టెర్బియం, 00 Tb Pronunciation (TUR-bee -əm Appearance silvery white
Group మూస:Infobox element/symbol-to-group/format Period period 6 Block f-block Electron configuration [Xe ] 4f9 6s2 Electrons per shell 2, 8, 18, 27, 8, 2 Phase at STP solid Melting point 1629 K (1356 °C, 2473 °F) Boiling point 3503 K (3230 °C, 5846 °F) Density (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 vaporization 293 kJ/mol Molar heat capacity 28.91 J/(mol·K) Vapor pressure
P (Pa)
1
10
100
1 k
10 k
100 k
at T (K)
1789
1979
(2201)
(2505)
(2913)
(3491)
Oxidation state s0,[ 3] [ 4] +3 basic oxide) Electronegativity Pauling scale: ? 1.2 Atomic radius empirical: 177 pm Covalent radius 194±5 pm Spectral line s of టెర్బియంNatural occurrence primordial Crystal structure hexagonal close-packed (hcp) 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 Discovery Carl Gustaf Mosander (1842) First isolation Carl Gustaf Mosander (1842) Template:infobox టెర్బియం isotopes does not exist Category: టెర్బియం references
References
These references will appear in the article, but this list appears only on this page.
↑ "Standard Atomic Weights: Terbium" . CIAAW . 2021.↑ Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; et al. (2022-05-04). "Standard atomic weights of the elements 2021 (IUPAC Technical Report)" . Pure and Applied Chemistry (in ఇంగ్లీష్). doi :10.1515/pac-2019-0603 . ISSN 1365-3075 . ↑ Yttrium and all lanthanides except Ce and Pm 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 . Arnold, Polly L.; Petrukhina, Marina A.; Bochenkov, Vladimir E.; Shabatina, Tatyana I.; Zagorskii, Vyacheslav V.; Cloke (2003-12-15). "Arene complexation of Sm, Eu, Tm and Yb atoms: a variable temperature spectroscopic investigation". Journal of Organometallic Chemistry . 688 (1–2): 49–55. doi :10.1016/j.jorganchem.2003.08.028 .
↑ La(I), Pr(I), Tb(I), Tm(I), and Yb(I) have been observed in MB8 − clusters; see Li, Wan-Lu; Chen, Teng-Teng; Chen, Wei-Jia; Li, Jun; Wang, Lai-Sheng (2021). "Monovalent lanthanide(I) in borozene complexes" . Nature Communications . 12 (1): 6467. doi :10.1038/s41467-021-26785-9 . PMC 8578558 PMID 34753931 .
