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| Certification: | ISO |
| Shape: | Block |
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Platinum is a chemical element. Its chemical symbol is Pt, and its atomic number is 78. It often exists in nature as a natural mineral and is extremely dispersed. It is often obtained by enriching and extracting primary platinum ore. It was discovered and named by the Spaniard Ulloa in 1735 and reported its discovery in 1748.
Platinum is a natural white precious metal element, element symbol Pt, pure white color;
The molecular weight was 195.084
Melting point: 1773 ° C (1064.18 ° C for gold);
Density: 21.35g/ cubic cm (19.3g/ cubic cm for gold) heavier than gold;
Valence: +1, +2, +3, +4, commonly +2, +4, +5 in xenon hexafluoride platinate, +6 in platinum hexafluoride, the latter two are rarely seen.
Mohs hardness: 4-4.5 degrees (gold is 2.5 degrees), chemical stability, except aqua regia acid and alkali corrosion;
Natural platinum reserves are rarer than gold, commonly used as a material for valuable jewelry;
An alloy of platinum and iridium is used to make fountain pens.
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Platinum has superior performance and a wide range of uses. In the jewelry industry, mainly used as ornaments and crafts. In the chemical industry, used in the manufacture of high-grade chemical vessels, platinum crucible, electrodes, and catalysts to speed up chemical reactions. Platinum-iridium alloys are used to make fountain pens. Especially in the automobile industry, platinum in exhaust gas treatment and other aspects of the role of irreplaceable, consumption accounts for almost half of the industrial consumption of platinum.
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