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Holmyo

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Holmium
67Ho
-

Ho

Es
Hydrogen (other non-metal)
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Thulium (lanthanoid)
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Actinium (actinoid)
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Rutherfordium (transition metal)
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Bohrium (transition metal)
Hassium (transition metal)
Meitnerium (unknown chemical properties)
Darmstadtium (unknown chemical properties)
Roentgenium (unknown chemical properties)
Copernicium (transition metal)
Ununtrium (unknown chemical properties)
Flerovium (unknown chemical properties)
Ununpentium (unknown chemical properties)
Livermorium (unknown chemical properties)
Ununseptium (unknown chemical properties)
Ununoctium (unknown chemical properties)
dysprosiumholmiumerbium
Panagway
silvery white
Kinatibuk-ang mga kinaiya
Ngalan, simbolo, kaiphan holmium, Ho, 67
Paglitok /ˈhlmiəm/ [[Help:Pronunciation respelling key|Plantilya:Smallcaps all-mee-əm]]
Kategoriyang elemento puthaw nga lantanido
Group, period, block n/a6, f
Gibug-aton sa atomo 164.93032
Kontorno sa elektron [Xe] 4f11 6s2
2, 8, 18, 29, 8, 2
Electron shells of holmium (2, 8, 18, 29, 8, 2)
Electron shells of holmium (2, 8, 18, 29, 8, 2)
History
Pagkadiskobre Marc Delafontaine (1878)
Physical properties
Phase magahi
Density (near r.t.) 8.79 g·cm−3
Liquid density at m.p. 8.34 g·cm−3
Melting point 1734 K, 1461 °C, 2662 °F
Boiling point 2993 K, 2720 °C, 4928 °F
Heat of fusion 17.0 kJ·mol−1
Heat of vaporization 265 kJ·mol−1
Molar heat capacity 27.15 J·mol−1·K−1
Vapor 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 3, 2, 1

(basic oxide)

Electronegativity 1.23 (Pauling scale)
Ionization energies 1st: 581.0 kJ·mol−1
2nd: 1140 kJ·mol−1
3rd: 2204 kJ·mol−1
Atomic radius 176 pm
Covalent radius 192±7 pm
Miscellanea
Crystal structure hexagonal
Holmium has a hexagonal crystal structure
Magnetic ordering paramagnetic
Electrical resistivity (r.t.) (poly) 814 nΩ·m
Thermal conductivity 16.2 W·m−1·K−1
Thermal expansion (r.t.) (poly) 11.2 µm/(m·K)
Speed of sound (thin rod) (20 °C) 2760 m·s−1
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 registry number 7440-60-0
Most stable isotopes
Main article: Isotopes of holmium
iso NA half-life DM DE (MeV) DP
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
· r

Ang holmyo (Iningles holmium) mao ang elementong kimiko sa talaang peryodiko nga may simbolo nga Ho ug kaiphan nga atomik 67. Ang holmyo mao ang puthaw nga lantanido.

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