1) Iron mineral 2) Monoclinic mineral
Found on
https://www.crosswordclues.com/clue/aegirine
Aegirine is a member of the clinopyroxene group of inosilicates. Aegirine is the sodium endmember of the aegirine-augite series. Aegirine has the chemical formula NaFeSi2O6 in which the iron is present as Fe3+. In the aegirine-augite series the sodium is variably replaced by calcium with iron(II) and magnesium replacing the iron(III) to balance th...
Found on
http://en.wikipedia.org/wiki/Aegirine
a pyroxene mineral, sodium and iron silicate (NaFe+3Si2O6), that is commonly found in alkaline igneous rocks, particularly in syenites and syenite ... [2 related articles]
Found on
http://www.britannica.com/eb/a-z/a/22
(Sodium Iron Silicate) Aegirine , which is listed in some guides as acmite, forms impressive crystals that have become classics among collectors. These tall opaque monument-like crystals that jut majestically out from their host rocks are simply splendid. The steeply inclined pyramid on top of the prismatic crystals is very cha...
Found on
https://www.encyclo.co.uk/local/23719
No exact match found.
