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Rare-earth compounds containing lanthanum are extensively used in carbon lighting applications, especially by the motion picture industry for studio lighting and projection. This application consumes about 25 percent of the rare-earth compounds produced.
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periodic.lanl.gov/elements/57.html
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Lanthanum, La, is a silvery transition metallic element and is the first member of the lanthanide series of transition elements, found in Group IIIa of the periodic table.
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www.ucc.ie/academic/chem/dolchem/html/elem/elem057.html
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Lanthanum - Wikipedia, the free encyclopedia
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Lanthanum (pronounced /ˈlænθənəm/ ) is a chemical element with the symbol La and atomic number 57. Lanthanum is a silvery white metallic element that belongs to group 3 of the periodic table ...
en.wikipedia.org/wiki/Lanthanum
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Lanthanum is used as electrodes for high-intensity, carbon-arc lights, the kind that is used in commercial motion picture projectors and searchlights. Lanthanum compounds are used in glass and ceramics, as phosphors in fluorescent lamps.
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nobel.scas.bcit.ca/resource/ptable/la.htm
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The oxide and the boride are used in electronic vacuum tubes. The oxide is added to optical glass to increase its alkali resistance and refractive index. Lanthanum may be used in making ductile cast iron ; alloyed with other metals, it is u...
http://qanda.encyclopedia.com/question/lanthanum-used-4...
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Brief description: lanthanum is silvery white, malleable, ductile, and soft enough to be cut with a knife. It is one of the The metal reacts directly with elemental carbon, nitrogen, boron, selenium, silicon, phosphorus, sulphur, and with halogens. It is a component of, misch metal (used for making lighter flints).
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www.webelements.com/webelements/elements/text/La/key.ht...
www.webelements.com/webelements/elements/text/La/key.html
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Lanthanum is found with rare earths in monazite and bastnasite. Monazite sand typical contains 25% lanthanum. It is used in the electrodes of high-intensity, carbon-arc lights. Because it gives glass refractive properties, it is used in expensive camera lenses.
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www.ktf-split.hr/periodni/en/la.html
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Perovskite type manganese oxides are widely used as catalysts in environmental chemistry that deal with the conversion of carbon monoxide and hydrocarbons. These oxide catalysts possess both high thermal stability and activity and are useful in the combustion of fuels in automobiles and in power plants.
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www.science24.com/paper/7226
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Lanthanum is one of the rare earth elements used to make carbon arc lights which are used in the motion picture industry for studio lighting and projector lights. Lanthanum also makes up about 25% of Misch metal, a material that is used to make flints for lighters.
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education.jlab.org/itselemental/ele057.html
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