The name of the chemical element beryllium is derived from the Greek word beryllos= pale. From the mineral beryl In 1798 Louis-Nicholas Vauquelin, a French chemist, discovered that an unknown element was present in emeralds and beryl. Beryllium was first found in emeralds from the mountains of France and California.
Beryllium is a solid at room temperature with the density of 1.85 g/cm3 Color: gray. Melting point: 1278 °C Boiling point: 2970.0 °C It is also required in those applications where an excellent head conductor, with high strength and hardness and with a very high melting point is needed. Even it should act as an electrical insulator.
Beryllium is found in Scientists know that the approximately 30 mineral current exposure limit for species, including beryl beryllium set by the (3BeO Al2O3 6SiO2), Occupational Safety and bertrandite (4BeO 2SiO2 Health Administration of 2 H2O), chrysoberyl, and micrograms of airborne phenacite. The metal may be beryllium per cubic meter of prepared by reducing air per 8-hour day leaves a beryllium fluoride with significant percentage of magnesium metal. workers, at risk. Simply reducing current Beryllium is widely used in exposure limits may not spite of its relatively high reduce the number of workers cost of over $400 per pound stricken with chronic because for certain critical beryllium disease (CBD), applications it performs which results in death in about better than alternatives. 30% of sufferers.
Beryllium is relatively Beryllium is alloyed with transparent to X-rays and is copper (2% beryllium, 98% used to make windows for copper) to form a wear X-ray tubes. When exposed resistant material, known as to alpha particles, such as beryllium bronze, used in those emitted by radium or gyroscopes and other devices polonium, beryllium emits where wear resistance is neutrons and is used as a important. neutron source. Beryllium is Beryllium is alloyed with also used as a moderator in nickel (2% beryllium, 98% nuclear reactors nickel) to make springs, spot- Used in spacecraft, missiles, welding electrodes and non- aircraft sparking tools. In the making of gyroscopes, Other beryllium alloys are various computer used in the windshield, brake equipment, watch springs disks and other structural and instruments that components of the space requires light-weight, shuttle. rigidity and dimensional stability.
Beryllium and its compounds are toxic and should not be tasted to verify the metals sweetness. Beryllium metal is extremely stiff and lightweight and has a modulus of elasticity almost 50 percent greater than that of steel with only about one-fourth the weight Beryllium has one of the highest melting points of the light metals
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