Template:Infobox terbium

Terbium, ₆₅Tb

Terbium
Pronunciation	/ˈtɜːrbiəm/ ​(TUR-bee-əm)
Appearance	silvery white
Standard atomic weight Ar, std(Tb)	7002158925354000000♠158.925354(8)
Terbium in the periodic cairt
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 Airn Cobalt Nickel Capper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Siller (element) 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 Gowd Mercur (element) Thallium Leid (element) 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 Ununtrium Flerovium Ununpentium Livermorium Ununseptium Ununoctium - ↑ Tb ↓ Bk gadolinium ← terbium → dysprosium
Atomic nummer (Z)	65
Group	group n/a
Period	period 6
Block	f-block
Element category	Lanthanide
Electron confeeguration	[Xe] 4f9 6s2
Electrons per shell	2, 8, 18, 27, 8, 2
Pheesical properties
Phase at STP	solit
Meltin pynt	1629 K ​(1356 °C, ​2473 °F)
Bylin pynt	3503 K ​(3230 °C, ​5846 °F)
Density (near r.t.)	8.23 g/cm3
when liquid (at m.p.)	7.65 g/cm3
Heat o fusion	10.15 kJ/mol
Heat o vapourisation	293 kJ/mol
Molar heat capacity	28.91 J/(mol·K)
Vapour pressur 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 waikly basic
Electronegativity	Pauling scale: ? 1.2
Atomic radius	empirical: 177 pm
Covalent radius	194±5 pm
Colour lines in a spectral range Spectral lines o terbium
Ither properties
Naitural occurrence	primordial
Creestal structur	​hexagonal close-packed (hcp)
Speed o soond 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 orderin	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 haurdness	863 MPa
Brinell haurdness	677 MPa
CAS Nummer	7440-27-9
History
Diskivery	Carl Gustaf Mosander (1842)
First isolation	Carl Gustaf Mosander (1842)
Main isotopes o terbium
Iso­tope Abun­dance Hauf-life (t1/2) Decay mode Pro­duct 157Tb syn 71 y ε 157Gd 158Tb syn 180 y ε 158Gd β− 158Dy 159Tb 100% - (SF)
Decay modes in parentheses are predictit, but hae nae yet been observed

style="text-align:left"| data m.p. cat
	in	calc from C	diff	report	ref
C	1356	—	—
K	1629	1629	0
F	2473	2473	0
WD	!
input	C: 1356, K: 1629, F: 2473
comment

style="text-align:left"| data b.p. cat
	in	calc from C	diff	report	ref
C	3230	—	—
K	3503	3500	3
F	5846	5850	-4
WD	!
input	C: 3230, K: 3503, F: 5846
comment

References

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