Europium

Europium,  ₆₃Eu

Ki-pún sèng-chit
Miâ, hû-hō	europium, Eu
Gōa-hêng	silvery white, with a pale yellow tint; but rarely seen without oxide discoloration
Europium tī chiu-kî-piáu lāi ê ūi-tì
– ↑ Eu ↓ Am samarium ← europium → gadolinium
Goân-chú-hoan	63
Goân-chú-liōng (±)	151.964(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] 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
Tiān-lī-lêng	1st: 547.1 kJ·mol−1 2nd: 1085 kJ·mol−1 3rd: 2404 kJ·mol−1
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
Tiān-chó͘-lu̍t	poly: 0.900 µΩ·m (at r.t.)
Chû-sèng	paramagnetic
Young hē-sò͘	18.2 GPa
Shear hē-sò͘	7.9 GPa
Bulk hē-sò͘	8.3 GPa
Poisson pí	0.152
Vickers ngē-tō͘	165–200 MPa
CAS teng-kì pian-hō	7440-53-1
Le̍k-sú
Hō-miâ	after Europe
Hoat-hiān kap siōng chá ê tông-ūi-sò͘	Eugène-Anatole Demarçay (1896, 1901)
Chòe ún-tēng ê tông-ūi-sò͘
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.