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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 the charge. Aluminium also substitutes for the iron(III). It is also known as acmite, which is a fibrous, green-colored variety.

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Mineralogy Database Dictionary

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General Information:
 Chemical Formula:
(Molecular Weight = 231.00 gm)
Sodium 9.95 % Na
Iron 24.18 % Fe
Silicon 24.32 % Si
Oxygen 41.56 % 
 Empirical Formula:
Sodium rich igneous nepheline syenites.
 IMA Status:
Approved IMA 1987
TL: Norway, Buskerud, Kongsberg. Magnet Cove, Hot Spring County, Arkansas.
 Name Origin:
Named after the Teutonic god of the sea. Acmite is from the Greek "point" in allusion to the pointed crystals.
Physical Properties:
[???] Distinct, [???] Distinct
green, greenish black, reddish brown, or black.
3.5 - 3.54, Average = 3.52
Subtransparent to translucent to opaque
Acicular - Occurs as needle-like crystals., ,
6-6.5 - Orthoclase-Pyrite
Vitreous - Resinous
yellowish gray
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Dizionario inglese-italiano 1.0.012

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Glosarium Pusat Bahasa Depdiknas Indonesia

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B: (Kimia) aegirina

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