Look up: leucite

1. 
   Leucite
   Leucite has the formulae KAlSi2O6. It has a relative hardness of 6. It is a rather rare mineral occuring only in igneous rocks and usually in recent lavas. Found in rocks where the amount of silica in the magma was not sufficient to form feldspar. It is not found, therefore, in rocks that contain quartz. From the Greek word for 'white'.
   Found on http://www.encyclo.co.uk/nol.php
   
   
2. 
   leucite
   composed of complex silicates of aluminium and alkali or alkaline earth metals; used as flux in the ceramic industry Category: Chemistry
   Found on http://www.mijnwoordenboek.nl/definition
   
   
3. 
   Leucite
   Leu'cite (lū'sīt) noun [ Greek leyko`s white: confer French leucite .] 1. (Min.) A mineral having a glassy fracture, occurring in translucent trapezohedral crystals. It is a silicate of alumina and potash. It is found in the volcanic rocks of Italy, especially at Vesuvius. 2. (Botany) A leucoplast.
   Found on http://www.encyclo.co.uk/webster/L/33
   
   
4. 
   leucite
   1. <chemical> A mineral having a glassy fracture, occurring in translucent trapezohedral crystals. It is a silicate of alumina and potash. It is found in the volcanic rocks of Italy, especially at Vesuvius. ... 2. <botany> A leucoplast. ... Origin: Gr. White: cf. F. Leucite. ... Source: Websters Dictionary ... (01 Mar 1998) ...
   Found on http://www.mondofacto.com/facts/dictiona
   
   
5. 
   Leucite
   `Leucite` is a rock-forming mineral composed of potassium and aluminium tectosilicate K[AlSi2O6]. Crystals have the form of cubic icositetrahedra but, as first observed by Sir David Brewster in 1821, they are not optically isotropic, and are therefore pseudo-cubic. Goniometric measurements made by Gerhard vom Rath in 1873 led him to refer the crystals to the tetragonal system. Optical investigations have since proved the crystals to be still more...
   Found on http://en.wikipedia.org/wiki/Leucite
   
   
6. 
   Leucite
   • (n.) A mineral having a glassy fracture, occurring in translucent trapezohedral crystals. It is a silicate of alumina and potash. It is found in the volcanic rocks of Italy, especially at Vesuvius. • (n.) A leucoplast.
   Found on http://thinkexist.com/dictionary/meaning
   
   
7. 
   leucite
   one of the most important feldspathoid minerals, a potassium aluminosilicate (KAlSi2O6). It occurs only in igneous rocks, particularly ... [2 related articles]
   Found on http://www.britannica.com/eb/a-z/l/39