Aegirine-augite
IMA number:IMA1988 s.p.Database ID:4919
IMA chemistry
(Ca,Na)(Fe3+,Mg,Fe2+)Si2O6
Valence chemistry
(Ca,Na)(Fe3+,Mg,Fe2+)Si2O6
Классификация
Crystal systems
Моноклинная
Space groups
C2, c
IMA symbol
Aeg-Aug
IMA status
Approved, Redefined
Structural group
Pyroxene
Status notes
Rosenbusch H (1892) Mineralien des monoklinen Krystallsystems. Gruppe der monoklinen Pyroxene. in Mikroskopische Physiographie der Petrographisch Wichtigen Mineralien E.Schweizerbart'sche Verlagshandlung (E. Koch) (Stuttgart) 510-539 Redefined: Morimoto N (1988) Nomenclature of pyroxenes. Mineralogical Magazine 52, 535-550
Country
Russia
Published
1892
Oldest age Ma
2 680
Paragenetic modes
AbioticBioticPrimarySecondaryStage 3a: Earth's earliest Hadean crustPM7 - Ultramafic igneous rocksStage 4a: Earth's earliest continental crustPM19 - Granitic intrusive rocksPM23 - Subaerial alterationPM26 - Hadean detrital mineralsStage 4b: Highly evolved igneous rocksPM35 - Ultra-alkali and agpaitic igneous rocksPM36 - Carbonatites & kimberlitesStage 5: Initiation of plate tectonicsPM39 - High-P metamorphismPM40 - Regional metamorphismStage 10a: Neoproterozoic oxygenation/terrestrial biospherePM51 - Pyrometamorphic minerals