Pressure effect on the dissolution of α-quartz in different aqueous solutions

Fabrice Lafon Laboratoire de Chimie du Solide du CNRS and Interface Hautes Pressions LCS-CNRSIENSCPB, Université BORDEAU X I, 351 Cours de la Libération, 33405, Talence Cedex, (France)

Jean Curtet Laboratoire de Chimie du Solide du CNRS and Interface Hautes Pressions LCS-CNRSIENSCPB, Université BORDEAU X I, 351 Cours de la Libération, 33405, Talence Cedex, (France)

Gerard Demazeau Laboratoire de Chimie du Solide du CNRS and Interface Hautes Pressions LCS-CNRSIENSCPB, Université BORDEAU X I, 351 Cours de la Libération, 33405, Talence Cedex, (France)

Abstract

Hydrothermal experiments were carried out in order to evaluate the pressure effect on the solubility limit of α-quartz in different aqueous solutions (NaOH-1M and Na₂CO₃-1M). The behaviour of such solutions at high pressure is different.

Na₂CO₃(1M) aqueous solution seems to be appropriate for dissolving highly α-quartz (400°C) in two domains of pressure 100 ≤ P ≤ 190 MPa and 300 ≤ P ≤ 350 MPa. Thus it can be used as solvent, instead of NaOH(1M), for hydrothermal quartz growth applications.

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Pressure effect on the dissolution of α-quartz in different aqueous solutions

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Pressure effect on the dissolution of α-quartz in different aqueous solutions

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