Samarium

Samarium,  ₆₂Sm

Ki-pún sèng-chit
Miâ, hû-hō	samarium, Sm
Tông-sò͘-thé	α form
Gōa-hêng	silvery white
Samarium tī chiu-kî-piáu lāi ê ūi-tì
– ↑ Sm ↓ Pu promethium ← samarium → europium
Goân-chú-hoan	62
Goân-chú-liōng (±)	150.36(2)
Goân-sò͘ lūi-pia̍t	lanthanum-hē
Cho̍k, hun-khu	n/a, f khu
Chiu-kî	tē 6 chiu-kî
Tiān-chú pâi-lia̍t	[Xe] 4f6 6s2
per shell	2, 8, 18, 24, 8, 2
Bu̍t-lí sèng-chit
Siòng	solid
Iûⁿ-tiám	1345 K ​(1072 °C, ​1962 °F)
Hut-tiám	2173 K ​(1900 °C, ​3452 °F)
Bi̍t-tō͘  (sek-un)	7.52 g·cm−3
7.16 g·cm−3
Iûⁿ-hoà-jia̍t	8.62 kJ·mol−1
Cheng-hoat-jia̍t	192 kJ·mol−1
Jia̍t-iông-liōng	29.54 J·mol−1·K−1
cheng-khì-ap P (Pa) 1 10 100 1 k 10 k 100 k tī T (K) 1001 1106 1240 (1421) (1675) (2061)
Goân-chú sèng-chit
Sng-hòa-sò͘	4, 3, 2, 1 ​(a mildly basic oxide)
Tiān-hū-tō͘	Pauling scale: 1.17
Tiān-lī-lêng	1st: 544.5 kJ·mol−1 2nd: 1070 kJ·mol−1 3rd: 2260 kJ·mol−1
Goân-chú pòaⁿ-kèng	empirical: 180 pm
Kiōng-kè pòaⁿ-kèng	198±8 pm
Cha̍p-lio̍k
Chiⁿ-thé kò͘-chō	​rhombohedral
Siaⁿ-sok (sòe kùn-á)	2130 m·s−1 (at 20 °C)
Jia̍t-phòng-tiòng	(r.t.) (α, poly) 12.7 µm·m−1·K−1
Jia̍t-thoân-tō-lu̍t	13.3 W·m−1·K−1
Tiān-chó͘-lu̍t	(r.t.) (α, poly) 0.940 µΩ·m
Chû-sèng	paramagnetic
Young hē-sò͘	α form: 49.7 GPa
Shear hē-sò͘	α form: 19.5 GPa
Bulk hē-sò͘	α form: 37.8 GPa
Poisson pí	α form: 0.274
Vickers ngē-tō͘	410–440 MPa
Brinell ngē-tō͘	440–600 MPa
CAS teng-kì pian-hō	7440-19-9
Le̍k-sú
Hō-miâ	after the mineral samarskite (itself named after Vasili Samarsky-Bykhovets)
Hoat-hiān kap siōng chá ê tông-ūi-sò͘	Lecoq de Boisbaudran (1879)
Chòe ún-tēng ê tông-ūi-sò͘
Chú bûn-chiong: samarium ê tông-ūi-sò͘
iso NA half-life DM DE (MeV) DP 144Sm 3.07% – (β+β+) 1.7811 144Nd (α) 0.0761 140Nd 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 sī 1 ê hoà-ha̍k goân-sò͘. I ê goân-chú-hoan sī 62, hoà-ha̍k hû-hō sī Sm.