Pyrognomic

Pyrognomic

Pyrognomic materials are easily made incandescent. Minerals and metals commonly glow when heated, but those that are pyrognomic glow at much lower temperatures. Allanite and gadolinite are examples of pyrognomic minerals. The term was introduced by Scheerer in 1840, but the phenomenon had been previously observed by Wollaston and Berzelius.

References

* [http://scienceworld.wolfram.com/chemistry/Pyrognomic.html Weisstein Encyclopedia]


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Look at other dictionaries:

  • pyrognomic — py·ro·gno·mic …   English syllables

  • pyrognomic —   a. easily made incandescent.    ♦ pyrognostic, a. pertaining to, of characteristics produced by, heat, especially as shown by blowpipe analysis …   Dictionary of difficult words

  • pyrognomic — |pīrə|nōmik, rəg|n , näm adjective Etymology: pyr + Greek gnōmon knower, discerner, index + English ic more at gnomon : readily becoming incandescent when heated due to rapid exothermic recrystallization used of metamict minerals (as gadolinite) …   Useful english dictionary

  • Allanite — from the Mt. Isa – Cloncurry area, Queensland, Australia (scale bar 1 inch) General …   Wikipedia

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