orthoclase feldspar
101Sanidine — is the high temperature form of potassium feldspar (K,Na)(Si,Al)4O8. [Mineral Handbook http://www.minsocam.org/msa/Handbook/Sanidine.PDF ] Sanidine most typically occurs in felsic volcanic rocks such as obsidian, rhyolite and trachyte. Sanidine… …
102Ceramic flux — A ceramic flux functions by promoting glass formation in clay bodies and glazes. Fluxes are used in glazes to lower the high melting point of silica. The most commonly used fluxes in a ceramic glaze are lead, boric, soda, potassium, lithium,… …
103exsolution — /eks seuh looh sheuhn/, n. Mineral. the process of exsolving. [ < L exsolution (s. of exsolutio). See EX 1, SOLUTION] * * * ▪ chemistry in mineralogy, process through which an initially homogeneous solid solution separates into at least two …
104charnockite — ▪ rock any member of a series of metamorphic rocks with variable chemical composition, first described from the state of Tamil Nadu in southern India and named for Job Charnock. The term is often limited to the characteristic orthopyroxene… …
105hyalophane — hīˈaləˌfān noun ( s) Etymology: German hyalophan, from hyal + phan phane : a mineral BaAl2Si2O8 consisting of a monoclinic feldspar isomorphous with and resembling adularia * * * /huy al euh fayn , huy euh leuh /, n. Mineral. a variety of… …
106Adularia — Ad u*la ri*a, n. [From Adula, a mountain peak in Switzerland, where fine specimens are found.] (Min.) A transparent or translucent variety of common feldspar, or orthoclase, which often shows pearly opalescent reflections; called by lapidaries… …
107Glassy — Glass y, a. 1. Made of glass; vitreous; as, a glassy substance. Bacon. [1913 Webster] 2. Resembling glass in its properties, as in smoothness, brittleness, or transparency; as, a glassy stream; a glassy surface; the glassy deep. [1913 Webster] 3 …
108granite — Syenite Sy e*nite, n. [L. Syenites (sc. lapis), from Syene, Gr. ?.] (Min.) (a) Orig., a rock composed of quartz, hornblende, and feldspar, anciently quarried at Syene, in Upper Egypt, and now called {granite}. (b) A granular, crystalline, ingeous …
109leucite syenite — Syenite Sy e*nite, n. [L. Syenites (sc. lapis), from Syene, Gr. ?.] (Min.) (a) Orig., a rock composed of quartz, hornblende, and feldspar, anciently quarried at Syene, in Upper Egypt, and now called {granite}. (b) A granular, crystalline, ingeous …
110nephelite elaeolite syenite — Syenite Sy e*nite, n. [L. Syenites (sc. lapis), from Syene, Gr. ?.] (Min.) (a) Orig., a rock composed of quartz, hornblende, and feldspar, anciently quarried at Syene, in Upper Egypt, and now called {granite}. (b) A granular, crystalline, ingeous …
