{"id":98262,"date":"2018-03-11T10:19:02","date_gmt":"2018-03-11T10:19:02","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/thermodynamics-and-crystallographic-relationships-of-the-gypsum-brushite-caso4-2h20-cahp04-2h20-system\/"},"modified":"2018-03-11T10:19:02","modified_gmt":"2018-03-11T10:19:02","slug":"thermodynamics-and-crystallographic-relationships-of-the-gypsum-brushite-caso4-2h20-cahp04-2h20-system","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/mineralogia\/thermodynamics-and-crystallographic-relationships-of-the-gypsum-brushite-caso4-2h20-cahp04-2h20-system\/","title":{"rendered":"Thermodynamics and crystallographic relationships of the  gypsum-brushite (caso4.2h20-cahp04.2h20) system"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Andre Filipe Jorge Pinto <\/strong><\/h2>\n<p>Resumen en castellano  en esta tesis doctoral se investigan los procesos de interacci\u00f3n de yeso con p(v) en disoluci\u00f3n acuosa a macro, micro y nanoescala con el objetivo de determinar las relaciones cristalogr\u00e1ficas y la termodin\u00e1mica del sistema caso4\u00c2\u00bf2h2o &#8211; cahpo4\u00c2\u00bf2h2o-h2o.  Asimismo, se estudia la conducta de deshidrataci\u00f3n de los miembros de la soluci\u00f3n s\u00f3lida ca (hp,s)o4\u00c2\u00bf2h2o empleando m\u00e9todos termo-gravim\u00e9tricos y de difracci\u00f3n de rayos x con c\u00e1mara de alta temperatura. Los resultados obtenidos permiten la descripci\u00f3n detallada del crecimiento epitaxial de brushita sobre la superficie de exfoliaci\u00f3n del yeso, incluyendo comparaciones estructurales a la escala molecular, la determinaci\u00f3n de mecanismos de crecimiento y las condiciones de equilibrio termodin\u00e1mico halladas durante el proceso de interacci\u00f3n. Los resultados experimentales tambi\u00e9n demuestran la baja miscibilidad en el sistema ca(so4,hpo4).2h2o, debido a la tendencia de ordenaci\u00f3n de los grupos sulfato y fostato siguiendo el modelo cristalogr\u00e1fico de la sal doble ardealita (ca2so4hpo4.4h2o).   resumen (en otro idioma)  this thesis is focused on the macro, micro and nanoscale study of the interaction between phosphate-bearing aqueous solutions and gypsum. Moreover, the assessment of the miscibility and dehydratation behaviour of the ca(so4,hpo4).2h2o solid solution, through an x-ray diffraction study, and thermogravimetry experiments. The obtained results enable a detailed description of the epitaxial overgrowth of brushite on the gypsum cleavage surface, including molecular scale comparisons, determination of growth mechanisms and reaction paths followed by the system. The experimental results also reveal very limited miscibility within the ca(so4,hpo4).2h2o solid solution system, since the phosphate and sulphate groups tend to occupy specific lattice sites, as reflected by the structure of ardealite (ca2so4hpo4.4h2o), which was synthesized during experimental stages.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Thermodynamics and crystallographic relationships of the  gypsum-brushite (caso4.2h20-cahp04.2h20) system<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Thermodynamics and crystallographic relationships of the  gypsum-brushite (caso4.2h20-cahp04.2h20) system <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Andre Filipe Jorge Pinto <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Oviedo<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 18\/12\/2009<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Manuel Prieto Rubio<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: lourdes Fern\u00e1ndez d\u00edaz <\/li>\n<li>guntram Jordan (vocal)<\/li>\n<li>alejandro Rodr\u00edguez navarro (vocal)<\/li>\n<li>agust\u00edn Mart\u00edn izard (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Andre Filipe Jorge Pinto Resumen en castellano en esta tesis doctoral se investigan los procesos de interacci\u00f3n [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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