Min. [f. Adula name of a mountain in Switzerland.] A variety of Orthoclase.
1798. Greville, Corundum, in Phil. Trans., LXXXVIII. 412. The texture of the matrix appears sometimes like adularia, and confusedly crystallized.
1850. C. Daubeny, Atom. Theory, xii. (ed. 2), 416. In glassy felspar … there is more soda than in orthoclase and adularia, the minerals usually found in granite.
