Do you understand the base metals in metal rare earths? Now Baotou Fangyuan Rare Earth Alloy Co., Ltd. will introduce you to its details. I hope everyone can understand! 镧 is a kind of gold......
Do you understand the base metals in metal rare earths? Now Baotou Fangyuan Rare Earth Alloy Co., Ltd. will introduce you to its details. I hope everyone can understand!
Bismuth is a rare earth element with an atomic number of 57 and an atomic weight of 138.9055 . The element name is derived from Greek and the original meaning is "hidden". Silver-gray luster, soft texture, density 6.174g/cm3 , melting point 921 °C, boiling point 3457 °C; chemically active, quickly loses metallic luster after exposure to air to form a blue oxide film, but it does not protect metal It is then further oxidized to form a white oxide powder. It can react slowly with cold water, is soluble in acid, and can react with various non-metals. Metal ruthenium is generally stored in mineral oil or rare gases. The content of strontium in the earth's crust is 0.00183% , which is second only to strontium in rare earth elements. There are two natural isotopes: 镧 139 and radioactive cesium 138 .
The metal crucible is a silver-white metal that is soft and easy to cut. The fresh section is silver-gray and easily oxidized in the air. There are three crystal forms, α type, hexagonal system, β type, face center cubic accumulation, stable at 350 ° C, density = 6.19 g / cm3; γ type, > 868 ° C stable existence, density = 5.98 g / cm3. Avoid contact with acids, oxides, halogens, and sulfur. Contact with substances such as heat, open flames, and oxidants may cause a burning hazard.
The above is the introduction of base metals in rare earth elements. I hope everyone can refer to them!