stishovite

stishovite
/stish"euh vuyt'/, n. Mineral.
a rare polymorph of quartz, SiO2, formed under very high pressure, as by meteorite impact. Cf. coesite.
[1960-65; named after S. M. Stishov, 20th-century Russian mineralogist; see -ITE1]

* * *

      high-pressure, metastable polymorph of silica (SiO2), having a rutile-type tetragonal structure; silicon is in six-fold coordination with oxygen while each oxygen atom is shared with three silicon atoms. Stishovite was first discovered in sandstone that had been converted to glass at Meteor Crater, Ariz., and its occurrence with coesite in many other craters is evidence that it was formed by kinetic energy imparted by large-scale impact on the surrounding rock.

* * *


Universalium. 2010.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • Stishovite — Catégorie IX : silicates[1] Général Numéro CAS …   Wikipédia en Français

  • stishovite — [stish′ə vīt΄] n. [after S. Stishov, Soviet mineralogist who discovered it + ITE1] a very dense, tetragonal form of silica that is colorless and transparent …   English World dictionary

  • Stishovite — Infobox mineral name = Stishovite category = Mineral boxwidth = boxbgcolor = imagesize = caption = formula = Silica (silicon dioxide, SiO2) molweight = color = Clear (if no impurities); also see Varieties habit = system = twinning = cleavage =… …   Wikipedia

  • stishovite — stišovitas statusas T sritis chemija apibrėžtis Didelio tankio, rutilui būdingos struktūros kvarco atmaina, mineralas. atitikmenys: angl. stishovite rus. стишовит …   Chemijos terminų aiškinamasis žodynas

  • stishovite — noun A fine grained mineral, SiO, that is a polymorphic form of quartz formed under very high pressure. Syn: stipoverite …   Wiktionary

  • stishovite — [ stɪʃəvʌɪt] noun a dense form of silica produced by very high pressures, e.g. in meteorite craters. Origin 1960s: from the name of the Russian chemist Sergei M. Stishov + ite1 …   English new terms dictionary

  • stishovite — stish·ov·ite …   English syllables

  • stishovite — ˈstishəˌvīt noun ( s) Etymology: Sergeĭ M. Stishov, 20th century Russ. mineralogist + English ite : a dense tetragonal mineral SiO2 consisting of silicon dioxide that is a polymorph of quartz and that is formed under great pressure …   Useful english dictionary

  • 13778-37-5 — Stishovite Stishovite Catégorie III : oxydes et hydroxydes Formule brute SiO2 Identification Classe cristalline et groupe d espace ditetragonal dipyramidal …   Wikipédia en Français

  • silica mineral — Any of the forms of silicon dioxide (SiO2), including quartz, tridymite, cristobalite, coesite, stishovite, melanophlogite, lechatelierite, and chalcedony. Various kinds of silica minerals have been produced synthetically. * * * Introduction… …   Universalium

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”