Lanthanum (Hon-ngî : 鑭 lán ) he yit-chúng fa-ho̍k ngièn-su , fa-ho̍k fù-ho vì La , ngièn-chṳ́ su-muk he 57 .
Lanthanum, 57 La 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