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- Lanthanum (La) Metal Synonyms:
lanthanum metal powder, La, lanthanum metal lump, lanthanum metal pieces, lanthanum metal foil, lanthanum metal rod, CAS# 7439-91-0,
- Lanthanum (La) Metal Designations:
Chemical Name: Lanthanum
Chemical Formula: La
a) Lanthanum is silvery-white, soft, ductile, and malleable. It oxidizes rapidly when exposed to air and its reaction with water is temperature dependant. It is one of the most reactive of the rare earth metals.
b) The metal is superconducting at approximately 6K.
99.9% (REO basis)
Pieces, granules and powder
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Atomic Number
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57
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Molecular Weight (g/mol.)
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138.91
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Apparent Density (g/cm3)
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6.166
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Covalent Radius (pm)
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169
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Specific Heat @25°C (cal/g-°C)
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.045
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Melting Point (°C)
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920
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Boiling Point (°C)
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3469
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Thermal Conductivity (cal/s-cm°C)
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.033
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Magnetic Ordering
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Paramagnetic
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Electrical Resistivity
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(r.t.) (α, poly) 615 nΩ·m
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Inflammability (solid, gaseous)
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highly flammable
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EINECS Number:
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231-099-0
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Crystallography
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hexagonal structure
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- Lanthanum (La) Metal Typical Applications:
a) Nickel-metal hydride batteries is La(Ni3.6Mn0.4Al0.3Co0.7. A typical hybrid automobile battery for a Toyota Prius requires 10 to 15 kg (22-33 lb) of lanthanum. As engineers push the technology to increase fuel mileage, twice that amount of lanthanum could be required per vehicle.
b) Hydrogen sponge alloys can contain lanthanum. These alloys are capable of storing up to 400 times their own volume of hydrogen gas in a reversible adsorption process. Heat energy is released every time they do so; therefore these alloys have possibilities in energy conservation systems.
c) Mischmetal, a pyrophoric alloy used in lighter flints, contains 25% to 45% lanthanum.
Lanthanum oxide and the boride are used in electronic vacuum tubes as hot cathode materials with strong emissivity of electrons. Crystals of LaB6 are used in high brightness, extended life, thermionic electron emission sources for scanning electron microscopes and Hall effect thrusters.
d) Carbon lighting applications, especially by the motion picture industry for studio lighting and projection. These applications consume about 25% of the rare-earth compounds produced.
e) Small amounts of lanthanum added to steel improves its malleability, resistance to impact and ductility. Whereas addition of lanthanum to molybdenum decreases its hardness and sensitivity to temperature variations.
f) Small amounts of lanthanum are present in many pool products to remove the phosphates that feed algae.
g) Various compounds of lanthanum and other rare-earth elements (oxides, chlorides, etc.) are components of various catalysis, such as petroleum cracking catalysts.
h) Like horseradish peroxidase, lanthanum is used as an electron-dense tracer in molecular biology.
- Lanthanum (La) Metal News:
THE CRITICAL MATERIALS STRATEGY REPORT (Published by The U. S. Department of Energy) was released in December 2010. Visit: http://ow.ly/3pPdV.
ICAO/ IATA Class:= 4.1; Packaging Group= III
Listed (Radioactive). For further information please call the E.P.A. at +1.202.554.1404
CAS# 7439-91-0
3089 (pieces) and 1383 (powder)
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