{"id":5381,"date":"2019-09-29T21:31:28","date_gmt":"2019-09-29T19:31:28","guid":{"rendered":"http:\/\/lartzoomeur.com\/bijoux\/?p=5381"},"modified":"2020-04-27T19:11:14","modified_gmt":"2020-04-27T23:11:14","slug":"fluorite","status":"publish","type":"post","link":"https:\/\/canadianartworks.com\/fr\/fluorite\/","title":{"rendered":"Fluorite"},"content":{"rendered":"<div class=\"vc_row wpb_row vc_row-fluid et_custom_uniqid_6a2931547a7b8 mpc-row\"><div class=\"wpb_column vc_column_container vc_col-sm-6 et_custom_uniqid_6a2931547a789 mpc-column\" data-column-id=\"mpc_column-226a2931571bc24\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\">\n\t<div class=\"wpb_text_column wpb_content_element\">\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p style=\"text-align: justify;\"><strong>Fluorite<\/strong><\/p>\n<p style=\"text-align: justify;\">La fluorite (\u00e9galement appel\u00e9e fluorspar) est la forme min\u00e9rale du fluorure de calcium. Il appartient aux min\u00e9raux halog\u00e9n\u00e9s. Il se cristallise en forme cubique isom\u00e9trique, bien que les formes isom\u00e9triques octa\u00e9driques et plus complexes ne soient pas rares.<\/p>\n<p>Sa formule est: CaF<sub>2<\/sub><\/p>\n<p style=\"text-align: justify;\">La fluorite est un min\u00e9ral color\u00e9, \u00e0 la fois dans la lumi\u00e8re visible et ultraviolette, et la pierre a des utilisations ornementales et lapidaires. Industriellement, la fluorite sert de fondant \u00e0 la fusion et \u00e0 la production de certains verres et \u00e9maux. Les qualit\u00e9s de fluorine les plus pures sont une source de fluorure pour la fabrication d'acide fluorhydrique, qui est la source interm\u00e9diaire de la plupart des produits chimiques fins contenant du fluor. Les lentilles en fluorite transparentes optiquement claires ont une faible dispersion. Par cons\u00e9quent, les lentilles fabriqu\u00e9es \u00e0 partir de celle-ci pr\u00e9sentent moins d'aberration chromatique, ce qui les rend tr\u00e8s utiles pour les microscopes et les t\u00e9lescopes. Les optiques \u00e0 fluorite sont \u00e9galement utilisables dans les gammes ultraviolette lointaine et infrarouge moyen, o\u00f9 les verres classiques sont trop absorbants pour \u00eatre utilis\u00e9s.<\/p>\n<p style=\"text-align: justify;\">Le mot <i>fluorite<\/i> est d\u00e9riv\u00e9 du verbe latin <i>fluere<\/i>, qui signifie <i>couler. <\/i>En 1852, la fluorite a donn\u00e9 son nom au ph\u00e9nom\u00e8ne de fluorescence, qui est pr\u00e9dominant dans les fluorites provenant de certains endroits, en raison de certaines impuret\u00e9s dans le cristal. La fluorite a \u00e9galement donn\u00e9 le nom \u00e0 son \u00e9l\u00e9ment constitutif, la fluorine.<sup id=\"cite_ref-Mindat_2-1\" class=\"reference\"><\/sup> Actuellement, le terme \u00abfluorpar\u00bb est le plus couramment utilis\u00e9 pour d\u00e9signer la fluorite en tant que produit industriel et chimique, tandis que \u00abfluorite\u00bb est utilis\u00e9 de mani\u00e8re min\u00e9ralogique et dans la plupart des autres sens.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><div class=\"wpb_column vc_column_container vc_col-sm-6 et_custom_uniqid_6a2931547a789 mpc-column\" data-column-id=\"mpc_column-176a2931571c4e7\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\">\n\t<div class=\"wpb_single_image wpb_content_element vc_align_center\">\n\t\t\n\t\t<figure class=\"wpb_wrapper vc_figure\">\n\t\t\t<div class=\"vc_single_image-wrapper   vc_box_border_grey\"><img decoding=\"async\" width=\"1024\" height=\"950\" src=\"https:\/\/canadianartworks.com\/wp-content\/uploads\/2019\/09\/fluorite-1024x950.jpg\" class=\"vc_single_image-img attachment-large\" alt=\"\" srcset=\"https:\/\/canadianartworks.com\/wp-content\/uploads\/2019\/09\/fluorite-1024x950.jpg 1024w, https:\/\/canadianartworks.com\/wp-content\/uploads\/2019\/09\/fluorite-300x278.jpg 300w, https:\/\/canadianartworks.com\/wp-content\/uploads\/2019\/09\/fluorite-768x713.jpg 768w, https:\/\/canadianartworks.com\/wp-content\/uploads\/2019\/09\/fluorite-400x371.jpg 400w, https:\/\/canadianartworks.com\/wp-content\/uploads\/2019\/09\/fluorite.jpg 1600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/div>\n\t\t<\/figure>\n\t<\/div>\n<\/div><\/div><\/div><\/div><div class=\"vc_row wpb_row vc_row-fluid vc_custom_1569787473826 vc_row-has-fill et_custom_uniqid_6a2931547a7b8 mpc-row\"><div class=\"wpb_column vc_column_container vc_col-sm-12 vc_col-has-fill et_custom_uniqid_6a2931547a789 mpc-column\" data-column-id=\"mpc_column-206a2931571cada\"><div class=\"vc_column-inner vc_custom_1569787486712\"><div class=\"wpb_wrapper\">\n\t<div class=\"wpb_text_column wpb_content_element\">\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<h4 style=\"text-align: justify;\">Fluorite peut \u00eatre fluorescente<\/h4>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">La fluorite est l\u2019un des min\u00e9raux susceptibles de produire une fluorescence. En utilisant la lumi\u00e8re UV, vous pouvez obtenir des couleurs de fluorescence tr\u00e8s int\u00e9ressantes: blanc, violet, rouge, jaune, vert et bleu, qui sont les couleurs les plus couramment expos\u00e9es. C\u2019est l\u2019une des raisons pour lesquelles beaucoup aiment obtenir un bel \u00e9chantillon de fluorite\u2026 Saviez-vous qu\u2019un homme du nom de George Gabriel Stokes avait d\u00e9couvert le ph\u00e9nom\u00e8ne de la fluorescence en 1852 gr\u00e2ce \u00e0 un article sur le changement de longueur d\u2019onde de la lumi\u00e8re? Dans son article, il a not\u00e9 que le fluorspar et le verre d'uranium, sous un rayonnement ultraviolet, \u00e9mettraient une lumi\u00e8re pouvant devenir visible. 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