Template:Infobox erbium

Erbium, ₆₈Er

Erbium
Pronunciation	/ˈɜːrbiəm/ ​(UR-bee-əm)
Appearance	sillery white
Standard atomic weight Ar, std(Er)	7002167259000000000♠167.259(3)
Erbium 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 - ↑ Er ↓ Fm holmium ← erbium → thulium
Atomic nummer (Z)	68
Group	group n/a
Period	period 6
Block	f-block
Element category	Lanthanide
Electron confeeguration	[Xe] 4f12 6s2
Electrons per shell	2, 8, 18, 30, 8, 2
Pheesical properties
Phase at STP	solit
Meltin pynt	1802 K ​(1529 °C, ​2784 °F)
Bylin pynt	3141 K ​(2868 °C, ​5194 °F)
Density (near r.t.)	9.066 g/cm3
when liquid (at m.p.)	8.86 g/cm3
Heat o fusion	19.90 kJ/mol
Heat o vapourisation	280 kJ/mol
Molar heat capacity	28.12 J/(mol·K)
Vapour pressur P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 1504 1663 (1885) (2163) (2552) (3132)
Atomic properties
Oxidation states	0, +1, +2, +3 (a basic oxide)
Electronegativity	Pauling scale: 1.24
Atomic radius	empirical: 176 pm
Covalent radius	189±6 pm
Colour lines in a spectral range Spectral lines o erbium
Ither properties
Naitural occurrence	primordial
Creestal structur	​hexagonal close-packed (hcp)
Speed o soond thin rod	2830 m/s (at 20 °C)
Thermal expansion	(r.t.) (poly) 12.2 µm/(m·K)
Thermal conductivity	14.5 W/(m·K)
Electrical resistivity	(r.t.) (poly) 0.860 µ Ω·m
Magnetic orderin	paramagnetic at 300 K
Young's modulus	69.9 GPa
Shear modulus	28.3 GPa
Bulk modulus	44.4 GPa
Poisson ratio	0.237
Vickers haurdness	589 MPa
Brinell haurdness	814 MPa
CAS Nummer	7440-52-0
History
Diskivery	Carl Gustaf Mosander (1842)
Main isotopes o erbium
Iso­tope Abun­dance Hauf-life (t1/2) Decay mode Pro­duct 160Er syn 28.58 h ε 160Ho 162Er 0.139% >1.4×1014 y (α) 158Dy (β+β+) 162Dy 164Er 1.601% - (α) 160Dy (β+β+) 164Dy 165Er syn 10.36 h ε 165Ho 166Er 33.503% - (α) 162Dy 167Er 22.869% - (α) 163Dy 168Er 26.978% - (α) 164Dy 169Er syn 9.4 d β− 169Tm 170Er 14.910% >3.2×1017 y (α) 166Dy (β−β−) 170Yb 171Er syn 7.516 o β− 171Tm 172Er syn 49.3 o β− 172Tm
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	1529	—	—
K	1802	1802	0
F	2784	2784	0
WD	!
input	C: 1529, K: 1802, F: 2784
comment

style="text-align:left"| data b.p. cat
	in	calc from C	diff	report	ref
C	2868	—	—
K	3141	3141	0
F	5194	5194	0
WD	!
input	C: 2868, K: 3141, F: 5194
comment

References

Thir references will appear in the airticle, but this list appears anerly on this page.