| Element | Platinum |
| Symbol | Pt |
| Atomic Mass | 195.08 |
| Atomic Number | 78 |
| Name Origins | Spanish, platina = silver |
| Year Discovered | 1750 |
| Discovered Credits | Known to pre-Columbian South Americans and taken to Europe about 1790. |
| Remarks | Silvery-white metal, lustrous, malleable, ductile. Unaffected by oxygen and water, only dissolves in aqua-regia and fused alkalis. Used in jewelry, drugs, catalysts, etc. |
| Diagnostic Tests | There are no simple chemical tests for platinum. The element is usually found as an alloy or a sulfide mineral with other platinum group metals. Atomic Absorption Spectroscopy is used for quantitative analysis and Energy Dispersive Analysis of X-rays (EDAX) is used for qualitative analysis. |
| References | Emsley, J., 1991; THE ELEMENTS : Sec. Ed., Clarendon Press, Oxford, 251 p. |
Naturally Ocurring Isotopes :
| Mass | Nuclide Number | Natural Abundance | Half-life | Half-life Unit | Decay Mode | Decay Mode MeV | Decay Mode % | ||||||||
| 189.959917 | 190 | 0.01 % | 6,9x1011 | Years | alpha | 3,18 | 100,0 | ||||||||
| 191.961019 | 192 | 0.79 % | 1x1015 | Years | alpha | 100,0 | |||||||||
| 193.962655 | 194 | 32.9 % | Stable | ||||||||||||
| 194.964766 | 195 | 33.8 % | Stable | ||||||||||||
| 195.965 | 196 | 25.3 % | Stable | ||||||||||||
| 197.967869 | 198 | 7.2 % | Stable |
44 Minerals sorted by % of Pt (Platinum) :
| Platinum | 100.00 % | Pt |
| Yixunite | 83.60 % | Pt3In |
| Tetraferroplatinum | 77.74 % | PtFe |
| Ferronickelplatinum | 77.31 % | Pt2FeNi |
| Tulameenite | 76.57 % | Pt2FeCu |
| Isoferroplatinum | 76.13 % | (Pt,Pd)3(Fe,Cu) |
| Luberoite | 75.54 % | Pt5Se4 |
| Hongshiite | 75.43 % | PtCu |
| Rustenburgite | 68.86 % | (Pt,Pd)3Sn |
| Cooperite | 62.62 % | (Pt,Pd,Ni)S |
| Braggite | 62.62 % | (Pt,Pd,Ni)S |
| Niggliite | 62.17 % | PtSn |
| Tatyanaite | 58.18 % | (Pt,Pd,Cu)9Cu3Sn4 |
| Stumpflite | 57.61 % | Pt(Sb,Bi) |
| Sperrylite | 56.56 % | PtAs2 |
| Genkinite | 55.37 % | (Pt,Pd)4Sb3 |
| Sudovikovite | 55.26 % | PtSe2 |
| Malanite | 50.40 % | Cu(Pt,Ir)2S4 |
| Daomanite | 49.05 % | |
| Damiaoite | 45.93 % | PtIn2 |
| Platarsite | 44.17 % | (Pt,Rh,Ru)AsS |
| Dayingite | 43.76 % | CuCoPtS4 |
| Geversite | 40.46 % | Pt(Sb,Bi)2 |
| Rhodium | 38.72 % | (Rh,Pt) |
| Maslovite | 36.69 % | PtBiTe |
| Insizwaite | 34.26 % | Pt(Bi,Sb)2 |
| Moncheite | 31.21 % | (Pt,Pd)(Te,Bi)2 |
| Vincentite | 30.48 % | (Pd,Pt)3(As,Sb,Te) |
| Atokite | 29.00 % | (Pd,Pt)3Sn |
| Zvyagintsevite | 28.72 % | (Pd,Pt,Au)3(Pb,Sn) |
| Hollingworthite | 24.60 % | (Rh,Pt,Pd)AsS |
| Konderite | 19.43 % | PbCu3(Rh,Pt,Ir)8S16 |
| Oulankaite | 18.37 % | (Pd,Pt)5(Cu,Fe)4SnTe2S2 |
| Xingzhongite | 18.13 % | (Pb,Cu,Fe)(Ir,Pt,Rh)2S4 |
| Inaglyite | 15.90 % | PbCu3(Ir,Pt)8S16 |
| Crerarite | 15.26 % | (Pt,Pb)Bi3(S,Se)4-x (x~0.7) |
| Taimyrite | 13.74 % | (Pd,Cu,Pt)3Sn |
| Merenskyite | 11.49 % | (Pd,Pt)(Te,Bi)2 |
| Kharaelakhite | 11.08 % | (Pt,Cu,Pb,Fe,Ni)9S8 |
| Iridium | 10.67 % | (Ir,Os,Ru,Pt) |
| Michenerite | 10.48 % | (Pd,Pt)BiTe |
| Bowieite | 10.09 % | (Rh,Ir,Pt)1.77S3 |
| Irarsite | 7.67 % | (Ir,Ru,Rh,Pt)AsS |
| Ferrorhodsite | 2.33 % | (Fe,Cu)(Rh,Ir,Pt)2S4 |