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EGIRINA [1 record]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2012-01-04

English

Subject field(s)
  • Mineralogy
DEF

A brown or green mineral of the clinopyroxene group occurring in alkali-rich igneous rocks.

OBS

When the composition [of acmite] varies due to ionic substitution of calcium for sodium and of magnesium and aluminum for ferric iron, the mineral is termed aegirine.

OBS

Compare with "acmite," which is often used synonymously.

French

Domaine(s)
  • Minéralogie
DEF

Pyroxène [...] monoclinique, caractéristique des roches hyperalcalines.

CONT

L'aegyrine est trouvée habituellement dans les roches alcalines, les syénites, les phonolites, etc. Elle se présente en fins cristaux verts.

Spanish

Campo(s) temático(s)
  • Mineralogía
DEF

Silicato de hierro y sodio NaFe(Si2O6), que cristaliza en el sistema monoclínico. Es un mineral verde, del grupo de los piroxenos, que se encuentra en las sienitas nefelínicas y otras rocas eruptivas.

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