 |
Erbium |
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Pípè | /ˈɜːrbiəm/ (UR-bee-əm) |
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Ìhànsójú | silvery white |
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Ìwúwo átọ̀mù Ar, std(Er) | 167.259(3)[1] |
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Erbium ní orí tábìlì àyè |
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|
Nọ́mbà átọ̀mù (Z) | 68 |
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Ẹgbẹ́ | group n/a |
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Àyè | àyè 6 |
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Àdìpọ̀ | Àdìpọ̀-f |
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Ẹ̀ka ẹ́límẹ́ntì | Lanthanide |
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Ìtò ẹ̀lẹ́ktrọ́nù | [Xe] 4f12 6s2 |
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Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan | 2, 8, 18, 30, 8, 2 |
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Àwọn ohun ìní ara |
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Ìfarahàn at STP | solid |
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Ìgbà ìyọ́ | 1802 K (1529 °C, 2784 °F) |
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Ígbà ìhó | 3141 K (2868 °C, 5194 °F) |
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Kíki (near r.t.) | 9.066 g/cm3 |
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when liquid (at m.p.) | 8.86 g/cm3 |
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Heat of fusion | 19.90 kJ/mol |
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Heat of | 280 kJ/mol |
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Molar heat capacity | 28.12 J/(mol·K) |
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pressure
P (Pa)
|
1
|
10
|
100
|
1 k
|
10 k
|
100 k
|
---|
at T (K)
|
1504
|
1663
|
(1885)
|
(2163)
|
(2552)
|
(3132)
|
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|
Atomic properties |
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Oxidation states | 0,[2] +1, +2, +3 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment |
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Electronegativity | Pauling scale: 1.24 |
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Atomic radius | empirical: 176 pm |
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Covalent radius | 189±6 pm |
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Spectral lines of erbium |
Other properties |
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Natural occurrence | primordial |
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Crystal structure | hexagonal |
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Speed of sound thin rod | 2830 m/s (at 20 °C) |
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Thermal expansion | (r.t.) (poly) 12.2 µm/(m·K) |
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Thermal conductivity | 14.5 W/(m·K) |
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Electrical resistivity | (r.t.) (poly) 0.860 µ Ω·m |
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Magnetic ordering | paramagnetic at 300 K |
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Young's modulus | 69.9 GPa |
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Shear modulus | 28.3 GPa |
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Bulk modulus | 44.4 GPa |
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Poisson ratio | 0.237 |
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Vickers hardness | 589 MPa |
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Brinell hardness | 814 MPa |
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CAS Number | 7440-52-0 |
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Main isotopes of erbium |
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Àdàkọ:Category-inline | references |