Europium
Europium, 63Eu
 |
| Ki-pún sèng-chit |
|---|
| Miâ, hû-hō |
europium, Eu |
|---|
| Gōa-hêng |
silvery white, with a pale yellow tint;[1] but rarely seen without oxide discoloration |
|---|
| Europium tī chiu-kî-piáu lāi ê ūi-tì |
|---|
|
|
| Goân-chú-hoan |
63 |
|---|
| Goân-chú-liōng (±) |
151.964(1)[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] 4f7 6s2 |
|---|
| per shell |
2, 8, 18, 25, 8, 2 |
|---|
| Bu̍t-lí sèng-chit |
|---|
| Siòng |
solid |
|---|
| Iûⁿ-tiám |
1099 K (826 °C, 1519 °F) |
|---|
| Hut-tiám |
1802 K (1529 °C, 2784 °F) |
|---|
| Bi̍t-tō͘ (sek-un) |
5.264 g·cm−3 |
|---|
|
5.13 g·cm−3 |
| Iûⁿ-hoà-jia̍t |
9.21 kJ·mol−1 |
|---|
| Cheng-hoat-jia̍t |
176 kJ·mol−1 |
|---|
| Jia̍t-iông-liōng |
27.66 J·mol−1·K−1 |
|---|
cheng-khì-ap
| P (Pa)
|
1
|
10
|
100
|
1 k
|
10 k
|
100 k
|
| tī T (K)
|
863
|
957
|
1072
|
1234
|
1452
|
1796
| |
| Goân-chú sèng-chit |
|---|
| Sng-hòa-sò͘ |
3, 2, 1 (a mildly basic oxide) |
|---|
| Tiān-hū-tō͘ |
Pauling scale: 1.2 |
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| Tiān-lī-lêng |
1st: 547.1 kJ·mol−1
2nd: 1085 kJ·mol−1
3rd: 2404 kJ·mol−1 |
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| Goân-chú pòaⁿ-kèng |
empirical: 180 pm |
|---|
| Kiōng-kè pòaⁿ-kèng |
198±6 pm |
|---|
| Cha̍p-lio̍k |
|---|
| Chiⁿ-thé kò͘-chō |
body-centered cubic (bcc) |
|---|
| Jia̍t-phòng-tiòng |
poly: 35.0 µm·m−1·K−1 (at r.t.) |
|---|
| Jia̍t-thoân-tō-lu̍t |
est. 13.9 W·m−1·K−1 |
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| Tiān-chó͘-lu̍t |
poly: 0.900 µΩ·m (at r.t.) |
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| Chû-sèng |
paramagnetic[3] |
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| Young hē-sò͘ |
18.2 GPa |
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| Shear hē-sò͘ |
7.9 GPa |
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| Bulk hē-sò͘ |
8.3 GPa |
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| Poisson pí |
0.152 |
|---|
| Vickers ngē-tō͘ |
165–200 MPa |
|---|
| CAS teng-kì pian-hō |
7440-53-1 |
|---|
| Le̍k-sú |
|---|
| Hō-miâ |
after Europe |
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| Hoat-hiān kap siōng chá ê tông-ūi-sò͘ |
Eugène-Anatole Demarçay (1896, 1901) |
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| Chòe ún-tēng ê tông-ūi-sò͘ |
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|
Chú bûn-chiong: europium ê tông-ūi-sò͘ |
| iso
|
NA
|
half-life
|
DM
|
DE (MeV)
|
DP
|
| 150Eu
|
syn
|
36.9 y
|
ε
|
2.261
|
150Sm
|
| 151Eu
|
47.8%
|
5×1018 y
|
α
|
1.9644
|
147Pm
|
| 152Eu
|
syn
|
13.54 y
|
ε
|
1.874
|
152Sm
|
| β−
|
1.819
|
152Gd
|
| 153Eu
|
52.2%
|
–
|
(α)
|
0.2736
|
149Pm
|
| 154Eu
|
syn
|
8.59 y
|
β−
|
1.969
|
154Gd
|
| 155Eu
|
syn
|
4.76 y
|
β−
|
0.253
|
155Gd
| |
|
Decay modes in parentheses are predicted, but have not yet been observed |
Europium sī 1 ê hoà-ha̍k goân-sò͘. I ê goân-chú-hoan sī 63, hoà-ha̍k hû-hō sī Eu.
Chham-khó
