Crossword clues for orthoclase
orthoclase
The Collaborative International Dictionary
Orthoclase \Or"tho*clase\, n. [Ortho- + Gr. ? to break.] (Min.) Common or potash feldspar crystallizing in the monoclinic system and having two cleavages at right angles to each other. See Feldspar.
Wiktionary
n. (context mineralogy English) potassium aluminum silicate, potassiumaluminumsilicon3oxygen8, a common feldspar of igneous, plutonic, and metamorphic rocks. Orthoclase is the main feldspar of pegmatite occurrences, where it is most commonly flesh-colored. Orthoclase is used in the ceramic and glass industries and as a decorative gravel.
WordNet
n. a white or colored monoclinic feldspar
Wikipedia
Orthoclase, or orthoclase feldspar ( endmember formula K Al Si O), is an important tectosilicate mineral which forms igneous rock. The name is from the Ancient Greek for "straight fracture," because its two cleavage planes are at right angles to each other. It is a type of potassium feldspar, also known as K-feldspar. The gem known as moonstone (see below) is largely composed of orthoclase.
Usage examples of "orthoclase".
Thariinye adjusted the assembler to produce other silicates such as tourmaline and iolite, orthoclase and microcline.
In the hand specimen it is an apparently pure orthoclase but in the thin section small scattered quartz grains are observed.