catalyst, and also as the main raw materials for making Lanthanum Metal. Lanthanum Fluoride (LaF3) is an essential component of a heavy Fluoride glass named ZBLAN. This glass has superior transmittance in the infrared range and is therefore used for fiber-optical communication systems. Mixed with Europium Fluoride, it is also applied in the crystal membrane of Fluoride ion-selective electrodes.
| [Preparation]
Lanthanum fluoride may be precipitated by adding hydrofluoric acid to an aqueous solution of lanthanum nitrate or chloride:
La(NO3)3 + 3HF → LaF3 + 3HNO3
The compound also can be made by heating lanthanum oxide with ammonium fluoride in hydrofluoric acid at 300 to 400°C. Ammonium fluoride released in the reaction sublimes at this temperature:
La2O3 + 6NH4F•6HF → 2LaF3 + 6NH4F↑ + 3H2O↑
Anhydrous lanthanum fluoride also may be made by passing dry hydrogen fluoride over lanthanum oxide. This process, however, produces trace amounts of lanthanum oxyfluoride, LaOF. Highly purified material may be obtained by passing dry purified HF over molten fluoride in a platinum crucible.
| [References]
http://172.16.24.179/www.crystran.co.uk/userfiles/files/lanthanum-fluoride-laf3-ion-selective-electrodes.pdf
https://en.wikipedia.org/wiki/Lanthanum_trifluoride
http://www.azom.com/article.aspx?ArticleID=2348
|
| Hazard Information | Back Directory | [Chemical Properties]
off-white powder | [Physical properties]
White hexagonal crystal; hygroscopic; density 5.9 g/cm3; melts at 1,493°C; insoluble in water and acids. | [Flammability and Explosibility]
Nonflammable | [Structure and conformation]
The space lattice of LaF3 belongs to the tysonite structure. |
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