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Possibility of thermal analysis of different types of bonding of water in minerals

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Abstract

Various types of water bonding were studied. e.g. water bound by occlusion, by adsorption, by capillary condensation, by chemisorption and as a solid solution, zeolitic water, interlayer water, crystal water and structural water bound in form of hydroxil groups. The differentiation of these various types of bonding is rather difficult, for on heating water is evolved at various temperatures and in rather wide temperature domains which overlap to different extents. Efforts were made to improve the detection by applying the quasi-isothermal quasi-isobaric measuring technique.

Zusammenfassung

Es wurden verschiedene Bindungstypen von Wasser untersucht. Wasser kann unter anderem durch Einschlüsse, Adsorption. Kapillarkondensation, Chemisorption und in Form von Mischkristallen, zeolitisch, schichteingebettetem und Kristallwasser sowie als OH-Form gebunden sein. Die Untersuchung dieser zahlreichen Bindungstypen ist äußerst schwierig, da die Wasserabgabe bei verschiedenen Temperaturen geschieht und die ziemlich breiten Temperaturintervalle mehr oder weniger überlappen. Mittels quasiisothermen und quasiisobaren Meßtechniken wurde versucht, die Möglichkeit der Bestimmung zu verbessern.

Резуме

Изучены различные ти пы связанной воды. Сре ди различных типов моле кул воды, связанной окклюзией, адсорбцией, капилляр ной конденсацией, хемисо рбцией, найдена струк турная вода в виде твердого р аствора, цеолитной ме жслоевой, кристаллической и в в иде ОНформы. Дифференциация всех типов связанной воды довольно трудная задача, поско льку выделение воды происходит в шир окой области темпера тур, интервал которых в бо льшей или меньшей мере перекры вается. Путем использ ования квазиизотермически х квазиизобарически х методов измерения, бы ли предприняты попыт ки улучшить обнаружение различн ых типов связанной воды.

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Földvári, M., Paulik, F. & Paulik, J. Possibility of thermal analysis of different types of bonding of water in minerals. Journal of Thermal Analysis 33, 121–132 (1988). https://doi.org/10.1007/BF01914591

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