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Leucite   Listen
noun
Leucite  n.  
1.
(Min.) A mineral having a glassy fracture, occurring in translucent trapezohedral crystals. It is a silicate of alumina and potash KAlSi2O6. It is found in the volcanic rocks of Italy, especially at Vesuvius.
2.
(Bot.) A leucoplast.





Collaborative International Dictionary of English 0.48


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"Leucite" Quotes from Famous Books



... mountains—situated at such a short distance from each other, and evidently along the same line of fracture in the crust—would be of the same general composition; but such is not the case. In the lava of Vesuvius leucite is an essential, and perhaps the most abundant mineral. It is called by Zirkel Sanidin-Leucitgestein. (See Plate IV.) But in that of Etna this mineral is (as far as I am aware) altogether absent. We have fortunately abundant means of comparison, as the lavas ...
— Volcanoes: Past and Present • Edward Hull


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