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Ytterbium, 70 Yb Ytterbium Pípè / ɪ ˈ t ɜːr b i ə m / (i-TUR -bee-əm ) Ìhànsójú silvery white Ìwúwo átọ̀mù A r, std (Yb) 173.045(10) [ 1] Ytterbium ní orí tábìlì àyè
Nọ́mbà átọ̀mù (Z ) 70 Ẹgbẹ́ group n/a Àyè àyè 6 Àdìpọ̀ Àdìpọ̀-f Ẹ̀ka ẹ́límẹ́ntì Lanthanide Ìtò ẹ̀lẹ́ktrọ́nù [Xe ] 4f14 6s2 Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan 2, 8, 18, 32, 8, 2 Àwọn ohun ìní ara Ìfarahàn at STP solid Ìgbà ìyọ́ 1097 K (824 °C, 1515 °F) Ígbà ìhó 1469 K (1196 °C, 2185 °F) Kíki (near r.t. ) 6.90 g/cm3 when liquid (at m.p. ) 6.21 g/cm3 Heat of fusion 7.66 kJ/mol Heat of 159 kJ/mol Molar heat capacity 26.74 J/(mol·K) pressure
P (Pa)
1
10
100
1 k
10 k
100 k
at T (K)
736
813
910
1047
(1266)
(1465)
Atomic properties Oxidation states +1, +2, +3 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment Electronegativity Pauling scale: ? 1.1 Atomic radius empirical: 176 pm Covalent radius 187±8 pm Color lines in a spectral range Spectral lines of ytterbiumOther properties Natural occurrence primordial Crystal structure (fcc) Speed of sound thin rod 1590 m/s (at 20 °C) Thermal expansion (r.t. ) (β, poly) 26.3 µm/(m·K) Thermal conductivity 38.5 W/(m·K) Electrical resistivity (r.t. ) (β, poly) 0.250 µ Ω·m Magnetic ordering paramagnetic [ 2] Young's modulus (β form) 23.9 GPa Shear modulus (β form) 9.9 GPa Bulk modulus (β form) 30.5 GPa Poisson ratio (β form) 0.207 Vickers hardness 206 MPa Brinell hardness 343 MPa CAS Number 7440-64-4 Main isotopes of ytterbium
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References
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↑ 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 .
↑ M. Jackson "Magnetism of Rare Earth" The IRM quaterly col. 10, No. 3, p. 1, 2000