alkali feldspar

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alkali feldspar

n.
Any of a series of feldspars, consisting primarily of a mixture of sodium aluminum silicate, NaAlSi3O8, and potassium aluminum silicate, KAlSi3O8.
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References in periodicals archive ?
Alekseyev VA, Medvedeva LS, Prisyagina NI, Meshalkin SS, Balabin Al (1997) Change in the dissolution rates of alkali feldspars as a result of secondary mineral precipitation and approach to equilibrium.
Holdren GR, Speyer PM (1985) pH dependence changes in the rats and stoichiometry of dissolution of an alkali feldspar at room temperature.
Cao et al., "Selective dissolution of alkali feldspars and its effect on Lower Triassic sandy conglomerate reservoirs in the Junggar Basin, northwestern China," Geological Journal, vol.
Alkali feldspars are represented by orthoclase and microcline.
Lee MR, Parsons I (1995) Microtextural controls of weathering of perthitic alkali feldspars. Geochimica et Cosmochimica Acta 59, 4465-4492.
Plagioclase dramatically removes Sr at intermediate stages and alkali feldspars sequester Ba and Rb as late-stage trachytes and phonolites form in alkaline magmas.
and Parsons, I., 1989, Alkali feldspars: ordering rates, phase transformations and behavior diagrams for igneous rocks, Mineralogical Magazine, v.
The study of the efficiency of (optical) response by stimulation means the measurements of the OSL stimulation spectra of quartz and alkali feldspars in the widest possible spectral region.
Phenocrysts of plagioclase and hornblende along with alkali feldspar, quartz and ores are embedded in felsophyric groundmass.