{"id":2099,"date":"2025-09-02T16:03:04","date_gmt":"2025-09-02T19:03:04","guid":{"rendered":"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/?p=2099"},"modified":"2025-09-02T16:03:05","modified_gmt":"2025-09-02T19:03:05","slug":"tantalita-tantalite","status":"publish","type":"post","link":"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/tantalita-tantalite\/","title":{"rendered":"Tantalita (Tantalite)"},"content":{"rendered":"\n<p class=\"has-black-color has-text-color has-medium-font-size\">A tantalita (Fe,Mn)Ta\u2082O\u2086 \u00e9 um \u00f3xido de ferro, mangan\u00eas e t\u00e2ntalo do grupo columbita\u2013tantalita, cristalizando no sistema ortorr\u00f4mbico, formando cristais tabulares ou prism\u00e1ticos, al\u00e9m de massas granulares ou compactas. Apresenta cor preta a preto-acastanhada, brilho submet\u00e1lico a resinoso, dureza 6\u20136,5, densidade relativa 7,3\u20138,0 (varia\u00e7\u00e3o conforme teor de ferro e mangan\u00eas), fratura subconchoidal a irregular e clivagem imperfeita. \u00c9 t\u00edpica de pegmatitos gran\u00edticos ricos em elementos raros, associada a columbita, espodum\u00eanio, turmalina e cassiterita, e tamb\u00e9m ocorre em dep\u00f3sitos aluvionares secund\u00e1rios. \u00c9 a principal fonte de t\u00e2ntalo, usado em capacitores eletr\u00f4nicos, ligas resistentes ao calor, componentes aeroespaciais e equipamentos de alta tecnologia. N\u00e3o \u00e9 utilizada como gema, mas tem grande import\u00e2ncia estrat\u00e9gica para ind\u00fastrias tecnol\u00f3gicas e energ\u00e9ticas. Ocorre no Brasil (Minas Gerais, Rond\u00f4nia), Rep\u00fablica Democr\u00e1tica do Congo (coltan), Nig\u00e9ria, Mo\u00e7ambique, Canad\u00e1 (Quebec) e Estados Unidos (Dakota do Sul, Virg\u00ednia).<\/p>\n\n\n\n<div class=\"minerais-content\">\n<style>\n  \/* Quadradinhos na cor #9c5932 *\/\n  .minerais-content ul.custom-square {\n    list-style-type: none;\n    padding-left: 4em;\n  }\n  .minerais-content ul.custom-square li {\n    position: relative;\n    color: black;\n    margin-bottom: 0.3em;\n  }\n  .minerais-content ul.custom-square li::before {\n    content: \"\u25a0\";\n    color: #9c5932;\n    position: absolute;\n    left: -2.5em;\n    font-size: 1em;\n    top: 0;\n  }\n  \/* Setinha \u25ba antes dos t\u00edtulos *\/\n  .minerais-content .with-arrow::before {\n    content: \"\u25ba\";\n    color: #9c5932;\n    margin-right: 0.4em;\n  }\n  \/* Texto preto e tamanhos *\/\n  .minerais-content p,\n  .minerais-content span,\n  .minerais-content strong,\n  .minerais-content ul,\n  .minerais-content li,\n  .minerais-content td {\n    color: black !important;\n    font-size: 0.95em;\n  }\n  \/* Tabela com espa\u00e7amento interno m\u00ednimo e bordas #9c5932 *\/\n  .minerais-content table.property-table {\n    width: 100%;\n    border-collapse: collapse;\n    margin-bottom: 2em;\n    border: 1.5px solid #9c5932;\n  }\n  .minerais-content table.property-table td {\n    vertical-align: middle;\n    padding: 0.05em 0.1em;\n    text-align: justify;\n    border: 1px solid #9c5932;\n  }\n  .minerais-content table.property-table td:first-child {\n    font-weight: bold;\n    white-space: nowrap;\n    color: black;\n    position: relative;\n    text-align: left;\n  }\n  .minerais-content table.property-table \ntd:first-child::before {\n    content: \"\u25ba\";\n    color: #9c5932;\n    margin-right: 0.4em;\n  }\n  .minerais-content hr.custom-divider {\n    border: none;\n    border-top: 3px solid #9c5932;\n    margin: 2em 0;\n  }\n<\/style>\n\n\n\n<hr class=\"custom-divider\">\n\n<table class=\"property-table\">\n  <tr>\n    <td>Classe<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>\u00d3xidos<\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n  <tr>\n    <td>Grupo<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>Columbita\u2013Tantalita<\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n  <tr>\n    <td>Composi\u00e7\u00e3o Qu\u00edmica<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>(Fe,Mn)Ta\u2082O\u2086 \u2013 \u00f3xido de ferro, mangan\u00eas e t\u00e2ntalo<\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n  <tr>\n    <td>Sistema Cristalino<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>Ortorr\u00f4mbico<\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n  <tr>\n    <td>H\u00e1bito<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>Cristais tabulares ou prism\u00e1ticos<\/li>\n        <li>Tamb\u00e9m em massas granulares ou compactas<\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n  <tr>\n    <td>Cor<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>Preto a preto-acastanhado<\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n  <tr>\n    <td>Brilho<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>Submet\u00e1lico a resinoso<\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n  <tr>\n    <td>Dureza (Mohs)<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>6 \u2013 6,5<\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n  <tr>\n    <td>Densidade Relativa<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>7,3 \u2013 8,0 (varia\u00e7\u00e3o devido ao teor de ferro e mangan\u00eas)<\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n  <tr>\n    <td>Clivagem<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>Imperfeita<\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n  <tr>\n    <td>Fratura<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>Subconchoidal a irregular<\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n<\/table>\n\n<hr class=\"custom-divider\">\n\n<p style=\"margin-bottom: 1.3em;\">\n  <strong class=\"with-arrow\" style=\"font-size: 1.1em; display: inline;\">Origem<\/strong>\n  <span>\n    Mineral t\u00edpico de pegmatitos gran\u00edticos ricos em elementos raros, associado a columbita, espodum\u00eanio, turmalina e cassiterita. Tamb\u00e9m ocorre em dep\u00f3sitos secund\u00e1rios aluvionares devido \u00e0 alta densidade e resist\u00eancia.\n  <\/span>\n<\/p>\n\n<p class=\"with-arrow\" style=\"margin-bottom: 0.8em; font-size: 1.1em; font-weight: bold; display: block;\">Usos<\/p>\n<ul class=\"custom-square\" style=\"line-height: 1.8;\">\n  <li><strong>Industrial<\/strong> \u2013 Fonte prim\u00e1ria de t\u00e2ntalo, usado em capacitores eletr\u00f4nicos, ligas resistentes ao calor, componentes aeroespaciais e equipamentos de alta tecnologia.<\/li>\n  <li><strong>Cient\u00edfico<\/strong> \u2013 Importante em estudos de petrog\u00eanese de pegmatitos e prospec\u00e7\u00e3o de minerais estrat\u00e9gicos.<\/li>\n  <li><strong>Gemol\u00f3gico<\/strong> \u2013 N\u00e3o utilizada como gema devido \u00e0 cor escura e opacidade.<\/li>\n  <li><strong>Outros<\/strong> \u2013 Mineral estrat\u00e9gico cr\u00edtico para a ind\u00fastria tecnol\u00f3gica e energ\u00e9tica.<\/li>\n<\/ul>\n\n<p class=\"with-arrow\" style=\"margin-bottom: 0.8em; font-size: 1.1em; font-weight: bold; display: block;\">Localiza\u00e7\u00f5es T\u00edpicas<\/p>\n<ul class=\"custom-square\" style=\"line-height: 1.8;\">\n  <li><strong>Brasil<\/strong> \u2013 Minas Gerais (Arax\u00e1, Itinga, Ara\u00e7ua\u00ed), Rond\u00f4nia<\/li>\n  <li><strong>Rep\u00fablica Democr\u00e1tica do Congo<\/strong> \u2013 Dep\u00f3sitos de coltan<\/li>\n  <li><strong>Nig\u00e9ria<\/strong> \u2013 Pegmatitos ricos em t\u00e2ntalo<\/li>\n  <li><strong>Mo\u00e7ambique<\/strong> \u2013 Pegmatitos gran\u00edticos<\/li>\n  <li><strong>Canad\u00e1<\/strong> \u2013 Quebec<\/li>\n  <li><strong>Estados Unidos<\/strong> \u2013 Dakota do Sul, Virg\u00ednia<\/li>\n<\/ul>\n\n<hr class=\"custom-divider\">\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Tantalia.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" data-id=\"2100\" src=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Tantalia-1024x1024.png\" alt=\"\" class=\"wp-image-2100\" srcset=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Tantalia-1024x1024.png 1024w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Tantalia-300x300.png 300w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Tantalia-150x150.png 150w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Tantalia-768x768.png 768w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Tantalia-200x200.png 200w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Tantalia-70x70.png 70w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/09\/Tantalia.png 1440w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n<\/figure>\n","protected":false},"excerpt":{"rendered":"<p>A tantalita (Fe,Mn)Ta\u2082O\u2086 \u00e9 um \u00f3xido de ferro, mangan\u00eas e t\u00e2ntalo do grupo columbita\u2013tantalita, cristalizando no sistema ortorr\u00f4mbico, formando cristais tabulares ou [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":2100,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[45,35],"tags":[],"class_list":["post-2099","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-hidroxidos","category-oxidos"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - 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