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feldspathoid — /feld spa thoyd , fel /, Mineral. adj. 1. Also, feldspathoidal. of or pertaining to a group of minerals similar in chemical composition to certain feldspars except for a lower silica content. n. 2. a mineral of this group, as nepheline. [1895… … Universalium
Feldspathoid — The feldspathoids are a group of tectosilicate minerals which resemble feldspars but have a different structure and much lower silica content. They occur in rare and unusual types of igneous rocks.Foid, contraction of the term feldspathoid, is… … Wikipedia
feldspathoid — feld·spath·oid … English syllables
feldspathoid — feld•spath•oid [[t]ˈfɛld spæˌθɔɪd, ˈfɛl [/t]] adj. 1) mir Also, feld spath•oi′dal. of or pertaining to a group of minerals similar in chemical composition to certain feldspars except for a lower silica content 2) mir a mineral of this group, as… … From formal English to slang
feldspathoid — … Useful english dictionary
nepheline — /nef euh lin/, n. a feldspathoid mineral, essentially sodium aluminum silicate, NaAlSiO4, occurring in alkali rich volcanic rocks. Also, nephelite /nef euh luyt /. [1805 15; < F néphéline, equiv. to néphél ( < Gk nephéle cloud) + ine INE2] * * *… … Universalium
Silicate minerals — ▪ Table Silicate minerals name colour lustre Mohs hardness specific gravity Tectosilicates (three dimensional networks) feldspar (for other examples, see feldspar) orthoclase flesh red, white to pale yellow, red, green vitreous 6–6½ 2.6… … Universalium
Nepheline syenite — of the Intrusive Complex of Tanguá, State of Rio de Janeiro, Brasil (Motoki et al., 2011a) Nephelene syenite is a holocrystalline plutonic rock that consists largely of nepheline and alkali feldspar. The rocks are mostly pale colored, grey or… … Wikipedia
Nosean — crystal group from Ochtendung, Eifel, Germany General Category Sodalite (Feldspathoid) … Wikipedia
analcime — [ə nal′sīt΄ə nal′sīm΄, ə nal′sēm΄] n. 〚< Gr an , not + alkoimos, strong: so named from its weak electricity when rubbed〛 a hard, colorless or white zeolite, NaAlSi2O6·H2O, commonly found in basalts: sometimes called analcite [ə nal′sīt΄] * * *… … Universalium
