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.
References in periodicals archive ?
Alkali feldspars are extensively used as palaeodosimeters for dating Quaternary deposits.
The tunnelling processes in alkali feldspars were separated, and the initial research was carried out by Visocekas et al.
Luminescence chronology of Pleistocene loess deposits from Romania: testing methods of age correction for anomalous fading in alkali feldspars.
Plagioclase dramatically removes Sr at intermediate stages and alkali feldspars sequester Ba and Rb as late-stage trachytes and phonolites form in alkaline magmas.
In the Tallinn laboratory, both quartz and alkali feldspars have been used in the OSL dating.
Different aliquots were dated, and for the control quartz was used parallel to alkali feldspars.
1987, Determining (Al,Si) distribution and strain in alkali feldspars using lattice parameters and diffraction-peak positions: A review, American Mineralogist, v.
1983, Lattice parameters, composition, and Al, Si order in alkali feldspars, in Ribbe, P.
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.
The first OSL stimulation spectra for alkali feldspars were obtained by Hutt et al.