Template:Infobox holmium

Holmium, ₆₇Ho

Holmium
Pronunciation	/ˈhoʊlmiəm/ ​(HOHL-mee-əm)
Appearance	sillery white
Standard atomic weight Ar, std(Ho)	7002164930328000000♠164.930328(7)
Holmium 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 - ↑ Ho ↓ Es dysprosium ← holmium → erbium
Atomic nummer (Z)	67
Group	group n/a
Period	period 6
Block	f-block
Element category	Lanthanide
Electron confeeguration	[Xe] 4f11 6s2
Electrons per shell	2, 8, 18, 29, 8, 2
Pheesical properties
Phase at STP	solit
Meltin pynt	1734 K ​(1461 °C, ​2662 °F)
Bylin pynt	2993 K ​(2720 °C, ​4928 °F)
Density (near r.t.)	8.79 g/cm3
when liquid (at m.p.)	8.34 g/cm3
Heat o fusion	17.0 kJ/mol
Heat o vapourisation	265 kJ/mol
Molar heat capacity	27.15 J/(mol·K)
Vapour pressur P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 1432 1584 (1775) (2040) (2410) (2964)
Atomic properties
Oxidation states	0, +1, +2, +3 (a basic oxide)
Electronegativity	Pauling scale: 1.23
Atomic radius	empirical: 176 pm
Covalent radius	192±7 pm
Colour lines in a spectral range Spectral lines o holmium
Ither properties
Naitural occurrence	primordial
Creestal structur	​hexagonal close-packed (hcp)
Speed o soond thin rod	2760 m/s (at 20 °C)
Thermal expansion	(r.t.) (poly) 11.2 µm/(m·K)
Thermal conductivity	16.2 W/(m·K)
Electrical resistivity	(r.t.) (poly) 814 n Ω·m
Magnetic orderin	paramagnetic
Young's modulus	64.8 GPa
Shear modulus	26.3 GPa
Bulk modulus	40.2 GPa
Poisson ratio	0.231
Vickers haurdness	481 MPa
Brinell haurdness	746 MPa
CAS Nummer	7440-60-0
History
Diskivery	Marc Delafontaine (1878)
Main isotopes o holmium
Iso­tope Abun­dance Hauf-life (t1/2) Decay mode Pro­duct 163Ho syn 4570 yr ε 163Dy 164Ho syn 29 min ε 164Dy 165Ho 100% stable 166Ho syn 26.763 h β− 166Er 167Ho syn 3.1 h β− 167Er

style="text-align:left"| data m.p. cat
	in	calc from C	diff	report	ref
C	1461	—	—
K	1734	1734	0
F	2662	2662	0
WD	1734 !1734 kelvin
input	C: 1461, K: 1734, F: 2662
comment

style="text-align:left"| data b.p. cat
	in	calc from C	diff	report	ref
C	2720	—	—
K	2993	2990	3
F	4928	4930	-2
WD	2873 !2873 kelvin
input	C: 2720, K: 2993, F: 4928
comment

References

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