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Platinum |
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Pípè | /ˈplætᵻnəm/ (PLAT-ə-nəm) |
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Ìhànsójú | grayish white |
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Ìwúwo átọ̀mù Ar, std(Pt) | 195.084(9)[1] |
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Platinum ní orí tábìlì àyè |
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Nọ́mbà átọ̀mù (Z) | 78 |
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Ẹgbẹ́ | group 10 |
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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 5d9 6s1 |
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Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan | 2, 8, 18, 32, 17, 1 |
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Àwọn ohun ìní ara |
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Ìfarahàn at STP | solid |
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Ìgbà ìyọ́ | 2041.4 K (1768.3 °C, 3214.9 °F) |
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Ígbà ìhó | 4098 K (3825 °C, 6917 °F) |
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Kíki (near r.t.) | 21.45 g/cm3 |
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when liquid (at m.p.) | 19.77 g/cm3 |
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Heat of fusion | 22.17 kJ/mol |
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Heat of | 469 kJ/mol |
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Molar heat capacity | 25.86 J/(mol·K) |
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pressure
P (Pa)
|
1
|
10
|
100
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1 k
|
10 k
|
100 k
|
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at T (K)
|
2330
|
(2550)
|
2815
|
3143
|
3556
|
4094
|
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Atomic properties |
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Oxidation states | −3, −2, −1, 0, +1, +2, +3, +4, +5, +6 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment |
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Electronegativity | Pauling scale: 2.28 |
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Atomic radius | empirical: 139 pm |
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Covalent radius | 136±5 pm |
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Van der Waals radius | 175 pm |
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Spectral lines of platinum |
Other properties |
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Natural occurrence | primordial |
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Crystal structure | (fcc) |
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Thermal expansion | 8.8 µm/(m·K) (at 25 °C) |
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Thermal conductivity | 71.6 W/(m·K) |
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Electrical resistivity | 105 n Ω·m (at 20 °C) |
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Magnetic ordering | paramagnetic |
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Young's modulus | 168 GPa |
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Shear modulus | 61 GPa |
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Bulk modulus | 230 GPa |
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Poisson ratio | 0.38 |
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Mohs hardness | 4–4.5 |
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Vickers hardness | 549 MPa |
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Brinell hardness | 392 MPa |
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CAS Number | 7440-06-4 |
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Main isotopes of platinum |
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Àdàkọ:Category-inline | references |