Submit

Sunday 11 September 2011

0
Beryllium (Be)

Do you want to share?

Do you like this story?

Discovery Information
Who: Fredrich Wöhler, A. A. Bussy
When: 1798
Where: Germany/France

Name Origin
From the mineral beryl.

Sources
Found mostly in minerals like beryl [AlBe3(Si6O18)] and chrysoberyl (Al2BeO4). Important mining locations are Brazil, the USA, Madagascar, Germany, Czech Republic, Russia and India. Annual production is round 360 tons. Total world-wide reservers are estimate to be around 400 thousand tons.

Abundance
Universe: 0.001 ppm (by weight)
Sun: 0.0001 ppm (by weight)
Carbonaceous meteorite: 0.03 ppm
Earth's Crust: 2.6 ppm
Seawater:
  • Atlantic surface: 8.8 x 10-8 ppm
  • Atlantic deep: 1.7 x 10-7 ppm
  • Pacific surface: 3.5 x 10-8 ppm
  • Pacific deep: 2.2 x 10-7 ppm
Human:
  • 0.4 ppb by weight
  • 0.3 ppb by atoms

Uses
Its ability to absorb large amounts of heat makes it useful in spacecraft, missiles, aircraft, etc. Emeralds are beryl crystals with chromium traces giving them their green colour. Also used in light weight metal alloys, X-ray tube windows, watch springs and sparkless tools. Beryllium oxide (BeO) is useful for many applications that require an excellent heat conductor, with high strength and hardness, with a very high melting point, and that acts as an electrical insulator. Beryllium is also used in the making of gyroscopes, various computer equipment, watch springs and instruments where light-weight, rigidity and dimensional stability are needed.

The James Webb Space Telescope, will have 18 hexagonal beryllium sections for its mirrors. Because the JWST will face a temperature of -240 degrees Celsius (30 kelvins), the mirror is made of beryllium, a material capable of handling extreme cold better than glass. Beryllium contracts and deforms less than glass, and thus remains more uniform, in such temperatures.

History
This element was discovered by Louis Vauquelinin 1798 as the oxide in beryl and in emeralds. Friedrich Wöhler and A. A. Bussy independently isolated the metal in 1828 by reacting potassium and beryllium chloride.

Notes
The speed of sound in beryllium (12,500 m s-1) is greater than in any other element. Beryllium comes from Greek beryllos, beryl. It has also been called Glucinium or Glucinum from the Greek word glykys which means "sweet." Beryllium is found in beryl, chrysoberyl (Al2BeO4) and phenakite (Be2SiO4). Aquamarine and emeralds are precious forms of beryl. It has a high melting point for a light metal and is more elastic than steel. It is used in computer parts, gyroscopes and for construction. Beryllium and its salts are toxic and should be handled with great care. Do not taste it to confirm that it is sweet. Beryllium is an essential constituent of roughly 100 out of about 4000 known minerals.

Hazards
Beryllium and its salts are highly toxic substances and carcinogenic.

Ingin artikel seperti diatas langsung ke Email anda? Silahkan masukan alamat email anda untuk berlangganan.
Privacy guaranteed. We'll never share your info.
feedburner

Dengan memasukan alamat email dibawah ini, berarti anda akan dapat kiriman artikel terbaru dari Tekim ZOne di inbox anda:

0 comments:

Post a Comment

Jejak komentar Anda akan menjadi katalis perbaikan blog ini. Silahkan Anda berkontribusi sebagai katalis tersebut. Terimakasih.

 

About Dodo Pujakesuma

Dodo PujakesumaDodo Pujakesuma, yang baru saja mengenal dunia Blogging. Saat ini dia bekerja di sebuah perusahaan General Construction Contractor and Rental Equipment.

Anda dapat menemukan Dodo Pujakesuma di : Facebook dan menghubunginya di dodo.pujakesuma@yahoo.com
  
Segera konfirmasi email anda agar saya bisa mengirimkan artikel terbaru gratis ke email anda.