| Eegenskapen |
|---|
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| 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 | 538,1kJ/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 | 1193K (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 | 13W/(m · K) |
| Cheemisk[2] |
|---|
| Oksidatsionstustant | 3 |
| Oksiiden | La2O3 |
| Sür ofbaasisk | swaak baasisk |
| Normoolpotentiaal | −2,38V (La3+ + 3 e− → La) |
| Elektronegatiwiteet | 1,1 (Pauling-Skala) |
| Isotoopen |
|---|
| Isotoop | NH | t1/2 | Aktiwiteet | Energii (MeV) | Produkt |
|---|
| 135La | {syn.} | 19,5h | ε | 1,200 | 135Ba | | 136La | {syn.} | 9,87min | ε | 2,870 | 136Ba | | 137La | {syn.} | 60.000a | ε | 0,600 | 137Ba | | 138La | 0,09 % | 1,05 · 1011a | ε | 1,737 | 138Ba | | β− | 1,044 | 138Ce | | 139La | 99,91 % | stabiil | | 140La | {syn.} | 1,6731d | β− | 3,762 | 140Ce | | 141La | {syn.} | 3,92h | β− | 2,502 | 141Ce |
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| Muar isotoopen biList faan isotoopen |
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| NMR-Eegenskapen |
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| Seekerhaid |
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| Miast wurdSI-ianhaiden brükt. |
