Samarium

Samarium,  ₆₂Sm

ngoi-kôn
silvery white
Kî-pún sin-sit
Miàng, fù-ho	samarium, Sm
thùng-su-thí	α form
ngoi-hìn	silvery white
Samarium chhai chû-khì-péu ke vi-chi
– ↑ Sm ↓ Pu promethium ← samarium → europium
ngièn-chṳ́ sì-sú	62
ngièn-chṳ́-liòng (±)	150.36(2)
ngièn-su lui-phe̍t	lanthanum-hi
Chhu̍k, fûn-khî	n/a, f-block
chû-khì	period 6
thien-chṳ́ phài-lie̍t	[Xe] 4f6 6s2
per shell	2, 8, 18, 24, 8, 2
vu̍t-lî sin-chṳt
Siông	ku-thí
yùng-tiám	1345 K ​(1072 °C, ​1962 °F)
pui-tiám	2173 K ​(1900 °C, ​3452 °F)
Me̍t-thu near Sit-vûn	7.52 g·cm−3
7.16 g·cm−3
Yùng-fa-ngie̍t	8.62 kJ·mol−1
Chîn-fat-ngie̍t	192 kJ·mol−1
Ngie̍t-yùng-liong	29.54 J·mol−1·K−1
chîn-hi-ap P (Pa) 1 10 100 1 k 10 k 100 k chhai T (K) 1001 1106 1240 (1421) (1675) (2061)
Ngièn-chṳ́ sin-chṳt
Yông-fa-su	4, 3, 2, 1 ​(a mildly basic oxide)
Thien-fu-sin	Pauling scale: 1.17
Thien-lì-nèn	1st: 544.5 kJ·mol−1 2nd: 1070 kJ·mol−1 3rd: 2260 kJ·mol−1
Ngièn-chṳ́ pan-kang	empirical: 180 pm
Khiung-ka pan-kang	198±8 pm
Miscellanea
Chîn-thí keu-chho	​rhombohedral
Sâng-suk thin rod	2130 m·s−1 (at 20 °C)
Ngie̍t-phàng-chong	(r.t.) (α, poly) 12.7 µm·m−1·K−1
Ngie̍t-chhòn-thô-li̍t	13.3 W·m−1·K−1
Thien-chú-li̍t	(r.t.) (α, poly) 0.940 µΩ·m
Chhṳ̀-sin	paramagnetic
Young's modulus	α form: 49.7 GPa
Shear modulus	α form: 19.5 GPa
Bulk modulus	α form: 37.8 GPa
Poisson ratio	α form: 0.274
Vickers hardness	410–440 MPa
Brinell hardness	440–600 MPa
CAS Registry Number	7440-19-9
Le̍k-sú
Hí-miàng	after the mineral samarskite (itself named after Vasili Samarsky-Bykhovets)
Hoat-kiàn kap siōng chá ê tông-ūi-sò͘	Lecoq de Boisbaudran (1879)
Chui vún-thin ke thùng-vi-su
Chú vùn-chông: samarium ke thùng-vi-su
iso NA half-life DM DE (MeV) DP 145Sm syn 340 d ε – 145Pm 146Sm trace 1.03×108 y α 2.529 142Nd 147Sm 14.99% 1.06×1011 y α 2.310 143Nd 148Sm 11.24% 7×1015 y α 1.986 144Nd 149Sm 13.82% >2×1015 y (α) 1.870 145Nd 150Sm 7.38% – (α) 1.4495 146Nd 151Sm syn 90 y β− – 151Eu 152Sm 26.75% – (α) 0.2203 148Nd 153Sm syn 46.284 h β− – 153Eu 154Sm 22.75% >2.3×1018 y (β−β−) 1.2510 154Gd
Decay modes in parentheses are predicted, but have not yet been observed

Samarium he yit-chúng fa-ho̍k ngièn-su, fa-ho̍k fù-ho vì Sm, ngièn-chṳ́ su-muk he 62.