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Lantaan

Faan Wikipedia
Tekst üüb Öömrang
Eegenskapen
Algemian
Nööm, Symbool, Numer Lantaan, La, 57
Seerie Auergungsmetal
Skööl, Periode, Blook 3, 6, d
Klöör, Skak salwern witj
CAS-Numer 7439-91-0
Uundial 17 ppm[1]
Atomaar [2]
Atoommase 138,90547(7)[3] u
Atoomraadius (bereegent) 195 () pm
Kovalent-Raadius 207 pm
Elektroonen [Xe] 5d1 6s2
1. Ionisiarang 538,1 kJ/mol
2. Ionisiarang 1067 kJ/mol
3. Ionisiarang 1850,3 kJ/mol
Füsikaalisk [2]
Tustant fääst
Feranrangen 3
Kristal hexagonaal
Sachthaid 6,17 g/cm3 (20 °C)[4]
Hardhaid 2,5
Magnetismus paramagneetisk (Χm = 5,4 · 10−5)[5]
Smoltponkt 1193 K (920 °C)
Köögponkt 3743 K[6] K (3470 °C)
Molaar Rüm 22,39 · 10−6 m3/mol
Dampwaremk 400 kJ/mol[6] kJ/mol
Smoltwaremk 6,2 kJ/mol
Faard faan a tuun 2475 m/s
Elektrisk struumfeerang 1,626 · 106 A/(V · m)
Waremkfeerang 13 W/(m · K)
Cheemisk [2]
Oksidatsionstustant 3
Oksiiden La2O3
Sür of baasisk swaak baasisk
Normoolpotentiaal −2,38 V (La3+ + 3 e → La)
Elektronegatiwiteet 1,1 (Pauling-Skala)
Isotoopen
Isotoop NH t1/2 Aktiwiteet Energii (MeV) Produkt
135La

{syn.}

19,5 h ε 1,200 135Ba
136La

{syn.}

9,87 min ε 2,870 136Ba
137La

{syn.}

60.000 a ε 0,600 137Ba
138La

0,09 %

1,05 · 1011 a ε 1,737 138Ba
β 1,044 138Ce
139La

99,91 %

stabiil
140La

{syn.}

1,6731 d β 3,762 140Ce
141La

{syn.}

3,92 h β 2,502 141Ce
Muar isotoopen bi List faan isotoopen
NMR-Eegenskapen
  Spin (I) γ uun
rad·T−1·s−1
Er(1H) fL bi
B = 4,7 T
uun MHz
138La 5 3,557 · 107 0,00008 13,19
139La 7/2 3,808 · 107 0,0605 14,13
Seekerhaid
GHS-Kääntiaken [7]

Polwer

02 – Braant fiks gau

Gefoor

H- an P-wäärnang H: 260
EUH: 014
P: 223-​231+232-​370+378-​422 [7]
EU-Gefoorentiaken
ei bekäänd
ei bekäänd
R- an S-wäärnang R: ?
S: ?
Miast wurd SI-ianhaiden brükt.

Lantaan as en cheemisk element mä det ufkörtang La an det atoomnumer 57. Hat as en auergungsmetal.

Elementen mä atoomtaalen faan 57 bit 71 san Lantanoiden (iar: Lantaniiden).

Luke uk diar

[Bewerke | Kweltekst bewerke]
Commons Commonskategorii: Lantaan – Saamlang faan bilen of filmer
  1. Harry H. Binder: Lexikon der chemischen Elemente. S. Hirzel Verlag, Stuttgart 1999, ISBN 3-7776-0736-3.
  2. A taalen uun't infobox kem miast faan www.webelements.com (Lanthan).
  3. CIAAW, Standard Atomic Weights Revised 2013.
  4. N. N. Greenwood, A. Earnshaw: Chemie der Elemente. 1. aplaag. VCH, Weinheim 1988, ISBN 3-527-26169-9, S. 1219.
  5. Robert C. Weast (Hrsg.): CRC Handbook of Chemistry and Physics. CRC (Chemical Rubber Publishing Company), Boca Raton 1990, ISBN 0-8493-0470-9, S. E-129 bit E-145.
  6. 6,0 6,1 Yiming Zhang, Julian R. G. Evans, Shoufeng Yang: Corrected Values for Boiling Points and Enthalpies of Vaporization of Elements in Handbooks. Uun: Journal of Chemical & Engineering Data. 56, 2011, S. 328–337, doi:10.1021/je1011086.
  7. 7,0 7,1 Iindraanj tu Lanthan uun't GESTIS-dootenbeenk faan't IFA, ufrepen di 30. April 2017 (mä JavaScript).
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