Europium (Hon-ngî: 銪 yǒu) he yit-chúng fa-ho̍k ngièn-su, fa-ho̍k fù-ho vì Eu, ngièn-chṳ́ su-muk he 63.
Europium, 63Eungoi-kôn |
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silvery white, with a pale yellow tint;[1] but rarely seen without oxide discoloration
![](http://178.128.105.246/host-http-upload.wikimedia.org/wikipedia/commons/thumb/6/6a/Europium.jpg/250px-Europium.jpg) |
Kî-pún sin-sit |
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Miàng, fù-ho |
Europium, Eu |
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ngoi-hìn |
silvery white, with a pale yellow tint;[1] but rarely seen without oxide discoloration |
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Europium chhai chû-khì-péu ke vi-chi |
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|
ngièn-chṳ́ sì-sú |
63 |
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ngièn-chṳ́-liòng (±) |
151.964(1)[2] |
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ngièn-su lui-phe̍t |
lanthanum-hi |
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Chhu̍k, fûn-khî |
n/a, f-block |
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chû-khì |
period 6 |
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thien-chṳ́ phài-lie̍t |
[Xe] 4f7 6s2 |
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per shell |
2, 8, 18, 25, 8, 2 |
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vu̍t-lî sin-chṳt |
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Siông |
ku-thí |
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yùng-tiám |
1099 K (826 °C, 1519 °F) |
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pui-tiám |
1802 K (1529 °C, 2784 °F) |
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Me̍t-thu near Sit-vûn |
5.264 g·cm−3 |
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5.13 g·cm−3 |
Yùng-fa-ngie̍t |
9.21 kJ·mol−1 |
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Chîn-fat-ngie̍t |
176 kJ·mol−1 |
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Ngie̍t-yùng-liong |
27.66 J·mol−1·K−1 |
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chîn-hi-ap
P (Pa)
|
1
|
10
|
100
|
1 k
|
10 k
|
100 k
|
chhai T (K)
|
863
|
957
|
1072
|
1234
|
1452
|
1796
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Ngièn-chṳ́ sin-chṳt |
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Yông-fa-su |
3, 2, 1 (a mildly basic oxide) |
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Thien-fu-sin |
Pauling scale: 1.2 |
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Thien-lì-nèn |
1st: 547.1 kJ·mol−1 2nd: 1085 kJ·mol−1 3rd: 2404 kJ·mol−1 |
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Ngièn-chṳ́ pan-kang |
empirical: 180 pm |
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Khiung-ka pan-kang |
198±6 pm |
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Miscellanea |
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Chîn-thí keu-chho |
body-centered cubic (bcc) |
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Ngie̍t-phàng-chong |
poly: 35.0 µm·m−1·K−1 (at r.t.) |
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Ngie̍t-chhòn-thô-li̍t |
est. 13.9 W·m−1·K−1 |
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Thien-chú-li̍t |
poly: 0.900 µΩ·m (at r.t.) |
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Chhṳ̀-sin |
paramagnetic[3] |
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Young's modulus |
18.2 GPa |
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Shear modulus |
7.9 GPa |
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Bulk modulus |
8.3 GPa |
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Poisson ratio |
0.152 |
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Vickers hardness |
165–200 MPa |
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CAS Registry Number |
7440-53-1 |
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Le̍k-sú |
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Hí-miàng |
after Europe |
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Hoat-kiàn kap siōng chá ê tông-ūi-sò͘ |
Eugène-Anatole Demarçay (1896, 1901) |
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Chui vún-thin ke thùng-vi-su |
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Chú vùn-chông: Europium ke thùng-vi-su |
iso
|
NA
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half-life
|
DM
|
DE (MeV)
|
DP
|
150Eu
|
syn
|
36.9 y
|
ε
|
2.261
|
150Sm
|
151Eu
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47.8%
|
5×1018 y
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α
|
1.9644
|
147Pm
|
152Eu
|
syn
|
13.54 y
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ε
|
1.874
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152Sm
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β−
|
1.819
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152Gd
|
153Eu
|
52.2%
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–
|
(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 |