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Leucite (from the Gr**** word
leukos meaning white) is a rock-forming
mineral of the
feldspathoid group, silica-undersaturated and
composed of pot****ium...
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Minerals typical of
lamproites include:
forsteritic olivine; high iron
leucite; titanium-rich aluminium-poor phlogopite; pot****ium- and titanium-rich...
- the
German chemist Martin Klaproth discovered "potash" in the
minerals leucite and lepidolite, and
realized that "potash" was not a
product of
plant growth...
- olivine.
Unless potash is high and
silica relatively low,
leucite will not be present, for
leucite does not
occur with free quartz. Nepheline, likewise, is...
- olivine-rich
melilitites through leucites to nephelinites, containing, in
various proportions mainly the
minerals nepheline,
leucite, melilite, kalsilite, and...
- gl****-based
systems (mainly silica) with fillers,
usually crystalline (typically
leucite or, more recently,
lithium disilicate)
Composition category 3 – crystalline-based...
- 1797. As soon as
Martin Klaproth discovered the
presence of pot****ium in
leucite and lepidolite,
Vauquelin demonstrated that
common alum is a
double salt...
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compared to
augite in
tholeiitic basalt.
Minerals such as
alkali feldspar,
leucite, nepheline, sodalite,
phlogopite mica, and
apatite may be
present in the...
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porphyritic texture.
Mineral content is
usually abundant feldspathoids (
leucite or nepheline), plagioclase, and
lesser alkali feldspar.
Pyroxenes (clinopyroxenes)...
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nepheline syenites have to the phonolites. A
leucite-augite rock,
resembling ijolite except in
containing leucite in
place of nepheline, is
known to occur...
