Lanthani
| Lanthani (Lanthanum) | |
|---|---|
 | |
| Jina la Elementi | Lanthani (Lanthanum) |
| Alama | La |
| Namba atomia | 57 |
| Uzani atomia | 138.905 |
| Valensi | 2, 8, 18, 18, 9, 2 |
| Densiti | 6.126 g/cm3 |
| Ugumu (Mohs) | 2.5 |
| Kiwango cha kuyeyuka | 1193 K (920 °C) |
| Kiwango cha kuchemka | 3737 K (3464 °C) |
| Asilimia zaganda la dunia | 17 ppm |
| Hali maada | mango |
Lanthaninielementi ya kikemiayenyealamayaLa.Namba atomiani 57. Ni sehemu yakundilaelementizaLanthanidiikihesabiwa kati yaardhi adimu.Rangiyake nikidhahabu-nyeupe,lakinihewaniinapata harakagandalaoksidilenye rangi yakijivu.Ni laini na inaweza kukatwa kwakisu.
Jinalinatokana naKigirikiλανθάνεινlanthanein(kuficha) kwa sababuwanakemiawalioitambua katikakarne ya 19walionaugumukuitenganisha namadinimengine.
Kuna matumizi ya lanthani katikateknolojiambalimbali:
- "jiwe la kiberiti" huwa naasilimia25-45 za lanthani
- wakala nakisishi (kiungo cha kuondoshaoksijeni) katikauzalishajiwaaloizametali
- inaungwa katikachumaili kuongezaufulikivu uzi
- oksidi ya lanthani huungwa katikakioochalenzizakamera
- lanthani hutumiwa katikabeterizamagariyaumemeaina ya NiMH;[1]
Marejeo
[hariri|hariri chanzo]- ↑As hybrid cars gobble rare metals, shortage looms,tovuti ya Reuters, August 31, 2009
Viungo vya nje
[hariri|hariri chanzo]- The Industrial Chemistry of the Lanthanons, Yttrium, Thorium and Uranium,by R. J. Callow, Pergamon Press, 1967
- Extractive Metallurgy of Rare Earths,by C. K. Gupta and N. Krishnamurthy, CRC Press, 2005
- Nouveau Traite de Chimie Minerale, Vol. VII. Scandium, Yttrium, Elements des Terres Rares, Actinium,P. Pascal, Editor, Masson & Cie, 1959
- Chemistry of the Lanthanons,by R. C. Vickery, Butterworths 1953
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