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Augite, also
known as Augurite, is a
common rock-forming
pyroxene mineral with
formula (Ca,Na)(Mg,Fe,Al,Ti)(Si,Al)2O6. The
crystals are
monoclinic and...
- the aegirine–
augite series. It has the
chemical formula NaFeSi2O6, in
which the iron is
present as the ion Fe3+. In the aegirine–
augite series, the sodium...
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north of Igaliku,
there are the
Gardar alkaline pegmatitic intrusions of
augite syenite, gabbro, etc. To the west and
southwest are
Palaeozoic carbonatite...
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Basalt is
usually dark grey to
black in colour, due to a high
content of
augite or
other dark-coloured
pyroxene minerals, but can
exhibit a wide
range of...
-
silica is
present in
greater quantity over
ferromagnesian minerals, such as
augite, hornblende,
enstatite or biotite,
occur rather than olivine.
Unless potash...
- a
miscibility gap
between pigeonite and
augite compositions.
There is an
arbitrary separation between augite and the diopside-hedenbergite (CaMgSi2O6 −...
- in the
Gregorian calendar Aug, the IMA
symbol for the
pyroxene mineral Augite AUG, the most
common start codon,
often encoding the
amino acid methionine...
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large glossy crystals of
augite in a dark grey
matrix made up of
small crystals of
augite and feldspar. This is
unusual as
augite is
usually dull. In central...
-
igneous rocks that are rich in
augite and were
formed from
basaltic magma about 1.3
billion years ago. They
contain augite and
olivine crystals.
Their crystallization...
- accessory. The
missourites are more
mafic and
consist of leucite, olivine,
augite and biotite; the
leucite is
partly fresh partly altered to analcite, and...
