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Topic: Beryllium aluminate


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In the News (Mon 28 May 12)

  
  beryllium
Beryllium is resistant to corrosion; weight for weight, it is stronger than steel, and because of its low density (about 1/3 that of aluminum) it has found extensive use in the aerospace industry.
Because beryllium resists attack by liquid sodium metal, it is employed in cooling systems of nuclear reactors that use liquid sodium as the heat-transfer material; because it is a good reflector and absorber of neutrons, it is also used as a shield and as a moderator in nuclear reactors.
Beryllium may be prepared by electrolysis of its fused salts; it is prepared commercially by reduction of the fluoride with magnesium metal.
www.infoplease.com /ce6/sci/A0807284.html   (588 words)

  
 STONES, PRECIOUS in the Bible Encyclopedia - ISBE (Bible History Online)
It is the carbunculus of Pliny's time, and probably included the oriental ruby (corundum, alumina), the balas ruby (spinel, aluminate of magnesium), the almandine (a kind of garnet, alumino-silicate of iron) and pyrope (another kind of garnet, alumino-silicate of magnesium) of the present day.
The stone may have been a yellowish-green plasma (chalcedony, crypto-crystalline silica) or, as suggested by King, pale chrysoberyl (aluminate of beryllium); it is not the chrysoprase of the present day, which is an apple-green chalcedony (colored by nickel).
Chrysolite, chrysolyte: "chrysolite" in Ezek 28:13, the King James Version margin translation of Hebrew tarshish; Rev 21:20, the Revised Version (British and American) translation of Greek chrusolithos; "chrysolyte" in Rev 21:20, the King James Version translation of Greek chrusolithos.
www.bible-history.com /isbe/S/STONES,+PRECIOUS   (5946 words)

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