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Feldspar The group includes the monoclinic (orthoclastic) species orthoclase or common potash feldspar, and the rare hyalophane or baryta feldspar; also the triclinic species (called in general plagioclase) microcline, like orthoclase a potash feldspar; anorthite or lime feldspar; albite or soda feldspar; also intermediate between the last two species, labradorite, andesine, oligoclase, containing both lime and soda in varying amounts. The feldspars are essential constituents of nearly all crystalline rocks, as granite, gneiss, mica, slate, most kinds of basalt and trachyte, etc. The decomposition of feldspar has yielded a large part of the clay of the soil, also the mineral kaolin, an essential material in the making of fine pottery. Common feldspar is itself largely used for the same purpose. Feldspathic Fele Felicify Felicitate I am alone felicitateShak. Felicitate What a glorious entertainment and pleasure would fill and felicitate his spirit.I. Watts. Every true heart must felicitate itself that its lot is cast in this kingdom.W. Howitt. Syn. See Congratulate. Felicitation Felicitous Felicitous words and images.M. Arnold. Felicity Our own felicity we make or find.Johnson. Finally, after this life, to attain everlasting joy and felicity.Book of Common Prayer. |
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