Analcime

I have carried out widespread studies on the application of a sensitive and selective preconcentration method for the determination of trace a mounts of nickel by atomic absorption spectrometry. The method is based on soi ption of Cu(II) ions on natural Analcime Zeolit column modified with a new Schiff base 5-((4-hexaoxyphenylazo)-N-(n-hexyl-aminophenyl)) Salicylaldimine and then eluted with O.IM EDTA and determination by EAAS. Various parameters such as the effect of pH, flow rate, type and minimum amount of stripping and the effects of various cationic interferences on the recovery of ions were studied in the present work. 

SOLID PHASE EXTRACTION AND DETERMINATION OF TRACE AMOUNT OF Co + BY MODIFIED ANALCIME ZEOLITE WITH A NEW SCHIFF-BASE LIGAND... 

In this work, a simple, rapid and sensitive Flame Atomic Absolution Spectrometry (FAAS) method has been developed for the determination of trace amount of Co + in vaiious samples after adsoi ption of its complex on modified Analcime using a Schiff base Bis-[(2,2 -dihydroxy)-N,N -diethylen-triamino-l,r-naphtaldimine] by column method in the pH range (4-7) at flow rats 1 ml-minf... 

For example. Date et al. (1983) recognized the following alteration zones in the Fukazawa Kuroko mine area of Hokuroku district from the centre (near the orebody) to the margin (1) sericite-chlorite zone (zone 111 in Figs. 1.20-1.22) characterized by quartz + sericite Mg-rich chlorite (2) montmorillonite zone (zone 11 in Fig. 1.20) characterized by Mg-Ca-type montmorillonite + quartz kaolinite calcite sericite Fe-rich chlorite and (3) zeolite zone (zone 1 in Fig. 1.20) characterized by clinoptilolite + mordenite + Mg-Na-type montmorillonite cristobalite calcite or analcime + Mg-Na-type montmorillonite + quartz calcite sericite Fe-rich chlorite (Fig. 1.20). 

Utada, M., Minato, H., Ishikawa, T. and Yoshizaki, Y. (1974) The alteration zones surrounding Kuroko-type deposits in Nishi-Aizu district, Fukushima 1306cture with emphasis on analcime zone as an indicator in exploration for ore deposits. Mining Geology Special Issue, 6, 291-302. 

Later in the simulations, the zeolite analcime (NaAlSi206 H20) begins to form, largely at the expense of micas, which serve as proxies for clay minerals. In the NaOH flood, the overall reaction (expressed per formula unit of analcime) is,... 

In part because of the open crystal structure and resulting low density characteristic of zeolite minerals, analcime is the most voluminous reaction product in the simulations. 

Fig. 30.4. Changes in the volumes of minerals in the reservoir rock during the simulated alkali floods (Fig. 30.3) of a clastic petroleum reservoir using NaOH, Na2CC>3, and Na2SiC>3 solutions. Minerals that react in small volumes are omitted from the plots. Abbreviations Anal = analcime, Cc = calcite, Daw = dawsonite, Dol = dolomite, Kaol = kaolinite, Muse = muscovite, Parag = paragonite, Phlog = phlogopite, Qtz= quartz, Trid = tridymite.

In the simulations, a significant fraction (about 50% to 80%) of the alkali present in solution is consumed by reactions near the wellbore with the reservoir minerals (as shown in Reaction 30.6 for the NaOH flood), mostly by the production of analcime, paragonite, and dawsonite [NaAlC03(0H)2]. In the clastic reservoir considered, therefore, alkali floods might be expected to cause formation damage (mostly due to the precipitation of zeolites) and to be less effective at increasing oil mobility than in a reservoir where they do not react extensively with the formation. 

In analcime-wairakite series (an interesting exeimple of order/disorder in zeolites), wairakite, the calcium analogous to the sodic analcime has a remarkable order. 

Topology is cubic, with one independent T site. The structure of analcime has been determined and refined for a long time in the cubic space group [50], even if there is evidence of its non-cubic symmetry. 

Mazzi and Galli [51] showed that analcime can have tetragonal or orthorhombic symmetry, whereas wairakite [52] has monoclinic symmetry. 

The different symmetries follow from the different ordering of Al in the tetrahedra, and from the related different charges in extraframework sites. Table 5 emphasises this relationship, showing the variation in the Al-content in T sites in the different samples of the analcime-wairakite series, as a function of the charge in cation sites. Fig. 3 schematizes this relation. 

Table 5 - Ai-fraction in tetrahedral sites, charge in cation sites, and "average long-range order coefficient S, for analcime-wairakite series.

Fig. 3. Schematized relation between the occupancy of M2 site and the Al-content in T1 site, in analcime-wairakite series.

Feng X. and Savin S.M. (1993) Oxygen isotope studies of zeolites stiblite, analcime, heulandite and clinoptilolite, II kinetics and mechanism of isotopic exchange between zeolites and water vapor. Geochim. Cosmochim. Acta 57, 4219-4238. 

BOLES (J.R.) 1971. Synthesis of analcime from natural heulandite and clinoptilolite. Amer. Min., 6, 1724-1734. 

FRANKART (R.) and HERBILLON (A.J.), 1970. Presence et genese d analcime dans les sols sodlques de la Basse Ruzizi (Burundi). Bull. Gr. fr. Argiles XXII, 79-89. 

GUDE (A.J.) and SHEPPARD (R.A.), 1967. Composition and genesis of analcime in the Barstow formation, San Bernardino County, Calif. Clays and Clay Min. lji, 189. 

HIGH (L.R.) and PICARD (M.D.), 1965. Sedimentary petrology and origin of analcime-rich Popo Agie Member, Chugwater (Triassic)formation, West Central Wyoming. Journ. Sed. Petr. 35 49-70. 

SURDAM (R.C.), 1966. Analcime-wairakite mineral series. Abstr. Geol. 

Nearly all silicates contain some sodium, and there are several silicates which contain relatively large quantities—e.g. soda felspar or albite the soda-lime felspars —e.g. labradorite sodalite nepheline analcime lapis lazuli etc. 

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