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Lanthanum, 57 La Ki-pún sèng-chit Miâ, hû-hō lanthanum, La Gōa-hêng silvery white Lanthanum tī chiu-kî-piáu lāi ê ūi-tì
Goân-chú-hoan 57 Goân-chú-liōng (±) 138.90547(7)[ 1] Goân-sò͘ lūi-pia̍t lanthanum-hē sometimes considered a transition metal Cho̍k , hun-khu n/a , f khu Chiu-kî tē 6 chiu-kî Tiān-chú pâi-lia̍t [Xe ] 5d1 6s2 per shell 2, 8, 18, 18, 9, 2 Bu̍t-lí sèng-chit Siòng kò͘-thé Iûⁿ-tiám 1193 K (920 °C, 1688 °F) Hut-tiám 3737 K (3464 °C, 6267 °F) Bi̍t-tō͘ (sek-un ) 6.162 g·cm−3 5.94 g·cm−3 Iûⁿ-hoà-jia̍t 6.20 kJ·mol−1 Cheng-hoat-jia̍t 400 kJ·mol−1 Jia̍t-iông-liōng 27.11 J·mol−1 ·K−1 cheng-khì-ap (extrapolated)
P (Pa)
1
10
100
1 k
10 k
100 k
tī T (K)
2005
2208
2458
2772
3178
3726
Goân-chú sèng-chit Sng-hòa-sò͘ 3 , 2, 1 (a strongly basic oxide)Tiān-hū-tō͘ Pauling scale: 1.10 Tiān-lī-lêng 1st: 538.1 kJ·mol−1 2nd: 1067 kJ·mol−1 3rd: 1850.3 kJ·mol−1 Goân-chú pòaⁿ-kèng empirical: 187 pm Kiōng-kè pòaⁿ-kèng 207±8 pm Cha̍p-lio̍k Chiⁿ-thé kò͘-chō double hexagonal close-packed (dhcp) Siaⁿ-sok (sòe kùn-á) 2475 m·s−1 (at 20 °C) Jia̍t-phòng-tiòng α, poly: 12.1 µm·m−1 ·K−1 (at r.t. ) Jia̍t-thoân-tō-lu̍t 13.4 W·m−1 ·K−1 Tiān-chó͘-lu̍t α, poly: 615 nΩ·m (at r.t. ) Chû-sèng paramagnetic [ 2] Young hē-sò͘ α form: 36.6 GPa Shear hē-sò͘ α form: 14.3 GPa Bulk hē-sò͘ α form: 27.9 GPa Poisson pí α form: 0.280 Mohs ngē-tō͘ 2.5 Vickers ngē-tō͘ 360–1750 MPa Brinell ngē-tō͘ 350–400 MPa CAS teng-kì pian-hō 7439-91-0 Le̍k-sú Hoat-hiān Carl Gustaf Mosander (1838) Chòe ún-tēng ê tông-ūi-sò͘ Chú bûn-chiong: lanthanum ê tông-ūi-sò͘
Decay modes in parentheses are predicted, but have not yet been observed
Lanthanum sī 1 ê hoà-ha̍k goân-sò͘ . I ê goân-chú-hoan sī 57, hoà-ha̍k hû-hō sī La.