ngoi-kôn |
---|
silvery white
 |
Kî-pún sin-sit |
---|
Miàng, fù-ho |
Lanthanum, La |
---|
ngoi-hìn |
silvery white |
---|
Lanthanum chhai chû-khì-péu ke vi-chi |
---|
|
ngièn-chṳ́ sì-sú |
57 |
---|
ngièn-chṳ́-liòng (±) |
138.90547(7)[1] |
---|
ngièn-su lui-phe̍t |
lanthanum-hi, sometimes considered a transition metal |
---|
Chhu̍k, fûn-khî |
n/a, f-block |
---|
chû-khì |
period 6 |
---|
thien-chṳ́ phài-lie̍t |
[Xe] 5d1 6s2 |
---|
per shell |
2, 8, 18, 18, 9, 2 |
---|
vu̍t-lî sin-chṳt |
---|
Siông |
ku-thí |
---|
yùng-tiám |
1193 K (920 °C, 1688 °F) |
---|
pui-tiám |
3737 K (3464 °C, 6267 °F) |
---|
Me̍t-thu near Sit-vûn |
6.162 g·cm−3 |
---|
5.94 g·cm−3 |
Yùng-fa-ngie̍t |
6.20 kJ·mol−1 |
---|
Chîn-fat-ngie̍t |
400 kJ·mol−1 |
---|
Ngie̍t-yùng-liong |
27.11 J·mol−1·K−1 |
---|
chîn-hi-ap (extrapolated)
P (Pa)
|
1
|
10
|
100
|
1 k
|
10 k
|
100 k
| chhai T (K)
|
2005
|
2208
|
2458
|
2772
|
3178
|
3726
|
|
Ngièn-chṳ́ sin-chṳt |
---|
Yông-fa-su |
3, 2, 1 (a strongly basic oxide) |
---|
Thien-fu-sin |
Pauling scale: 1.10 |
---|
Thien-lì-nèn |
1st: 538.1 kJ·mol−1 2nd: 1067 kJ·mol−1 3rd: 1850.3 kJ·mol−1 |
---|
Ngièn-chṳ́ pan-kang |
empirical: 187 pm |
---|
Khiung-ka pan-kang |
207±8 pm |
---|
Miscellanea |
---|
Chîn-thí keu-chho |
double hexagonal close-packed (dhcp) |
---|
Sâng-suk thin rod |
2475 m·s−1 (at 20 °C) |
---|
Ngie̍t-phàng-chong |
α, poly: 12.1 µm·m−1·K−1 (at r.t.) |
---|
Ngie̍t-chhòn-thô-li̍t |
13.4 W·m−1·K−1 |
---|
Thien-chú-li̍t |
α, poly: 615 nΩ·m (at r.t.) |
---|
Chhṳ̀-sin |
paramagnetic[2] |
---|
Young's modulus |
α form: 36.6 GPa |
---|
Shear modulus |
α form: 14.3 GPa |
---|
Bulk modulus |
α form: 27.9 GPa |
---|
Poisson ratio |
α form: 0.280 |
---|
Mohs hardness |
2.5 |
---|
Vickers hardness |
360–1750 MPa |
---|
Brinell hardness |
350–400 MPa |
---|
CAS Registry Number |
7439-91-0 |
---|
Le̍k-sú |
---|
Fat-hien |
Carl Gustaf Mosander (1838) |
---|
Chui vún-thin ke thùng-vi-su |
---|
Chú vùn-chông: Lanthanum ke thùng-vi-su |
|
Decay modes in parentheses are predicted, but have not yet been observed |