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Growth and dissolution of crystals under linear pressure

Growth and dissolution of crystals under linear pressure GROWTH AND DISSOLUTION OF CRYSTALS UNDER LINEAR PRESSURE BY CARL W. CORRENS Received 4th March, 1949 Two problems are closely connected with crystal growth concerning which much obscurity exists still. It is strange that the connection between the two problems has only recently been established although both are the expression of the same laws. The two problems are, on the one hand, the pressure exercised by growing crystals and, on the other, the dissolution of crystals under the influence of linear pressure. In this connection by growth pressure (Wachstumsdruck) is meant only the property of a growing crystal to lift an imposed weight ; volume changes occurring during phase changes (ice+water), with crystallization in saturated solutions, or with hydration are excluded here. Large effects have been attributed to this growth pressure especially in connection with the formation of ore-veins. The dissolution under linear pressure (the so-called Riecke’s principle) has been made use of by Becke to explain the tabular and platy habit of minerals in crystalline schists. The Riecke principle,2 a principle already formulated by Thom~on,~ states that under linear pressure a crystal has a lower melting point or a greater solubility respectively than an unpressed crystal. In aqueous http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Discussions of the Faraday Society Royal Society of Chemistry

Growth and dissolution of crystals under linear pressure

Royal Society of Chemistry — Jan 1, 1949

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Abstract

GROWTH AND DISSOLUTION OF CRYSTALS UNDER LINEAR PRESSURE BY CARL W. CORRENS Received 4th March, 1949 Two problems are closely connected with crystal growth concerning which much obscurity exists still. It is strange that the connection between the two problems has only recently been established although both are the expression of the same laws. The two problems are, on the one hand, the pressure exercised by growing crystals and, on the other, the dissolution of crystals under the influence of linear pressure. In this connection by growth pressure (Wachstumsdruck) is meant only the property of a growing crystal to lift an imposed weight ; volume changes occurring during phase changes (ice+water), with crystallization in saturated solutions, or with hydration are excluded here. Large effects have been attributed to this growth pressure especially in connection with the formation of ore-veins. The dissolution under linear pressure (the so-called Riecke’s principle) has been made use of by Becke to explain the tabular and platy habit of minerals in crystalline schists. The Riecke principle,2 a principle already formulated by Thom~on,~ states that under linear pressure a crystal has a lower melting point or a greater solubility respectively than an unpressed crystal. In aqueous

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Discussions of the Faraday SocietyRoyal Society of Chemistry

Published: Jan 1, 1949

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