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Zirconium |
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Pípè | /zərˈkoʊniəm/ (zər-KOH-nee-əm) |
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Ìhànsójú | silvery white |
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Ìwúwo átọ̀mù Ar, std(Zr) | 91.224(2)[1] |
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Zirconium ní orí tábìlì àyè |
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Nọ́mbà átọ̀mù (Z) | 40 |
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Ẹgbẹ́ | group 4 |
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Àyè | àyè 5 |
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Àdìpọ̀ | Àdìpọ̀-d |
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Ẹ̀ka ẹ́límẹ́ntì | Transition metal |
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Ìtò ẹ̀lẹ́ktrọ́nù | [Kr] 4d2 5s2 |
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Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan | 2, 8, 18, 10, 2 |
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Àwọn ohun ìní ara |
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Ìfarahàn at STP | solid |
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Ìgbà ìyọ́ | 2128 K (1855 °C, 3371 °F) |
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Ígbà ìhó | 4682 K (4409 °C, 7968 °F) |
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Kíki (near r.t.) | 6.52 g/cm3 |
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when liquid (at m.p.) | 5.8 g/cm3 |
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Heat of fusion | 14 kJ/mol |
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Heat of | 573 kJ/mol |
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Molar heat capacity | 25.36 J/(mol·K) |
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pressure
P (Pa)
|
1
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10
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100
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1 k
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10 k
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100 k
|
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at T (K)
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2639
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2891
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3197
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3575
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4053
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4678
|
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Atomic properties |
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Oxidation states | −2, +1,[2] +2, +3, +4 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment |
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Electronegativity | Pauling scale: 1.33 |
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Atomic radius | empirical: 160 pm |
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Covalent radius | 175±7 pm |
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Spectral lines of zirconium |
Other properties |
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Natural occurrence | primordial |
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Crystal structure | hexagonal close-packed (hcp) |
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Speed of sound thin rod | 3800 m/s (at 20 °C) |
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Thermal expansion | 5.7 µm/(m·K) (at 25 °C) |
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Thermal conductivity | 22.6 W/(m·K) |
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Electrical resistivity | 421 n Ω·m (at 20 °C) |
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Magnetic ordering | paramagnetic[3] |
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Young's modulus | 88 GPa |
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Shear modulus | 33 GPa |
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Bulk modulus | 91.1 GPa |
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Poisson ratio | 0.34 |
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Mohs hardness | 5.0 |
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Vickers hardness | 903 MPa |
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Brinell hardness | 650 MPa |
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CAS Number | 7440-67-7 |
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Main isotopes of zirconium |
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Àdàkọ:Category-inline | references |