Interfaces structure and stress of gypsum (CaSO4·2H2O) penetration twins

Marco Rubbo; Marco Bruno; Francesco Roberto Massaro; Dino Aquilano

doi:10.1039/C2CE25729G

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Interfaces structure and stress of gypsum (CaSO₄·2H₂O) penetration twins†

Marco Rubbo,*^a Marco Bruno,^a Francesco Roberto Massaro^a and Dino Aquilano^a

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* Corresponding authors

^a Dipartimento di Scienze della Terra, Università degli Studi di Torino, Via Valperga Caluso 35, I-10125 Torino, Italy
E-mail: marco.rubbo@unito.it
Fax: +39 0116705128
Tel: +39 0116705127

Abstract

In this work a structural analysis of the interface of the [2 with combining macron] 01 penetration twins of gypsum is presented. The choice of 010 as the original composition plane of the twins is justified on energy and kinetic grounds. Besides, by static energy minimization, we calculate the relative bulk translations of the two crystals making the twin and the atomic movements at the interface of the bi-crystal. These structural details are described and the interface excess stress is evaluated.

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Article information

DOI: https://doi.org/10.1039/C2CE25729G
Article type: Paper
Submitted: 10 May 2012
Accepted: 15 Nov 2012
First published: 15 Nov 2012

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CrystEngComm, 2013,15, 958-964

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Interfaces structure and stress of gypsum (CaSO₄·2H₂O) penetration twins

M. Rubbo, M. Bruno, F. R. Massaro and D. Aquilano, CrystEngComm, 2013, 15, 958 DOI: 10.1039/C2CE25729G

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