Synthesis and crystal structure of cyanate sodalite |Na8(OCN)2|[Al6Si6O24]

Buhl, Josef‐Christian; Gesing, Th.M.; Kerkamm, I.; Gurris, Ch.

doi:10.1016/j.micromeso.2003.07.004

Cited by 29 publications

(11 citation statements)

References 19 publications

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“…Sodalites are microporous tectosilicates of the general composition Na 8 [AlSiO 4 ] 6 (X) 2 , where X is a monovalent guest anion in the mineral sodalite. Different synthesis experiments have been carried out ever since in making sodalites with a variety of different compositions . An interesting member of the sodalite family is the hydrophilic sodalite with low Si/Al ratio (hydroxy sodalite).…”

Section: Introductionmentioning

confidence: 99%

Synthesis of nanostructure hydroxy sodalite composite membranes via hydrothermal method: support surface modification and synthesis method effects

Kalantari

Vaezi

Yadollahi

et al. 2014

Asia-Pacific J Chem Eng

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Multilayer hydroxy sodalite zeolite membranes were synthesized on the outer surface of support with and without modification via in situ and secondary growth hydrothermal synthesis methods. The synthesized zeolite membranes were characterized by X-ray diffraction, scanning electron microscopy, and single gas (H 2 , N 2 , and n-pentane) permeation measurements at different pressure differences. The membranes synthesized by secondary growth method on the modified support were found to be highly intergrown, but the permeation results for hydrogen and n-pentane at a temperature of 323 K were not repeatable, which can be related to the weak interaction between zeolite layer and substrate. High performance hydroxy sodalite zeolite membrane was successfully formed on a nonmodified α-Al 2 O 3 support by in situ hydrothermal synthesis method. No permeance of n-pentane was measured for this membrane at 323 K and 2 bar so that infinite permselectivity of H 2 /n-C 5 H 12 could be obtained for the four-layer synthesized membrane on the nonmodified support, verifying the synthesis of a good quality hydroxy sodalite zeolite membrane. Figure 10. Scanning electron microscope (SEM) micrographs of surface (left side) and cross-section (right side) of the synthesized sodalite membrane layers on the nonmodified support; (a) monolayer, (b) two-layer by in situ method, (c) two-layer by secondary growth, and (d) three-layer by in situ methods. This figure is available in colour online at www.apjChemEng.com.

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Section: Introductionmentioning

confidence: 99%

Synthesis of nanostructure hydroxy sodalite composite membranes via hydrothermal method: support surface modification and synthesis method effects

Kalantari

Vaezi

Yadollahi

et al. 2014

Asia-Pacific J Chem Eng

View full text Add to dashboard Cite

show abstract

“…8, 10) but were always accompanied by larger amounts of additional phases. In general the formation of NaGaGeO 4 was always observed and could not be prevented (see also Table 1,No. 8,10).…”

Section: Hydrothermal Synthesismentioning

confidence: 99%

“…Additionally, long synthesis times with higher solution volumes trigger the crystallization of an unknown phase ( Table 1, No. 5,8,11). Whereas using NaGaGeO 4 glass leads to the formation of basic-hydro-sodalite but counters the crystalline BER byproducts ( Table 1, No.…”

Section: Hydrothermal Synthesismentioning

confidence: 99%

“…The cubic framework structure, arising from the [4 6 6 8 ] window connectivity, was first reported by Jaeger [6] for the nosean structure in 1929. One year later Pauling [1] reported on the crystal structure of chloride sodalite, |Na 8 Cl 2 |[AlSiO 4 ] 6 , 1967 validated by Löns and Schulz [2]. In most cases each b-cage contains an anion complex [M 4 X] 3+ (M, X: monovalent cation and anion, respectively) with the anion in the central position of the cage [1][2][3][4][5][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…One year later Pauling [1] reported on the crystal structure of chloride sodalite, |Na 8 Cl 2 |[AlSiO 4 ] 6 , 1967 validated by Löns and Schulz [2]. In most cases each b-cage contains an anion complex [M 4 X] 3+ (M, X: monovalent cation and anion, respectively) with the anion in the central position of the cage [1][2][3][4][5][7][8][9]. One of the most striking structural features of sodalite is the tilting mechanism, which enables the framework to adapt itself to the size of various guest anions (templates) by tetrahedra rotation around their 4 axes [7].…”

Section: Introductionmentioning

confidence: 99%

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