Platin

Dëse Chimiesartikel ass eréischt just eng Skizz. Wann Dir méi iwwer dëst Theema wësst, sidd Dir häerzlech invitéiert, aus dëse puer Sätz e richtegen Artikel ze schreiwen. Wann Dir beim Schreiwen Hëllef braucht, da luusst bis an d'FAQ eran.

De Platin ass, wéi d'Gold an d'Sëlwer, en Eedelmetall. Et figuréiert op der 78. Plaz am cheemesche Periodesystem vun den Elementer an huet als Zeechen: Pt.

Eegenschaften
Iridium - Platin - Gold
Pd
Pt
Ds  
 
 
[Xe]4f145d96s1
195
78
Pt
Serie Iwwergangsmetaller
Grupp, Periode, Block 10 (VIIIb), 6, d
Ausgesinn gro-wäiss
Massundeel am Erdmantel 5 · 10−7 %
Atomar
Atommass 195,078
Atomradius (berechent) 135 (177) pm
Kovalente Radius 128 pm
van der Waals-Radius 175 pm
Elektronekonfiguratioun [Xe]4f145d96s1
Elektronen pro Energieniveau 2, 8, 18, 32, 17, 1
Oxidationszoustänn (Oxiden) 0, 2, 4 (liicht basesch)
Normalpotential 1,118 V (Pt2+ + 2e- → Pt)
Elektronegativitéit 2,28 (Pauling-Skala)
Austrëttsaarbecht 5,7-6,35 eV
1. Ioniséierungsenergie 870 kJ/mol
2. Ioniséierungsenergie 1791 kJ/mol
Physikalesch
Aggregatzoustand fest
Modifikatiounen -
Kristallstruktur kubesch flächenzentréiert
Dicht (Mohshäert) 21450 kg/m3 (4,3)
Magnéitismus paramagnéitesch
Schmëlzpunkt 2045 K (1772 °C)
Kachpunkt 4100 K (3827 °C)
Molare Volumen 9,1 · 10−6 m3/mol
Verdampfungswäermt 510 kJ/mol
Schmëlzwäermt 19,6 kJ/mol
Dampdrock 0,0312 Pa bei 2045 K
Schallgeschwënnegkeet 2680 m/s bei 293,15 K
Verschiddenes
Spezifesch Wäermtkapazitéit 130 J/(kg · K)
Elektresche Leedfäegkeet 9,66 · 106/m Ohm
Wäermtleedfäegkeet 71,6 W/(m · K)
Isotopen
iso NH Hallefwäertzäit DM DE MeV DP
188Pt {syn.} 10,2 d ε 0,507 188Ir
189Pt {syn.} 10,87 h ε 1,971 189Ir
190Pt 0,01 % 6,5 · 1011 a α 3,249 186Os
191Pt {syn.} 2,96 d ε 1,019 191Ir
192Pt 0.79 % Pt ist stabil mat 114 Neutronen
193Pt {syn.} 50 a ε 0,057 193Ir
194Pt 32.9 % Pt ass stabil mat 116 Neutronen
195Pt 33.8 % Pt ass stabil mat 117 Neutronen
196Pt 25.3 % Pt ass stabil mat 118 Neutronen
197Pt {syn.} 19,8915 h β- 0,719 197Au
198Pt 7.2 % Pt ass stabil mat 120 Neutronen
199Pt {syn.} 30,80 min β- 1,702 199Au
200Pt {syn.} 12,5 h β- 0,660 200Au
NMR-Eegenschaften
195Pt
Käerspin 1/2
gamma / rad/T 5,751 · 107
Empfindlechkeet 0,00994
Larmorfrequenz bei B = 4,7 T 43 MHz
Sowäit wéi méiglech a gebräichlech, ginn SI-Eenheete gebraucht.
Wann net anescht ugemierkt
gëllen dës Daten bei Normbedingungen.

Um Spaweck

Commons: Platin – Biller, Videoen oder Audiodateien

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