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Topic: Kalsilite

Related Topics

Kernite

Keilhauite

Kainite

Kamacite

Gabbro

Kobellite

Kyanite

Kogarkoite

Kaolinite

Kieserite

Gneiss

List of minerals

Gemstone

	Probert Encyclopaedia: Rocks and Minerals (K) (Site not responding. Last check: 2007-11-04)
		Kalicine is native potassium bicarbonate occuring as a white crystalline mineral.
		Kalsilite is a rare hexagonal silicate of potassium and aluminium found in some lavas.
		Kamacite is an alloy of iron and nickel occuring in meteorites as bar-shaped masses.
	www.probertencyclopaedia.com /HB.HTM (646 words)

	THERMAL EXPANSION OF NEPHELINE - KALSILITE CRYSTALLINE SOLUTIONS (Site not responding. Last check: 2007-11-04)
		For pure kalsilite the c unit-cell dimension steadily decreases with temperature, whereas for sodium-bearing kalsilite, c first increases then eventually decreases with temperature.
		Thus, although different kalsilite members have systematically distinct values of c at room temperature, all members converge to a common value of c at high temperature.
		This difference in behavior is related to the structures of nepheline - kalsilite minerals, which are stuffed derivatives of tridymite in which large channel cations play a different role than is the case for alkali feldspars.
	gsa.confex.com /gsa/2002AM/finalprogram/abstract_43210.htm (452 words)

	THE THERMAL EXPANSION OF ULTRA-SILICIC NEPHELINE — KALSILITE CRYSTALLINE SOLUTIONS
		At the potassic end of this Si-rich series both pure-K and Na-bearing kalsilite samples display coefficients of thermal expansion that are lower than those of the nepheline specimens.
		When plotted against molar excess Si (or mole fraction vacancies in the alkali site), the coefficients of thermal expansion for nepheline and kalsilite converge toward one another as Si increases, apparently approaching the thermal expansion coefficient for hexagonal tridymite (derived from the high-temperature X-ray data of de Dombal and Carpenter, European Journal of Mineralogy, 1993).
		The contrasting expansion behavior of nepheline and kalsilite relative to excess Si must be related to differences in the details of their structures, in particular alkali-site configuration and behavior, as well as the structural location of the excess Si and vacancies.
	gsa.confex.com /gsa/2004AM/finalprogram/abstract_78015.htm (422 words)

	Alphabetical (Site not responding. Last check: 2007-11-04)
		Kalsilite is isostructural with nepheline, with which it forms a complete solid solution series above 1000°C. At lower temperatures, kalsilite exsolves from nepheline forming finely intergrown exsolution lamellae, analogous to that in the alkali feldspars.
		Kalsilite is polymorphous with kaliophilite, panunzite, and trikalsilite.
		Historical Connection: Kalsilite is also formed as an alteration product of blast furnace brick when it reacts with potash in cement kilns (the bricks also react with soda to form albite).
	www.georoots.org /term_page.asp?terminit=k (4625 words)

	Abstracts of the main papers
		The rock types range from kalsilite leucite olivine melilitite lavas and subvolcanic intrusions to carbonatite, phonolite and calcitic melilitite pyroclasts.
		melilite, leucite and kalsilite, with mantle xenolithic/xenocrystic debris and carbonatite phases.
		Based on bulk rock chemistry it is classified as a kamafugite, closely approaching the composition of ULUD kamafugites, according to Sahama's (1974) criteria.
	www.unich.it /~stoppa/recen.htm (8685 words)

	IngentaConnect Thermal expansion of nepheline - kalsilite crystalline solutions (Site not responding. Last check: 2007-11-04)
		Nepheline expansion is relatively high and little affected by composition, whereas kalsilite expansion is lower but affected to a significant degree by K:Na ratio.
		Once the structure changes to that of kalsilite, with its single alkali site, an increase in content of the larger K ion limits the degree to which kalsilite can expand.
		kalsilite, the number and geometry of their alkali sites, the occupancies of those sites, and the flexibility inherent in each structure that allows for adjustment with increasing temperature.
	ingentaconnect.com /content/minsoc/mag/2003/00000067/00000003/art00007 (263 words)

	Geology and Geophysics, 2001, V 42, N 1.
		Petrographic characteristics of melilitic and monticellite-bearing rocks, their mineralogy, and composition of minerals, including rare ones (kalsilite, combeite, rankinite, larnite, and djerfisherite), are reported.
		During crystallization and fractionation of melilite, the contents of Si and Al in the melt strongly increased, the content of Fe sharply decreased, the amount of Na in the total of alkalies diminished and that of K grew, and the quantities of Ca and Mg remained the same.
		Subsequently the high content of K favored binding of Al-Si radicals into molecules of phlogopite and kalsilite and crystallization of djerfisherite under reducing conditions.
	library.iem.ac.ru /geo-geop/9-4201.html (2162 words)

	Rheolithoids
		In the magma chambers, 5-40 km under the surface, native rocks are broken and comminuted, melted and changed in a high energy environment.
		Organised structures have evolved from complicated interwoven silicaeous minerals such as kalsilite and melilite, together with impurities of, for instance, germanium and selenium in the matrix minerals resulting in a rheolithic self replicating life form.
		The core of a Rheolithoid is a fine-grained nucleus of interwoven minerals, apparently related to a vortex crystal formation, but with a consistent asymmetrical organisation that is recognisably similar from one individual to another.
	www.orionsarm.com /xenos/Rheolithoids.html (400 words)

	LookSmart - Directory - Guides to Kalsilite (Site not responding. Last check: 2007-11-04)
		Retrieve the formula, crystal system, and the Strunz number for kalsilite, a mineral found in Uganda.
		Shows an image of kalsilite, its mineral classification, crystallography, physical and chemical properties, and its relationship to other species.
		Outlines the mineral classification, optical and physical properties, and the crystallography of kalsilite.
	www.calbearssearch.com /p/browse/us1/us317914/us263953/us330812/us553452/us10180859/us10178646/us10184258 (161 words)

	Heat capacity of wadeite-type K2Si4O9 and the pressure-induced stable decomposition of K-feldspar (Site not responding. Last check: 2007-11-04)
		The room-temperature compressibilities of kalsilite and leucite, hitherto unknown, have been measured as well.
		The data, fitted to the Murnaghan equation of state, gave Ko = 58.6 GPa, K'o = 0.1 for kalsilite and Ko = 45 GPa, K'o = 5.7 for
		The phase diagram, generated from our internally consistent thermodynamic dataset, shows that for all probable P-T trajectories in the subduction regime, the stable pressure-induced decomposition of K-feldspar will produce coesite + kalsilite rather than coesite + kyanite + K
	www.gfz-potsdam.de /pb4/pg1/people/wunderabstracts/wunder-abs16.html (309 words)

	[No title]
		Aegirine, diopside, garnet grp., kalsilite, lepidomelane, microcline, nepheline, orthoclase.
		Amphibole grp., apatite grp., biotite, chromite, diopside, feldspar grp., kalsilite, leucite, magnetite, muscovite, nepheline, olivine, phlogopite, richterite, titanite, tremolite.
		Albite, ankerite, apatite grp., baddeleyite, barite, bastnaesite, biotite, burbankite, calcite, cancrinite, chondrodite, diopside, dolomite, feldspar grp., forsterite, galena, huanghoite, kalsilite, magnetite, nepheline, phlogopite, pyrochlore, pyroxene grp., parisite, riebeckite, sphalerite, strontianite, witherite, zircon, zirconolite.
	www.koeln.netsurf.de /~w.steffens/aldan.htm (456 words)

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