Zobrazeno 1 - 10
of 123
pro vyhledávání: '"L. Heller-Kallai"'
Autor:
L. Heller-Kallai, Isaak Lapides
Publikováno v:
Physics and Chemistry of Minerals. 42:835-845
Despite extensive research, many aspects of the changes that occur in muscovite on heating remain unclear. This study concentrated on quenched samples, to supplement data obtained in situ by previous investigators, which seemed to suggest that struct
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::25aa7ae4161efb68859ed987f8e64508
https://doi.org/10.1007/s00269-015-0767-4
https://doi.org/10.1007/s00269-015-0767-4
Reactions of metakaolinite with NaOH and colloidal silica — Comparison of different samples (part 2)
Autor:
Isaak Lapides, L. Heller-Kallai
Publikováno v:
Applied Clay Science. 35:94-98
The eight metakaolinites studied in Part 1 were reacted hydrothermally with NaOH and silica gel. After induction periods that were much longer than in the absence of additional silica the main products formed were zeolite A and X in different proport
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a8c2d15ad068202561612a756f407ed8
https://doi.org/10.1016/j.clay.2006.06.007
https://doi.org/10.1016/j.clay.2006.06.007
Autor:
Isaak Lapides, L. Heller-Kallai
Publikováno v:
Applied Clay Science. 35:99-107
Reactions with aqueous sodium hydroxide of eight different kaolinites and of metakaolinites derived from them were studied under hydrothermal conditions. All the kaolinites gave basic hydrosodalite 8:2:2 (8Na+/2OH−/2H2O) as the primary product. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e40373a3ce9037aba170229152496525
https://doi.org/10.1016/j.clay.2006.06.006
https://doi.org/10.1016/j.clay.2006.06.006
Autor:
L. Heller-Kallai, Isaak Lapides
Publikováno v:
Journal of Thermal Analysis and Calorimetry. 71:689-698
It was previously established that kaolinite reacts with K2CO3 on heating to form products of KSiAlO4 composition. In the present study we investigated the solid state reactions with K2CO3 of four kaolinites of different thermal stability. The mixtur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8911b6a3a638a456f6ffe7ece70935b5
https://doi.org/10.1023/a:1023345303488
https://doi.org/10.1023/a:1023345303488
Autor:
Isaak Lapides, L. Heller-Kallai
Publikováno v:
Colloid & Polymer Science. 280:554-561
Aqueous suspensions of Ca or Mn montmorillonite were left to settle in cylinders ranging in diameter, D, from 1.0 to 7.7 cm after magnetic stirring and/or manual tumbling. Changes in height, H, of the interface between the turbid suspension and the c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f00fbe9245e362f274ed119591931237
https://doi.org/10.1007/s00396-002-0656-5
https://doi.org/10.1007/s00396-002-0656-5
Autor:
L. Heller-Kallai
Publikováno v:
Applied Clay Science. 20:27-38
This paper reviews protonation–deprotonation reactions and loss of structural hydroxyls which change the total anionic charge of the layers of dioctahedral smectites. Protons for protonation of the layers may be derived from interlayer water or fro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b59e90711a47c5863c014158760da8f5
https://doi.org/10.1016/s0169-1317(01)00038-2
https://doi.org/10.1016/s0169-1317(01)00038-2
Autor:
L. Heller-Kallai
Publikováno v:
Journal of thermal analysis. 50:145-156
When clays are heated, a mass loss occurs due to the evolution of volatiles. Most of these are water vapour, but in addition minor amounts of a complex assemblage of other species are liberated. The corresponding condensates are colloidal suspensions
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::398e5754be517bf8e2f8de7b81c0b08a
https://doi.org/10.1007/bf01979557
https://doi.org/10.1007/bf01979557
Autor:
L. Heller-Kallai
Publikováno v:
Clays and Clay Minerals. 45:476-479
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a18755d6fb7d462ba4830fbe2d5390da
https://doi.org/10.1346/ccmn.1997.0450316
https://doi.org/10.1346/ccmn.1997.0450316
Autor:
L. Heller-Kallai
Changes in temperature alter the structure and properties of clay minerals. Four temperature ranges are distinguished: (1) Temperatures sufficiently low to cause partial freezing of clay mineral dispersions or pastes: in this temperature range some o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::39340272a0a9dee938f40216ac65ada0
https://doi.org/10.1016/b978-0-08-098258-8.00014-6
https://doi.org/10.1016/b978-0-08-098258-8.00014-6
Publikováno v:
Clays and Clay Minerals. 44:393-397
Conversion of tertiary butylacetate to isobutylene and acetic acid and cracking of n-octane were used as model reactions to monitor the catalytic activity of a condensate and aqueous extract derived from a sample of montmorillonite. The condensate wa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::28903c941dc16ba0d3aa58ce0146219f
https://doi.org/10.1346/ccmn.1996.0440308
https://doi.org/10.1346/ccmn.1996.0440308