Interaction of kaolinite with calcite on heating. IV. Rehydrated and recarbonated samples

L. Heller-Kallai; R. C. Mackenzie

doi:10.1016/0040-6031(89)85245-1

Interaction of kaolinite with calcite on heating. IV. Rehydrated and recarbonated samples

L. Heller-Kallai^*
, R. C. Mackenzie

^*Corresponding author for this work

Fredy & Nadine Herrmann Institute of Earth Sciences

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

Calcite thermally dissociated in the presence of various kaolinites was partially preserved as a discrete phase. Proximity of the clay caused corrosion of the calcite rhombs, even before decarbonation occurred and CaO formed. The kaolinite sample used determined the CaCO₃ polymorph formed on recarbonation and polymorphs with very different morphologies were obtained. Volatiles evolved on heating kaolinite also affected the recarbonation reaction, but to a lesser extent than contact with the clay.

Original language	English
Pages (from-to)	439-444
Number of pages	6
Journal	Thermochimica Acta
Volume	148
Issue number	C
DOIs	https://doi.org/10.1016/0040-6031(89)85245-1
State	Published - 4 Aug 1989

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abstract = "Calcite thermally dissociated in the presence of various kaolinites was partially preserved as a discrete phase. Proximity of the clay caused corrosion of the calcite rhombs, even before decarbonation occurred and CaO formed. The kaolinite sample used determined the CaCO3 polymorph formed on recarbonation and polymorphs with very different morphologies were obtained. Volatiles evolved on heating kaolinite also affected the recarbonation reaction, but to a lesser extent than contact with the clay.",

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N2 - Calcite thermally dissociated in the presence of various kaolinites was partially preserved as a discrete phase. Proximity of the clay caused corrosion of the calcite rhombs, even before decarbonation occurred and CaO formed. The kaolinite sample used determined the CaCO3 polymorph formed on recarbonation and polymorphs with very different morphologies were obtained. Volatiles evolved on heating kaolinite also affected the recarbonation reaction, but to a lesser extent than contact with the clay.

AB - Calcite thermally dissociated in the presence of various kaolinites was partially preserved as a discrete phase. Proximity of the clay caused corrosion of the calcite rhombs, even before decarbonation occurred and CaO formed. The kaolinite sample used determined the CaCO3 polymorph formed on recarbonation and polymorphs with very different morphologies were obtained. Volatiles evolved on heating kaolinite also affected the recarbonation reaction, but to a lesser extent than contact with the clay.

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ER -

Interaction of kaolinite with calcite on heating. IV. Rehydrated and recarbonated samples

Abstract

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