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lanthanum    音标拼音: [l'ænθənəm]
n. 镧

镧

lanthanum
n 1: a white soft metallic element that tarnishes readily;
occurs in rare earth minerals and is usually classified as
a rare earth [synonym: {lanthanum}, {La}, {atomic number 57}]

Lanthanum \Lan"tha*num\ (l[a^]n"th[.a]*n[u^]m), n. [NL., fr. Gr.
lanqa`nein to lie hid, to be concealed.] (Chem.)
A rare element of the rare earth group of the metals, of
atomic number 57, allied to aluminum. It occurs in certain
rare minerals, as cerite, gadolinite, orthite, etc., and was
so named from the difficulty of separating it from cerium,
didymium, and other rare earth elements with which it is
usually associated. Atomic weight 138.9. Symbol La. [Formerly
written also {lanthanium}.]
[1913 Webster]


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  • Lanthanum - Wikipedia
    It is a soft, ductile, silvery-white metal that tarnishes slowly when exposed to air It is the first and the prototype of the lanthanide series, a group of 15 similar elements between lanthanum and lutetium in the periodic table Lanthanum is traditionally counted among the rare earth elements
  • Lanthanum | Rare Earth Element, Uses in Technology, Medicine | Britannica
    lanthanum (La), chemical element, a rare-earth metal of Group 3 of the periodic table, that is the prototype of the lanthanide series of elements Lanthanum is a ductile and malleable silvery white metal that is soft enough to be cut with a knife
  • Lanthanum Facts, Symbol, Discovery, Properties, Uses
    Lanthanum (pronunciation: LAN-the-nem) [3] is a soft, silvery rare-earth metal belonging to the lanthanoids family and represented by the chemical symbol La [1, 2]
  • Lanthanum - Element information, properties and uses | Periodic Table
    Lanthanum is an important component of mischmetal alloy (about 20%) The best-known use for this alloy is in ‘flints’ for cigarette lighters ‘Rare earth’ compounds containing lanthanum are used extensively in carbon lighting applications, such as studio lighting and cinema projection
  • Lanthanum (La) Element: Properties, Uses, Reactions, Effects
    Lanthanum is a chemical element with the atomic number 57 and is represented by the symbol ‘La’ in the periodic table It is soft and silvery in appearance and classified as rare earth metal and belongs to the d-block of the lanthanide group of the periodic table
  • Comprehensive Guide to Lanthanum: Uses, Properties, and Applications
    Lanthanum is a chemical element with the symbol "La" and atomic number 57 It belongs to the lanthanide series and is classified as a rare-earth element Lanthanum is generally known for its use in high-tech applications like flat-panel displays and hybrid vehicle batteries
  • Lanthanum Facts – Atomic Number 57 or Symbol La
    Lanthanum is a soft, silvery-white metallic element with the symbol La and atomic number 57 It is the first element in the lanthanide series and is a rare earth element Lanthanum has significant applications in modern technology, ranging from catalysis to advanced optical materials
  • Lanthanum: Properties and Applications - Stanford Materials
    Lanthanum, a silvery-white rare earth metal, plays a crucial role in various modern technological advancements Its unique properties and applications make it indispensable in numerous industries This article delves into the properties of lanthanum and explores its diverse applications
  • A History Of Lanthanum - Brian D. Colwell
    The history of lanthanum spans nearly two centuries, beginning with its discovery in 1839 and extending through its evolution from a chemical curiosity to an essential component in modern technology
  • Lanthanum (La) - Definition, Preparation, Properties, Uses, Compounds . . .
    What is Lanthanum? Lanthanum is a chemical element with the symbol La and atomic number 57 It is a soft, ductile, silvery-white metal that tarnishes rapidly when exposed to air and is soft enough to be cut with a knife





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