Usually, people put gold and white silver regarded as the most precious thing. In fact, the platinum group metals is much more noble than silver and gold. The platinum group element has six members: ruthenium , rhodium , palladium , iridium , osmium , and platinum.

The representative of the platinum group is platinum, commonly known as platinum, which has historically been used as a waste or even a dangerously low-lying thing. In the 16th and 17th centuries, the Spaniards discovered this unknown silver-like heavy metal granule from South America and shipped it back to Spain for sale at a much cheaper price than silver. Some sinisters use it to mix with gold to make "golden" jewelry and fake gold coins. After the king was informed, he issued an order to pour all the platinum into the sea.

In 1741, Dr. W. Brownridge of the United Kingdom received a silver-white shiny ore from a relative, a natural platinum block discarded by a Spanish gold hunter. After refining and testing, in 1750, the new element platinum was officially announced. It took people nearly 100 years to find other members of the "Noble House" in natural platinum ore. The reason why they are so struggling is that they are only one part per billion in the earth's crust and are often mixed in other metal mines.

More than 80 platinum group minerals and platinum group-containing minerals have been discovered. The impact sand platinum mine in Yekaterinburg, the Platino Tyre Pinto River in Colombia, is famous in the world. The main producers of Platinum are South Africa and the Soviet Union. South Africa accounts for 82.3% of the world's total platinum reserves, the Soviet Union accounts for 15.6%, and others include Canada, Colombia and the United States. In 1988, Zimbabwe discovered a large platinum mine.

On the north side of the Hexi Corridor in Gansu Province, China, there is an emerging “Oriental Nickel Capital” – Jinchang City. It is currently the largest platinum group metal resource and production base in China. In recent years, a nickel deposit similar to Jinchuan has been discovered in eastern Xinjiang.

The platinum group metal is silvery white except that the ruthenium is blue-gray. Platinum group metals have high melting point, corrosion resistance, thermoelectric stability, good erosion resistance against electric sparks, good high temperature temperature resistance, oxidation resistance and catalysis, and are widely used in industry. Platinum is widely used as a spark plug electrode for jewelry and automobile engines; 铱 and 锇 are the protagonists in the small dot on the sheet metal nib, wear-resistant; anti-fluorine at high temperatures, anti-sulfur and hydrogen sulfide corrosion; at normal temperature, A volume of palladium can absorb about 1000 times the volume of hydrogen; under normal circumstances, the hydrogen and oxygen combination reaction is at least 10 million years, but in this reaction, as long as a little platinum powder is sprinkled, a popping sound is generated immediately. The water, but the magic of platinum powder is still the same.

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