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X-Ray Powder Pattern of Stilbite (Desmine) and Heulandite
The Journal of the Geological Society of Japan, 1953 KOIZUMI, MITSUE, KIRIYAMA, RYOITI
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Rehydration of heulandite and stilbite
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science, 19881. Stilbite and heulandite begin to undergo sintering upon heating in vacuum at 200 ± 5°C and undergo about 80% dehydration. 2. The rehydration energy (heat of immersion in water) of stilbite and heulandite reach maximal values of 350 ± 15 and 215 ± 15 J/g after pumping at 230 ± 20 and 200 ± 20°C, respectively.
T. M. Guliev +3 more
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Comparative study of natural calcium stilbite and magnesium exchanged stilbite for ethanol sensing
Journal of Porous Materials, 2012Natural stilbite (Ca-stilbite) zeolites have been collected from the queries near Pashan area, Pune, Maharashtra, India. The calcium ions in the Ca-stilbite structure are partially exchanged by magnesium ions using ion exchange process. The Ca-stilbite and Mg- stilbite samples are characterized by XRD, EDS, FTIR and TG/DTA techniques and are used as ...
Megha P. Mahabole +3 more
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The crystal chemistry of stilbites and stellerites
Bulletin de Minéralogie, 1978A total of 65 samples of stilbite and stellerite have been chemically analyzed and X-rayed. By using F-unit cell also for monoclinic stilbites, the lattice constants ranges are : a = 13.570-13.605 Â, b = 18. 198-18.270 Â, c = 17.823-17.863 Â for stellerites, and a = 13.595-13.657 À, b = 18. 197-18.309 Â, c = 17.775-17.842 Â, β = 90.
Passaglia, Elio +3 more
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Synthesis of stilbite by the hydrothermal method
Journal of Physics D: Applied Physics, 1998The effect of temperature on stilbite synthesis was investigated systematically in the temperature range 80-C by hydrothermal treatment of artificial glasses of the same composition (1O-8CaO-9O) at 1 kbar O pressure. The zeolite was always formed with monoclinic symmetry (, a = 13.61 A, b = 18.24 A, c = 11.27 A and ; or , a = 13.61 A, b = 18.24 A, c ...
H Ghobarkar, O Schäf
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Thermodynamic properties of the zeolite stilbite
Zeolites, 1990In this study, calorimetric measurements of the molar enthalpy of formation Δ f H 0 m at 298.15 K, molar heat capacity C 0 p,m (and, thus, the molar entropy 7 S 0 m ) from 5 to 350 K, and enthalpy increments H 0 m ( T ) — H 0 m (298.15 K) from 350 to 500 K were performed on a specimen of stilbite characterized by electron ...
D.A. Howell +4 more
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Phase transition at thermal dehydration in stilbite
Journal of Thermal Analysis and Calorimetry, 2011Thermal dehydration of stilbite was investigated by thermogravimetry and in situ X-ray powder diffraction. Sample mass changes continuously over the whole temperature range, with anomaly near 175 °C described in terms of the second-order phase transition with changes in symmetry from F-centered unit cell to A-centered one.
V. A. Drebushchak +2 more
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Thermal behaviour of natural stilbite crystals
Thermochimica Acta, 1982Abstract Observations of the behaviour of natural stilbite crystals on dehydration are reported. Results of TG, DTA, static weight loss measurements, X-ray diffractometric analysis and IR studies are described and interpreted. It is established that the stilbite structure collapses at about 400°C.
M.S. Joshi +3 more
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Thermal decomposition of the natural zeolite stilbite
Zeolites, 1985Abstract Based upon results of differential thermal analysis (d.t.a.) measurements, the natural zeolite, stilbite, from Rožsinka (Moravia, Czechoslovakia) was subjected to isothermal decomposition at temperatures of 20°, 200°, 260°, 470°, 550°, 620°, 770°, 870° and 1000°C.
D. Rykl, F. Pechar
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