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Dysprosium |
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Pronunciation | (dis-PROH-zee-əm) |
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Appearance | sillery white |
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Standard atomic weight Ar, std(Dy) | 7002162500000000000♠162.500(1)[1] |
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Dysprosium in the periodic cairt |
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Atomic nummer (Z) | 66 |
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Group | group n/a |
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Period | period 6 |
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Block | f-block |
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Element category | Lanthanide |
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Electron confeeguration | [Xe] 4f10 6s2 |
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Electrons per shell | 2, 8, 18, 28, 8, 2 |
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Pheesical properties |
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Phase at STP | solit |
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Meltin pynt | 1680 K (1407 °C, 2565 °F) |
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Bylin pynt | 2840 K (2562 °C, 4653 °F) |
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Density (near r.t.) | 8.540 g/cm3 |
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when liquid (at m.p.) | 8.37 g/cm3 |
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Heat o fusion | 11.06 kJ/mol |
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Heat o vapourisation | 280 kJ/mol |
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Molar heat capacity | 27.7 J/(mol·K) |
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Vapour pressur
P (Pa)
|
1
|
10
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100
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1 k
|
10 k
|
100 k
|
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at T (K)
|
1378
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1523
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(1704)
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(1954)
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(2304)
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(2831)
|
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Atomic properties |
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Oxidation states | 0,[2] +1, +2, +3, +4 waikly basic |
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Electronegativity | Pauling scale: 1.22 |
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Atomic radius | empirical: 178 pm |
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Covalent radius | 192±7 pm |
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Spectral lines o dysprosium |
Ither properties |
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Naitural occurrence | primordial |
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Creestal structur | hexagonal close-packed (hcp) |
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Speed o soond thin rod | 2710 m/s (at 20 °C) |
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Thermal expansion | (r.t.) (α, poly) 9.9 µm/(m·K) |
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Thermal conductivity | 10.7 W/(m·K) |
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Electrical resistivity | (r.t.) (α, poly) 926 n Ω·m |
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Magnetic orderin | paramagnetic at 300 K |
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Young's modulus | (α form) 61.4 GPa |
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Shear modulus | (α form) 24.7 GPa |
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Bulk modulus | (α form) 40.5 GPa |
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Poisson ratio | (α form) 0.247 |
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Vickers haurdness | 540 MPa |
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Brinell haurdness | 500 MPa |
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CAS Nummer | 7429-91-6 |
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History |
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Diskivery | Lecoq de Boisbaudran (1886) |
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Main isotopes o dysprosium |
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| references |