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Osmium |
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Pípè | /ˈɒzmiəm/ (OZ-mee-əm) |
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Ìhànsójú | silvery, blue cast |
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Ìwúwo átọ̀mù Ar, std(Os) | 190.23(3)[1] |
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Osmium ní orí tábìlì àyè |
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Nọ́mbà átọ̀mù (Z) | 76 |
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Ẹgbẹ́ | group 8 |
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Àyè | àyè 6 |
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Àdìpọ̀ | Àdìpọ̀-d |
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Ẹ̀ka ẹ́límẹ́ntì | Transition metal |
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Ìtò ẹ̀lẹ́ktrọ́nù | [Xe] 4f14 5d6 6s2 |
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Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan | 2, 8, 18, 32, 14, 2 |
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Àwọn ohun ìní ara |
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Ìfarahàn at STP | solid |
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Ìgbà ìyọ́ | 3306 K (3033 °C, 5491 °F) |
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Ígbà ìhó | 5285 K (5012 °C, 9054 °F) |
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Kíki (near r.t.) | 22.59 g/cm3 |
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when liquid (at m.p.) | 20 g/cm3 |
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Heat of fusion | 57.85 kJ/mol |
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Heat of | 738 kJ/mol |
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Molar heat capacity | 24.7 J/(mol·K) |
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pressure
P (Pa)
|
1
|
10
|
100
|
1 k
|
10 k
|
100 k
|
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at T (K)
|
3160
|
3423
|
3751
|
4148
|
4638
|
5256
|
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Atomic properties |
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Oxidation states | −4, −2, −1, 0, +1, +2, +3, +4, +5, +6, +7, +8 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment |
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Electronegativity | Pauling scale: 2.2 |
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Atomic radius | empirical: 135 pm |
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Covalent radius | 144±4 pm |
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Spectral lines of osmium |
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 | 4940 m/s (at 20 °C) |
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Thermal expansion | 5.1 µm/(m·K) (at 25 °C) |
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Thermal conductivity | 87.6 W/(m·K) |
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Electrical resistivity | 81.2 n Ω·m (at 0 °C) |
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Magnetic ordering | paramagnetic[2] |
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Shear modulus | 222 GPa |
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Bulk modulus | 462 GPa |
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Poisson ratio | 0.25 |
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Mohs hardness | 7.0 |
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Brinell hardness | 3920 MPa |
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CAS Number | 7440-04-2 |
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Main isotopes of osmium |
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Àdàkọ:Category-inline | references |