Holmium

Holmium, ₆₇Ho

Holmium
Pípè	/ˈhoʊlmiəm/ ​(HOHL-mee-əm)
Ìhànsójú	silvery white
Ìwúwo átọ̀mù Ar, std(Ho)	164.930328(7)[1]
Holmium ní orí tábìlì àyè
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 - ↑ Ho ↓ Es dysprosium ← holmium → erbium
Nọ́mbà átọ̀mù (Z)	67
Ẹgbẹ́	group n/a
Àyè	àyè 6
Àdìpọ̀	Àdìpọ̀-f
Ẹ̀ka ẹ́límẹ́ntì	Lanthanide
Ìtò ẹ̀lẹ́ktrọ́nù	[Xe] 4f11 6s2
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan	2, 8, 18, 29, 8, 2
Àwọn ohun ìní ara
Ìfarahàn at STP	solid
Ìgbà ìyọ́	1734 K ​(1461 °C, ​2662 °F)
Ígbà ìhó	2993 K ​(2720 °C, ​4928 °F)
Kíki (near r.t.)	8.79 g/cm3
when liquid (at m.p.)	8.34 g/cm3
Heat of fusion	17.0 kJ/mol
Heat of	265 kJ/mol
Molar heat capacity	27.15 J/(mol·K)
pressure 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,[2] +1, +2, +3 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment
Electronegativity	Pauling scale: 1.23
Atomic radius	empirical: 176 pm
Covalent radius	192±7 pm
Color lines in a spectral range Spectral lines of holmium
Other properties
Natural occurrence	primordial
Crystal structure	​hexagonal
Speed of sound 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 ordering	paramagnetic
Young's modulus	64.8 GPa
Shear modulus	26.3 GPa
Bulk modulus	40.2 GPa
Poisson ratio	0.231
Vickers hardness	481 MPa
Brinell hardness	746 MPa
CAS Number	7440-60-0
Main isotopes of holmium
Iso­tope Abun­dance Half-life (t1/2) Decay mode Pro­duct 163Ho syn 4570 yr ε 0.003 163Dy 164Ho syn 29 min ε 0.987 164Dy 165Ho 100% 165Ho is stable with 98 neutrons 166Ho syn 26.763 h β− 1.855 166Er 167Ho syn 3.1 h β− 1.007 167Er
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