potassium feldspar


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potassium feldspar

n.
Any of several varieties of alkali feldspar, including sanidine, orthoclase, microcline, and adularia, that contain a high proportion of potassium relative to sodium. Also called K-feldspar, K-spar.
References in periodicals archive ?
The pegmatite fields of San Luis have an important past record of producing mica, beryl, spodumene, tantalite (tantalum oxide), columbite (niobium oxide), and recently potassium feldspar, albite and quartz.
Kaolinite generally is formed during the weathering and the alteration of Potassium feldspar which is an essential ingredient of granite.
Centrex Metals will use the technology at its Oxley potash project to become the first commercial and cost competitive manufacturer of bulk potassium chloride fertilizer from potassium feldspar ore.
from the soils, in the modified medium containing phosphate and potassium minerals like kaolinite and potassium feldspar.
While crazing (a series of lines in the fired glaze surface) is technically a glaze defect, in this instance it reveals a high degree of similarity in the three feldspars, an indication that one potassium feldspar may be substituted for another in glaze formulas.
Feldspars: This category included single crystals of K-feldspar, microcline and plagioclase, as well as potassium feldspar and plagioclase included in intraclasts, phaneritic rock fragments, and sedimentary rock fragments (meta-arenites).
The topics include developing a new type of column magnetic separator, flotation mechanisms to separate potassium feldspar from quartz with an anion and cation mixed collector, the effect of bauxite moisture on high-pressure grinding roller crushing, preconcentration and separation capabilities of modified bentonite using dithizone for trace cobalt in water, synthetic silicone emulsion, and a sedimentation experiment on fine white slime water.
Especially noteworthy in thin section is the scarcity of potassium feldspar in any of the igneous clast types in this section.
The trend follows the mixing line representing the removals of alkalies and Ca in solution during the breakdown of first plagioclase and potassium feldspar and ferromagnesium silicates.
The rock is composed of quartz, potassium feldspar, plagioclase, and biotite and its structure is evenly grainy.
They are LREE-enriched peralkalic syenites and alkalic syenitoids with potassium feldspar, plagioclase, quartz, biotite and aegirine-augite as their common minerals.
Metallurgical bench testing to date has also revealed other potential economic targets, including cosmetic grade mica, silica chloride, aluminum chloride and rubidium enriched potassium feldspar.

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