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Illite, also
called hydromica or hydromuscovite, is a
group of
closely related non-expanding clay minerals.
Illite is a
secondary mineral precipitate,...
- (especially in mid-to
early Paleozoic shales)
illites predominate. The
transformation of
smectite to
illite produces silica, sodium, calcium, magnesium...
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Illite crystallinity is a
technique used to
classify low-grade
metamorphic activity in
pelitic rocks.
Determining the "
illite crystallinity index" allows...
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presence of
smectite clay
minerals on the
planet Mars.
Illite group which includes the clay-micas.
Illite is the only
common mineral in this group. Chlorite...
-
interest in the
release of
water from
illite clays in
subducting sediments. The
conversion of
smectite to
illite (illitization) in
subduction zones is...
- when the
dominant clay
species is
illite (a non-swelling clay). However, in pure clay mineralogy, the term
illite is more
appropriate than "K-bentonite"...
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Weathering of the same kind of rock
under alkaline conditions produces illite.
Smectite forms by
weathering of
igneous rock
under alkaline conditions...
- 15–30
Clays — over 30
Sesquioxides — 0–3
Kaolinite — 3–15
Illite — 25–40
Montmorillonite — 60–100
Vermiculite (similar to
illite) — 80–150
Humus — 100–300...
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varies with source. It
often occurs intermixed with chlorite, muscovite,
illite, cookeite, and kaolinite.
Montmorillonite can be
concentrated and transformed...
-
kaolinite decreases,
while the
proportion of
other clay
minerals such as
illite (in
cooler climates) or
smectite (in
drier climates) increases. Such climatically...
