Aegirine is a member of the clinopyroxene group of inosilicate minerals. It is the sodium endmember of the aegirine–augite series. It has the chemical...

for a mechanism to make up the "missing" positive charge. In jadeite and aegirine this is added by the inclusion of a +3 cation (aluminium and iron(III)...

material in general. Associate minerals include: microcline, nepheline, aegirine, lamprophyllite, lorenzenite, catapleiite, murmanite, arfvedsonite, sodalite...

Crystals of serandite, natrolite, analcime, and aegirine from Mont Saint-Hilaire, Quebec, Canada...

The clinopyroxene is sodic whose composition varies from hedenbergite to aegirine-augite. This mineral eventually presents resorption shape. The reaction...

Rim group, dated to 274,000–170,000 years ago Phonolite lava flows with aegirine phenocrysts, of the Inner Crater group, which represents the last volcanic...

of the mineral. The black spots on some specimens are either augite or aegirine, the latter occurring in almost all charoites since they commonly grow...

Actinolite Acuminite Adamite Adamsite-(Y) Adelite Admontite Adranosite Aegirine Aegirine-augite Aenigmatite Aerinite Aerugite Aeschynite-(Ce) Aeschynite-(Nd)...

(melanite) and aegirine. The abundance of melanite is very unusual in igneous rocks, though some syenites, leucitophyres, and aegirine-felsites resemble...

asbestiform variety crocidolite (blue asbestos). It occurs in association with aegirine, nepheline, albite, arfvedsonite in igneous rocks; with tremolite, ferro-actinolite...

only in the most strongly peralkaline rocks. Mafic minerals may include aegirine, fayalite, aenigmatite, ilmenite, and sodic amphibole (often arfvedsonite...

Sodalite-aegirine-albite pegmatite specimen, Ice River Complex, an intrusion partly in Yoho National Park. Field of view ≈7.1 cm across....

that some of the alkali oxides must be present in sodic pyroxenes such as aegirine or sodic amphibole in addition to in feldspar. The chemistry of volcanic...

(1901–1948) for an occurrence on Iwagi Islet, Japan, where it is found in an aegirine syenite intrusive stock. It is found in a similar environment at Mont Saint-Hilaire...

have been used as gemstones. Such as: Actinolite Nephrite (var.) Adamite Aegirine Afghanite Agrellite Algodonite Alunite Amblygonite Analcime Anatase Andalusite...

Peninsula, Russia. Its mineral association includes nepheline, albite, aegirine, riebeckite, katophorite and quartz. Arfvedsonite was discovered in 1823...

characteristic dark color comes from its concentration of dark pyroxenes such as aegirine and augite. Blairmorite is an analcite-rich variety of phonolite. Nepheline...

natrolite. Other associated minerals include nepheline, titanian andradite, aegirine, microcline, sanidine, albite, calcite, fluorite, ankerite and baryte....

much nepheline with hauyne or nosean. Their pyroxene is principally aegirine or aegirine-augite; some of them are rich in melanite. Microscopic sections of...

commanded by Lt Cmdr Neil Foster RN. As well as collecting samples of the aegirine granite, "rockallite", for later analysis in London, the top of the rock...

astrophyllite is associated with feldspar, mica, titanite, zircon, nepheline, and aegirine. Common impurities include magnesium, aluminium, calcium, zirconium, niobium...

veins within metamorphosed dolomite and slate. It occurs associated with aegirine, riebeckite, barite, fluorite, albite, phlogopite and magnetite. The IMA...

characteristic of the phonolites may also be found in some trachytes; thus aegirine or aegirine augite forms outgrowths on diopside crystals, and riebeckite may...

Catapleiite-Analcime-Aegirine...

yielded a Late Cretaceous age of 81 ± 3 Ma, which predates the 52 ± 9 Ma aegirine granite of Rockall Island and reveals an earlier, previously unsuspected...

named for Neptune, Roman god of the sea because of its association with aegirine from Àgir, the Scandinavian sea-god. The Gemological Institute of America...

naturally occurring antiperovskite. Common associates of arctite include aegirine, natisite, lomonosovite, umbite and thenardite. Mineral Handbook Warr,...

intrusives and in nepheline syenite pegmatites. It occurs associated with aegirine, sodalite, nepheline, neptunite, lamprophyllite, pectolite, serandite,...

(Ca,Na)(Mg,Fe,Al)(Si,Al)2O6 Sodium pyroxene series Jadeite – NaAlSi2O6 Aegirine (or acmite) – NaFeIIISi2O6 Spodumene – LiAlSi2O6 Pyroxferroite - (Fe,Ca)SiO3...

characteristically found in carbonatites. Associated minerals include zircon, aegirine, apatite, perovskite and columbite. It was first described in 1826 for...