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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
    Lanthanum usually occurs together with cerium and the other rare-earth elements Lanthanum was first found by the Swedish chemist Carl Gustaf Mosander in 1839 as an impurity in cerium nitrate – hence the name lanthanum, from the ancient Greek λανθάνειν (lanthanein), meaning 'to lie hidden'
  • Lanthanum carbonate Uses, Side Effects Warnings
    Lanthanum carbonate is used to lower phosphate levels in patients with end stage kidney disease High levels of phosphate can make it hard for your body to absorb calcium, which can cause serious medical problems
  • 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 | 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: Element Properties and Uses - samaterials. com
    Lanthanum is a rare earth element with unique chemical and physical properties It is primarily used in applications such as carbon arc lamps, catalysts, optical glass, and batteries
  • 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]
  • What Is Lanthanum? Uses, Price Supply Chain
    Lanthanum is a soft, malleable metal that oxidises rapidly in air and reacts slowly with water It sits at the head of the lanthanide series and is classified as a light rare earth element (LREE), grouped with cerium, praseodymium, neodymium, samarium, and europium
  • Lanthanum - an overview | ScienceDirect Topics
    Lanthanum (La) is a nonessential element In its pure form, it is a rather soft, silvery-white metal, which tarnishes rapidly in air Its atomic weight is 138 9055 and its atomic number is 57
  • Lanthanum | La | CID 23926 - PubChem
    Lanthanum is a silvery white metallic element that belongs to period 6 of the lanthanoids family, with phosphate binding property Lanthanum, when administered in a salt form, dissociates in acid to release lanthanum ions, which then bind dietary phosphate
  • Lanthanum Element Facts Chemistry - chemicool. com
    Lanthanum is a silvery-white soft metal, which can be cut with a knife It is ductile, malleable and exposed surfaces tarnish rapidly in air forming the oxide Lanthanum reacts with water to form lanthanum hydroxide plus hydrogen gas





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