Neodymium

Neodymium sī 1 ê hoà-ha̍k goân-sò͘. I ê goân-chú-hoan sī 60, hoà-ha̍k hû-hō sī Nd.

Neodymium,  ₆₀Nd

Ki-pún sèng-chit
Miâ, hû-hō	neodymium, Nd
Gōa-hêng	silvery white
Neodymium tī chiu-kî-piáu lāi ê ūi-tì
– ↑ Nd ↓ U praseodymium ← neodymium → promethium
Goân-chú-hoan	60
Goân-chú-liōng (±)	144.242(3)[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] 4f4 6s2
per shell	2, 8, 18, 22, 8, 2
Bu̍t-lí sèng-chit
Siòng	solid
Iûⁿ-tiám	1297 K ​(1024 °C, ​1875 °F)
Hut-tiám	3347 K ​(3074 °C, ​5565 °F)
Bi̍t-tō͘  (sek-un)	7.01 g·cm−3
6.89 g·cm−3
Iûⁿ-hoà-jia̍t	7.14 kJ·mol−1
Cheng-hoat-jia̍t	289 kJ·mol−1
Jia̍t-iông-liōng	27.45 J·mol−1·K−1
cheng-khì-ap P (Pa) 1 10 100 1 k 10 k 100 k tī T (K) 1595 1774 1998 (2296) (2715) (3336)
Goân-chú sèng-chit
Sng-hòa-sò͘	+4, +3, +2 ​(a mildly basic oxide)
Tiān-hū-tō͘	Pauling scale: 1.14
Tiān-lī-lêng	1st: 533.1 kJ·mol−1 2nd: 1040 kJ·mol−1 3rd: 2130 kJ·mol−1
Goân-chú pòaⁿ-kèng	empirical: 181 pm
Kiōng-kè pòaⁿ-kèng	201±6 pm
Cha̍p-lio̍k
Chiⁿ-thé kò͘-chō	​double hexagonal close-packed (dhcp)
Siaⁿ-sok (sòe kùn-á)	2330 m·s−1 (at 20 °C)
Jia̍t-phòng-tiòng	α, poly: 9.6 µm·m−1·K−1 (at r.t.)
Jia̍t-thoân-tō-lu̍t	16.5 W·m−1·K−1
Tiān-chó͘-lu̍t	α, poly: 643 nΩ·m
Chû-sèng	paramagnetic, antiferromagnetic below 20 K[2]
Young hē-sò͘	α form: 41.4 GPa
Shear hē-sò͘	α form: 16.3 GPa
Bulk hē-sò͘	α form: 31.8 GPa
Poisson pí	α form: 0.281
Vickers ngē-tō͘	345–745 MPa
Brinell ngē-tō͘	265–700 MPa
CAS teng-kì pian-hō	7440-00-8
Le̍k-sú
Hoat-hiān	Carl Auer von Welsbach (1885)
Chòe ún-tēng ê tông-ūi-sò͘
Chú bûn-chiong: neodymium ê tông-ūi-sò͘
iso NA half-life DM DE (MeV) DP 142Nd 27.2% – (SF) <53.264 143Nd 12.2% – (α) 0.5214 139Ce 144Nd 23.8% 2.29×1015 y α 1.905 140Ce 145Nd 8.3% >6×1016 y (α) 1.5784 141Ce 146Nd 17.2% – (α) 1.1822 142Ce (β−β−) 0.0702 146Sm 148Nd 5.7% >3.0×1018 y (α) 0.5986 144Ce (β−β−) 1.9288 148Sm 150Nd 5.6% 6.7×1018 y β−β− 3.367 150Sm
Decay modes in parentheses are predicted, but have not yet been observed