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Samarium, 62 Sm 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
Goân-chú-hoan 62 Goân-chú-liōng (±) 150.36(2)[ 1] 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 [ 2] 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-sò͘Lecoq 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
144 Sm
3.07%
–
(β+ β+ )
1.7811
144 Nd
(α )
0.0761
140 Nd
145 Sm
syn
340 d
ε
–
145 Pm
146 Sm
trace
1.03×108 y
α
2.529
142 Nd
147 Sm
14.99%
1.06×1011 y
α
2.310
143 Nd
148 Sm
11.24%
7×1015 y
α
1.986
144 Nd
149 Sm
13.82%
>2×1015 y
(α)
1.870
145 Nd
150 Sm
7.38%
–
(α)
1.4495
146 Nd
151 Sm
syn
90 y
β−
–
151 Eu
152 Sm
26.75%
–
(α)
0.2203
148 Nd
153 Sm
syn
46.284 h
β−
–
153 Eu
154 Sm
22.75%
>2.3×1018 y
(β− β− )
1.2510
154 Gd
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.