verneuil process

verneuil process
noun or verneuil method \(ˈ)ver|nər-, -nə̄ē, F vernœœy\
Etymology: after A. V. L. Verneuil, 19th century French mineralogist
: a procedure for growing large crystals (as of sapphire, ruby, spinel, or rutile) by adding the powdered material to the top of a rod the end of which is maintained at or close to the melting point by a flame directed vertically downward upon it

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/verr noy"/; Fr. /verdd nue"yeu/
a process for making synthetic rubies, sapphires, spinels, etc., by the fusion at high temperatures of powdered compounds. Also called flame-fusion process.
[named after A.V.L. Verneuil, 19th-century French mineralogist]

Useful english dictionary. 2012.

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  • Verneuil process — The Verneuil process, also called flame fusion, was the first commercially successful method of manufacturing synthetic gemstones, developed in 1902 by the French chemist Auguste Verneuil. It is primarily used to produce the ruby and sapphire… …   Wikipedia

  • Verneuil process — /verr noy /; Fr. /verdd nue yeu/ a process for making synthetic rubies, sapphires, spinels, etc., by the fusion at high temperatures of powdered compounds. Also called flame fusion process. [named after A.V.L. Verneuil, 19th century French… …   Universalium

  • verneuil method — noun see verneuil process …   Useful english dictionary

  • Auguste Victor Louis Verneuil — (1856 1913) was a French chemist best known for inventing the first commercially viable process for the manufacture of synthetic gemstones. In 1902 he discovered the flame fusion process, today called the Verneuil Process, which remains in use… …   Wikipedia

  • flame-fusion process — /flaym fyooh zheuhn/. See Verneuil process. * * * …   Universalium

  • flame-fusion process — /flaym fyooh zheuhn/. See Verneuil process …   Useful english dictionary

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