Leucite
Chemical compound
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Leucite is a rock-forming mineral of the feldspathoid group, silica-undersaturated and composed of potassium and aluminium tectosilicate KAlSi₂O₆. Crystals have the form of cubic icositetrahedra but, as first observed by Sir David Brewster in... Wikipedia
IMA symbol: Lct
Crystal system: Tetragonal
Density: 2.47
Cleavage: Poor on
Color: White to grey
Crystal class: Dipyramidal (4/m); (same H-M symbol)
Crystal habit: Commonly as euhedral, pseudocubic crystals; rarely granular, massive