Beryllium

Beryllium is the chemical element with the symbol Be and atomic number 4. Because any beryllium synthesized in stars is short-lived, it is a relatively rare element in both the universe and in the crust of the Earth. It is a divalent element which occurs naturally only in combination with other elements in minerals. Notable gemstones which contain beryllium include beryl (aquamarine, emerald) and chrysoberyl. As a free element it is a steel-gray, strong, lightweight and brittle alkaline earth metal.

Beryllium increases hardness and resistance to corrosion when alloyed to aluminium, cobalt, copper (notably beryllium copper), iron and nickel. In structural applications, high flexural rigidity, thermal stability, thermal conductivity and low density (1.85 times that of water) make beryllium a quality aerospace material for high-speed aircraft, missiles, space vehicles and communication satellites. Because of its low density and atomic mass, beryllium is relatively transparent to X-rays and other forms of ionizing radiation; therefore, it is the most common window material for X-ray equipment and in particle physics experiments. The high thermal conductivities of beryllium and beryllium oxide have led to their use in heat transport and heat sinking applications.

The commercial use of beryllium metal presents technical challenges due to the toxicity (especially by inhalation) of beryllium-containing dusts. Beryllium is corrosive to tissue, and can cause a chronic life-threatening allergic disease called berylliosis in some people. The element is not known to be necessary or useful for either plant or animal life.

Read more about BerylliumProduction, Chemical Properties, History, Applications, Precautions

Other articles related to "beryllium":

Al Be Met
... AlBeMet is the trade name of the Materion Brush Beryllium Composites (formerly known as Brush Wellman) company for a beryllium and aluminium composite material derived by a powder metallurgy process ... Each powder particle contains aluminium between beryllium dendrites producing a uniform microstructure ... Since beryllium is the second least dense elemental metal, these alloys are significantly less dense than aluminium ...
Dayton Project
... It was composed of alternating layers of polonium-210 (Po-210) and beryllium separated by gold foil ... to ensure that during the implosion of the bomb core, the polonium and beryllium mixed ... elements mixed, alpha particles emitted by the polonium were absorbed by the beryllium causing it to emit neutrons ...
Beryllium Bromide - Reactions
... Beryllium bromide can be prepared by reacting beryllium metal with elemental bromine at temperatures of 500°C to 700°C Be + Br2 → BeBr2 Beryllium bromide is also formed when reacting ...
Beryllium - Precautions
... Approximately 35 micrograms of beryllium is found in the human body, but this amount is not considered harmful ... Beryllium is chemically similar to magnesium and therefore can displace it from enzymes, which causes them to malfunction ... granulomatous disease caused by inhalation of dust or fumes contaminated with beryllium either large amounts over a short time or small amounts over a long time can lead to ...
Modulated Neutron Initiator - Design - Flower
... tantalum sphere surrounded by uranium shell with embedded beryllium pellets ... According to other sources, the design was yet more similar to the Urchin, with a beryllium shell shaped to create beryllium jets upon implosion ...