- pseudoleucites
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псевдолейциты
English-Russian dictionary of geology. 2011.
English-Russian dictionary of geology. 2011.
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… … Wikipedia