{"id":3006,"date":"2017-04-27T13:33:55","date_gmt":"2017-04-27T11:33:55","guid":{"rendered":"http:\/\/agora.xtec.cat\/iesm-jmzafra\/?p=3006"},"modified":"2017-04-27T13:33:55","modified_gmt":"2017-04-27T11:33:55","slug":"fluorita","status":"publish","type":"post","link":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/blogs\/museu-de-geologia\/fluorita\/","title":{"rendered":"Fluorita"},"content":{"rendered":"

\"fluoritabonaeditat\"<\/a><\/p>\n

    \n
  1. NOM:<\/b> El nom en catal\u00e0 i castell\u00e0 \u00e9s \u201cfluorita\u201d en angl\u00e8s es <\/span> \u201cflourite\u201d.<\/span><\/li>\n<\/ol>\n

    \u00a0\u00a0\u00a0\u00a0\u00a02 .<\/span>DESCRIPCI\u00d3: <\/b> La <\/span> fluorita \u00e9s un mineral compost per fluorur de calci de la classe <\/span> dels halurs. Va ser descoberta l\u2019any 1529. La fluorita apareix en <\/span> diversos tipus de jaciments, per\u00f2 pprincipalment en aquells que <\/span> estan en contacte amb roques carbonatades, on s\u2019origina per la <\/span> consolidaci\u00f3 dels fluids magm\u00e0tics despr\u00e9s de la solidificaci\u00f3 <\/span> de roques com granits. La f\u00f3rmula qu\u00edmica de la fluorita es CaF<\/span>2 <\/span> .<\/span><\/p>\n

     <\/p>\n

    CARACTER\u00cdSTIQUES:<\/span><\/p>\n

    Es presenta formant bolsadas en forma de geodes o druses i ocupant fissures i buits. En estat pur \u00e9s incolora i transparent, encara que en la majoria dels casos presenta diverses coloracions que es poden deure a impureses org\u00e0niques o minerals; els m\u00e9s habituals van del lila al violeta per\u00f2 la fluorita tamb\u00e9 pot ser blau, verd, rosa, ataronjada, groc o de tons menys definits. Moltes varietats mostren fluoresc\u00e8ncia.<\/span>
    \n<\/span>
    \n<\/span>Se sol presentar amb forma de cristalls d’h\u00e0bit c\u00fabic molt ben formats, freq\u00fcentment amb macles de compenetraci\u00f3 de cubs. Les altres formes s\u00f3n rares, encara que poden obtenir-se octaedres per exfoliaci\u00f3. Tamb\u00e9 massiu, compacte o granular.<\/span>
    \n<\/span><\/p>\n

     <\/p>\n

     <\/p>\n

      \n
    1. Quin <\/span> tipus de roca, mineral o f\u00f2ssil \u00e9s? <\/span>Aquest mineral sol trobar-se en vetes pures o associat amb menes de plom, plata o zinc. \u00c9s com\u00fa en calc\u00e0ries i en dolomites i, en algunes ocasions, \u00e9s un mineral accessori en pegmatites i en altres roques \u00edgnies<\/span><\/li>\n<\/ol>\n
        \n
      1. \u00a0\u00a0b) \u00a0\u00a0Com s\u2019ha format? <\/span>La fluorita \u00e9s un mineral format p<\/span>er una combinaci\u00f3 de calci i fluor<\/span><\/li>\n
      2. c) Quina \u00e9s la composici\u00f3 qu\u00edmica dels minerals? La seva<\/span> f\u00f3rmula \u00e9s CaF<\/span>2<\/span>… Es descriu com un empaquetament c\u00fabic compacte d’\u00e0toms de Ca, en el qual els \u00e0toms de F ocupen tots els buits tetra\u00e8drics. Si es t\u00e9 en compte la relaci\u00f3 de radis i\u00f2nics, aquesta descripci\u00f3 sembla absurda (1.33 \u00c5 per F i 0.99 per Ca2 +) – els ions F- mai cabrien en els buits de Ca. No obstant aix\u00f2, aquesta descripci\u00f3 reprodueix fidelment les posicions relatives de els \u00e0toms en la cel\u00b7la unitat.<\/span><\/li>\n<\/ol>\n

        c)Quina antiguitat t\u00e9 ? T\u00e9 488 anys d\u2019antiguitat des de que la van trobar.<\/span><\/p>\n

        3. \u00c8POCA <\/b> GEOL\u00d2GICA<\/b><\/p>\n

        De cada f\u00f2ssil cal descriure <\/span>l\u2019\u00e8poca geol\u00f2gica<\/b> on va viure, incloent-hi imatges (m\u00ednim 250 carac.)<\/span><\/p>\n

        4. \u00daS<\/b>: <\/span> la metal\u00b7l\u00fargia, la cer\u00e0mica i la industria qu\u00edmica, tamb\u00e9 \u00e9s <\/span> utilitzada en la industria \u00f2ptica i pels lapidaris. El fluorespar, <\/span> el nom amb qu\u00e8 s\u2019anomena la fluorita quan es ven processada o en <\/span> grans quanitats, es divideix en tres graus, els tres s\u00f3n diferents: <\/span> \u00e0cid, cer\u00e0mic i metal\u00b7l\u00fargic.<\/span><\/p>\n

        5. LLOC D\u2019ORIGEN:<\/b> El lloc d\u2019origen \u00e9s J\u00e1chymov, aqu\u00ed \u00e9s on es va trobar la fluorita. \u00c9s una petita <\/span> ciutat, pertany a Rep\u00fablica Txeca situada al nord-oest de Boh\u00e8mia <\/span> a una al\u00e7ada de 733 m per sobre del nivell del mar.<\/span><\/p>\n

         <\/p>\n","protected":false},"excerpt":{"rendered":"

        NOM: El nom en catal\u00e0 i castell\u00e0 \u00e9s \u201cfluorita\u201d en angl\u00e8s es \u201cflourite\u201d. \u00a0\u00a0\u00a0\u00a0\u00a02 .DESCRIPCI\u00d3: La fluorita \u00e9s un mineral compost per fluorur de calci de la classe dels halurs. Va ser descoberta l\u2019any 1529. La fluorita apareix en diversos tipus de jaciments, per\u00f2 pprincipalment en aquells que estan en contacte amb roques carbonatades, on […]<\/p>\n","protected":false},"author":105,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"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 center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[321],"tags":[],"class_list":["post-3006","post","type-post","status-publish","format-standard","hentry","category-museu-de-geologia"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/posts\/3006","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/users\/105"}],"replies":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/comments?post=3006"}],"version-history":[{"count":1,"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/posts\/3006\/revisions"}],"predecessor-version":[{"id":3021,"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/posts\/3006\/revisions\/3021"}],"wp:attachment":[{"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/media?parent=3006"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/categories?post=3006"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/tags?post=3006"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}