Template:Infobox terbium

Terbium, ₆₅Tb

Terbium
Pronunciation	/ˈtɜːrbiəm/ ​(TUR-bee-əm)
Appearance	silvery white
Standard atomic weight Ar, std(Tb)	158.925354(8)
Terbium in the periodic table
Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson – ↑ Tb ↓ Bk gadolinium ← terbium → dysprosium
Atomic number (Z)	65
Group	group n/a
Period	period 6
Block	f-block
Element category	f-block
Electron configuration	[Xe] 4f9 6s2
Electrons per shell	2, 8, 18, 27, 8, 2
Physical properties
Phase at STP	solid
Melting point	1629 K ​(1356 °C, ​2473 °F)
Boiling point	3396 K ​(3123 °C, ​5653 °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	391 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)
Atomic properties
Oxidation states	0, +1, +2, +3, +4 (a weakly basic oxide)
Electronegativity	Pauling scale: 1.2 (?)
Ionization energies	1st: 565.8 kJ/mol 2nd: 1110 kJ/mol 3rd: 2114 kJ/mol
Atomic radius	empirical: 177 pm
Covalent radius	194±5 pm
Spectral lines of terbium
Other properties
Natural occurrence	primordial
Crystal structure	​hexagonal close-packed (hcp)
Speed of sound thin rod	2620 m/s (at 20 °C)
Thermal expansion	at r.t. α, poly: 10.3 µm/(m·K)
Thermal conductivity	11.1 W/(m·K)
Electrical resistivity	α, poly: 1.150 µΩ·m (at r.t.)
Magnetic ordering	paramagnetic at 300 K
Magnetic susceptibility	+146,000·10−6 cm3/mol (273 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	450–865 MPa
Brinell hardness	675–1200 MPa
CAS Number	7440-27-9
History
Naming	after Ytterby (Sweden), where it was mined
Discovery and first isolation	Carl Gustaf Mosander (1843)
Main isotopes of terbium
Iso­tope Abun­dance Physics:Half-life (t1/2) Decay mode Pro­duct 157Tb syn 71 y ε 157Gd 158Tb syn 180 y ε 158Gd β− 158Dy 159Tb 100% stable

Tb data m.p. cat
	in	calc from C	diff	report	ref
C	1356	—	—
K	1629	1629	0
F	2473	2473	0
max precision	0
WD
input	C: 1356, K: 1629, F: 2473
comment

Tb data b.p. cat
	in	calc from C	diff	report	ref
C	3123	—	—
K	3396	3396	0
F	5653	5653	0
max precision	0
WD
input	C: 3123, K: 3396, F: 5653
comment

PTChemistry:terbium

Gd ← i'box Gd	iso65Tb  infobox  isobox	→ Dy i'box Dy
Commons  Wikidata:Q1838  Wiktionary Indexes in PT: § below · Page

[]  Data sets read by {{Infobox element}}
Name and identifiers
Top image (caption, alt)
Pronunciation
Category (enwiki)
Standard atomic weight
most stable isotope
Natural occurrence
Phase at STP
Chemistry:Oxidation states
Spectral lines image
Physics:Electron configuration (cmt, ref)
Term symbol * (cmt, ref)
Wikidata *
* Not used in {{Infobox element}} (2019-02-03) See also {{Infobox element/symbol-to--navbox}}

References

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