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VIDRIO CUARZO [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2016-01-15

English

Subject field(s)
  • Petrography
  • Tectonics
DEF

A group of extrusive igneous rocks, typically porphyritic and commonly exhibiting flow texture, with phenocrysts of quartz and alkali feldspar in a glassy to cryptocrystalline groundmass.

OBS

liparite: A synonym of rhyolite used by German and Soviet authors. Its name, given by Roth in 1861, is derived from the Lipari Island, in the Tyrrhenian Sea. Not recommended usage; the much more widely used synonym rhyolite has priority by one year.

PHR

Mineralized rhyolite, unmineralized rhyolite.

French

Domaine(s)
  • Pétrographie
  • Tectonique
DEF

Roche magmatique effusive, fréquemment riche en verre, de teinte claire, à microlites et phénocristaux rares.

OBS

Sa structure est fluidale, plus ou moins sphérolitique et sa composition correspond à celle des granites.

OBS

liparite : certains auteurs considèrent la liparite comme une variété de rhyolite pauvre en verre, alors que certains autres traitent ce terme comme synonyme.

PHR

Rhyolite minéralisée, rhyolite non minéralisée.

Spanish

Campo(s) temático(s)
  • Petrografía
  • Tectónica
DEF

Roca volcánica, subalcalina o alcalina, ácida, rica en vidrio y con cristales de cuarzo, feldespato alcalino y biotita y con textura fluidal [...] con frecuencia tiene plagioclasa y anfíbol.

OBS

liparita: de isla de Lipari, Italia.

Save record 1

Record 2 2011-09-27

English

Subject field(s)
  • Types of Glass
  • Optics
DEF

A translucent or transparent vitreous material consisting almost entirely of silica.

CONT

When fused silica glass [is] intended for optical purposes the raw material used is rock crystal rather than quartz sand.

French

Domaine(s)
  • Sortes de verre
  • Optique
DEF

Verre obtenu à partir du quartz fondu. (Le verre de silice a le plus faible coefficient de dilatation des corps communs, et il est transparent aux rayons ultraviolets).

OBS

Le verre de silice sert à la fabrication des fibres optiques.

CONT

Une des variétés des verres de silice, connues sous le nom de Vycor (USA. c 2), est obtenue par l'attaque chimique d'un de ses composants, le borate de soude par l'acide chlorhydrique.

Spanish

Campo(s) temático(s)
  • Tipos de vidrio
  • Óptica
CONT

Sílice [...] Por fusión da lugar a un material amorfo(vidrio cuarzo), que posee el más bajo coeficiente de dilatación conocido.

Save record 2

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