phillipsite


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Related to phillipsite: chabazite, zeolite

phillipsite

[′fil·əp‚sīt]
(mineralogy)
(K2,Na2CA)Al2Si4O12·H2O A white or reddish zeolite mineral crystallizing in the orthorhombic system; occurs in complex fibrous crystals, which make up a large part of the red-clay sediments in the Pacific Ocean.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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No regional zoning of zeolite assemblages was apparent in this study Figure 8 shows that the zoning sequence and textural evidence suggest the following crystallisation sequence: first K-rich clay (nontronite) followed by K-rich mica (celadonite), carbonate (calcite), cryptocrystalline silica (e g chalcedony), then thomsonite followed by chabazite, analcime, phillipsite and wairakite, and natrolite, laumontite, and stilbite-type minerals (stilbite and stellerite) Zeolites' stability ields are known from modern hydrothermal systems (Kristmannsdottir and Tomasson, 1978) and the observed sequence in the samples studied here conformed to a progressive decrease in temperature favouring hydrothermal system hydration.
Figure 3 shows the phillipsite morphology and the XRD powder diffraction profiles from montmorillonite alteration.
Incrustation of phillipsite-Ca and smectite on gismondine results from possible chemical interaction between gismon-dine, phillipsite and residual solution.
Robie, Thermodynamic Properties of Zeolites; Low- Temperature Heat Capacities and Thermodynamic Functions for Phillipsite and Clinoptilolite; Estimates of the Thermochemical Properties of Zeolitic Water at Low Temperature, Am.
Using the FJPZ50 sample as starting material, a progressive loss of its amorphous character turned it into a synthesis product characterised by the appearance of relative poorly crystalline phillipsite only after 96 hours.
ER Natrojarosite VR VR Natrolite VR VR Olivine group VR C Paratacamite ER ER Phillipsite series ER ER Phlogopite VR ER VR Pseudorutile VR VR VR Pyrite C C C C C C Pyrochlore VR ER?
The best, with sharp, lustrous crystals up to 3 mm, were collected at the beginning of the 1990's in braunite veins, associated with carbonates, barite and, in places, phillipsite.
A group of us speculated as to whether the unknown was one species or another; suggestions included leifite, nenadkevichite, apatite, dawsonite, natrolite, phillipsite, strontianite, and aragonite.
The X-ray powder diffraction pattern is similar to that of phillipsite. The bladed crystals are well-formed, and appear to have monoclinic or triclinic symmetry.
Turning finally to the zeolites, Carati lists just four: scolecite, thomsonite, phillipsite and chabazite.
The type localities for no less than eight of the approximately 49 known zeolites (barrerite, dachiardite, gismondine, merlinoite, montesommaite, phillipsite, pollucite, and willhendersonite) are within its borders.
Phillipsite [(K,Na,Ca).sub.1-2][(Si,Al).sub.8][O.sub.16] [multiplied by] 6[H.sub.2]O