Terbium

Terbium, ₆₅Tb
Terbium
Pípè	/ˈtɜːrbiəm/ (TUR-bee-əm)
Ìhànsójú	silvery white
Ìwúwo átọ̀mù Ar, std(Tb)	158.925354(8)
Terbium ní orí tábìlì àyè
	gadolinium ← terbium → dysprosium
Nọ́mbà átọ̀mù (Z)	65
Ẹgbẹ́	group n/a
Àyè	àyè 6
Àdìpọ̀	Àdìpọ̀-f
Ẹ̀ka ẹ́límẹ́ntì	Lanthanide
Ìtò ẹ̀lẹ́ktrọ́nù	[Xe] 4f9 6s2
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan	2, 8, 18, 27, 8, 2
Àwọn ohun ìní ara
Ìfarahàn at STP	solid
Ìgbà ìyọ́	1629 K (1356 °C, 2473 °F)
Ígbà ìhó	3503 K (3230 °C, 5846 °F)
Kíki (near r.t.)	8.23 g/cm3
when liquid (at m.p.)	7.65 g/cm3
Heat of fusion	10.15 kJ/mol
Heat of	293 kJ/mol
Molar heat capacity	28.91 J/(mol·K)
Atomic properties
Oxidation states	0, +1, +2, +3, +4 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment
Electronegativity	Pauling scale: ? 1.2
Atomic radius	empirical: 177 pm
Covalent radius	194±5 pm
	Color lines in a spectral rangeSpectral lines of terbium
Other properties
Natural occurrence	primordial
Crystal structure	hexagonal
Speed of sound thin rod	2620 m/s (at 20 °C)
Thermal expansion	(r.t.) (α, poly) 10.3 µm/(m·K)
Thermal conductivity	11.1 W/(m·K)
Electrical resistivity	(r.t.) (α, poly) 1.150 µ Ω·m
Magnetic ordering	paramagnetic at 300 K
Young's modulus	(α form) 55.7 GPa
Shear modulus	(α form) 22.1 GPa
Bulk modulus	(α form) 38.7 GPa
Poisson ratio	(α form) 0.261
Vickers hardness	863 MPa
Brinell hardness	677 MPa
CAS Number	7440-27-9
Main isotopes of terbium
	Àdàkọ:Category-inline; wo; ọ̀rọ̀; àtúnṣe; \| references

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Itokasi

↑ Meija, Juris; Coplen, Tyler B.; Berglund, Michael; Brand, Willi A.; De Bièvre, Paul; Gröning, Manfred; Holden, Norman E.; Irrgeher, Johanna et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry 88 (3): 265–91. doi:10.1515/pac-2015-0305.
↑ Yttrium and all lanthanides except Ce, Pm, Eu, Tm, Yb have been observed in the oxidation state 0 in bis(1,3,5-tri-t-butylbenzene) complexes, see Cloke, F. Geoffrey N. (1993). "Zero Oxidation State Compounds of Scandium, Yttrium, and the Lanthanides". Chem. Soc. Rev. 22: 17–24. doi:10.1039/CS9932200017.