{"id":1268,"date":"2025-06-02T11:08:19","date_gmt":"2025-06-02T14:08:19","guid":{"rendered":"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/?p=1268"},"modified":"2025-06-09T14:08:27","modified_gmt":"2025-06-09T17:08:27","slug":"anfibolio","status":"publish","type":"post","link":"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/anfibolio\/","title":{"rendered":"Anfib\u00f3lio (Amphibole)"},"content":{"rendered":"\n<p class=\"has-black-color has-text-color\">Os anfib\u00f3lios s\u00e3o minerais silicatos complexos com h\u00e1bito prism\u00e1tico ou fibroso, comuns em rochas metam\u00f3rficas e \u00edgneas. Possuem clivagem t\u00edpica em 56\u00b0 e 124\u00b0, e incluem minerais como tremolita, actinolita e hornblenda. Variedades fibrosas foram usadas como asbesto, mas hoje t\u00eam uso restrito. S\u00e3o importantes indicadores de condi\u00e7\u00f5es metam\u00f3rficas.<\/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\n<hr class=\"custom-divider\">\n\n<table class=\"property-table\">\n  <tr>\n    <td>Composi\u00e7\u00e3o Qu\u00edmica:<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>F\u00f3rmula geral: A\u2080\u2013\u2081B\u2082C\u2085T\u2088O\u2082\u2082(OH,F)\u2082<br>\n          <span style=\"font-size: 0.9em;\">(Silicato complexo com combina\u00e7\u00f5es variadas de c\u00e1lcio, s\u00f3dio, magn\u00e9sio, ferro, alum\u00ednio e sil\u00edcio. O grupo dos anfib\u00f3lios inclui minerais como tremolita, actinolita, hornblenda, glauc\u00f3fano, entre outros.)<\/span>\n        <\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n  <tr>\n    <td>Sistema Cristalino:<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>Monocl\u00ednico (predominante) ou Ortorr\u00f4mbico (alguns membros)<\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n  <tr>\n    <td>H\u00e1bito:<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>Prism\u00e1tico alongado<\/li>\n        <li>Fibroso<\/li>\n        <li>Acicular<\/li>\n        <li>Radial<\/li>\n        <li>Em agregados columnados ou maci\u00e7os<\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n  <tr>\n    <td>Cor:<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>Muito vari\u00e1vel, dependendo da composi\u00e7\u00e3o<\/li>\n        <li>Verde claro a escuro; Marrom; Preto; Azulado (ex: glauc\u00f3fano); Cinza<\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n  <tr>\n    <td>Brilho:<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>V\u00edtreo<\/li>\n        <li>Sedoso em variedades fibrosas<\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n  <tr>\n    <td>Dureza (Mohs):<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>5 a 6<\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n  <tr>\n    <td>Densidade Relativa:<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>2,9 a 3,6<br>\n          <span style=\"font-size: 0.9em;\">(Dependendo da composi\u00e7\u00e3o, especialmente do teor de ferro)<\/span>\n        <\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n  <tr>\n    <td>Clivagem:<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>Perfeita em duas dire\u00e7\u00f5es formando \u00e2ngulos de aproximadamente 56\u00b0 e 124\u00b0<\/li>\n        <li>Caracter\u00edstica diagn\u00f3stica dos anfib\u00f3lios<\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n  <tr>\n    <td>Fratura:<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>Irregular a fibrosa<\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n<\/table>\n\n\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    Os anfib\u00f3lios s\u00e3o comuns em rochas metam\u00f3rficas (como xistos verdes, anfibolitos, m\u00e1rmores impuros) e tamb\u00e9m ocorrem em algumas rochas \u00edgneas (como dioritos, andesitos e granitos). Formam-se sob condi\u00e7\u00f5es variadas de press\u00e3o e temperatura, sendo excelentes indicadores metam\u00f3rficos.\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> Algumas variedades fibrosas de anfib\u00f3lios (como tremolita e actinolita) foram usadas como asbesto em materiais isolantes e resistentes ao calor. Hoje, seu uso \u00e9 restrito ou proibido devido a graves riscos \u00e0 sa\u00fade (como asbestose e mesotelioma).<\/li>\n  <li><strong>Cient\u00edfico:<\/strong> Importantes em estudos de petrologia metam\u00f3rfica e \u00edgnea como minerais indicativos de condi\u00e7\u00f5es P-T.<\/li>\n  <li><strong>Colecionismo:<\/strong> Cristais bem formados e agregados fibrosos, aciculares ou radiados de membros espec\u00edficos (ex: hornblenda, glauc\u00f3fano, actinolita) s\u00e3o procurados por colecionadores.<\/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 Presente em diversos estados, principalmente em Minas Gerais, Bahia, Goi\u00e1s e Rio de Janeiro (em contextos metam\u00f3rficos e \u00edgneos)<\/li>\n  <li><strong>Estados Unidos<\/strong> \u2013 Nova York, Calif\u00f3rnia, Montana<\/li>\n  <li><strong>Canad\u00e1<\/strong> \u2013 Qu\u00e9bec, Ont\u00e1rio<\/li>\n  <li><strong>It\u00e1lia, Noruega e Su\u00ed\u00e7a<\/strong> \u2013 importantes \u00e1reas alpinas com grande variedade de anfib\u00f3lios<\/li>\n  <li><strong>\u00c1frica do Sul e Austr\u00e1lia<\/strong> \u2013 dep\u00f3sitos ricos em rochas ultram\u00e1ficas e metam\u00f3rficas<\/li>\n<\/ul>\n\n<hr class=\"custom-divider\">\n<\/div>\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\/06\/Anfibolio-2.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" data-id=\"1274\" src=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-2-1024x1024.png\" alt=\"\" class=\"wp-image-1274\" srcset=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-2-1024x1024.png 1024w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-2-300x300.png 300w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-2-150x150.png 150w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-2-768x768.png 768w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-2-200x200.png 200w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-2-70x70.png 70w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-2.png 1440w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-3.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" data-id=\"1275\" src=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-3-1024x1024.png\" alt=\"\" class=\"wp-image-1275\" srcset=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-3-1024x1024.png 1024w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-3-300x300.png 300w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-3-150x150.png 150w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-3-768x768.png 768w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-3-200x200.png 200w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-3-70x70.png 70w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-3.png 1440w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-4.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" data-id=\"1277\" src=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-4-1024x1024.png\" alt=\"\" class=\"wp-image-1277\" srcset=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-4-1024x1024.png 1024w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-4-300x300.png 300w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-4-150x150.png 150w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-4-768x768.png 768w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-4-200x200.png 200w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-4-70x70.png 70w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-4.png 1440w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-5.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" data-id=\"1276\" src=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-5-1024x1024.png\" alt=\"\" class=\"wp-image-1276\" srcset=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-5-1024x1024.png 1024w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-5-300x300.png 300w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-5-150x150.png 150w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-5-768x768.png 768w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-5-200x200.png 200w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-5-70x70.png 70w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-5.png 1440w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-6.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" data-id=\"1278\" src=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-6-1024x1024.png\" alt=\"\" class=\"wp-image-1278\" srcset=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-6-1024x1024.png 1024w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-6-300x300.png 300w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-6-150x150.png 150w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-6-768x768.png 768w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-6-200x200.png 200w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-6-70x70.png 70w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-6.png 1440w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" data-id=\"1279\" src=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-1024x1024.png\" alt=\"\" class=\"wp-image-1279\" srcset=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-1024x1024.png 1024w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-300x300.png 300w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-150x150.png 150w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-768x768.png 768w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-200x200.png 200w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio-70x70.png 70w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Anfibolio.png 1440w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n<\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Os anfib\u00f3lios s\u00e3o minerais silicatos complexos com h\u00e1bito prism\u00e1tico ou fibroso, comuns em rochas metam\u00f3rficas e \u00edgneas. Possuem clivagem t\u00edpica em 56\u00b0 e 124\u00b0, e incluem minerais como tremolita, actinolita e hornblenda. Variedades fibrosas foram usadas como asbesto, mas hoje t\u00eam uso restrito. S\u00e3o importantes indicadores de condi\u00e7\u00f5es metam\u00f3rficas.<\/p>\n","protected":false},"author":2,"featured_media":1278,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[41],"tags":[],"class_list":["post-1268","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-inossilicatos"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Anfib\u00f3lio (Amphibole) - Museu de Rochas e Minerais<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/anfibolio\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Anfib\u00f3lio (Amphibole) - Museu de Rochas e Minerais\" \/>\n<meta property=\"og:description\" content=\"Os anfib\u00f3lios s\u00e3o minerais silicatos complexos com h\u00e1bito prism\u00e1tico ou fibroso, comuns em rochas metam\u00f3rficas e \u00edgneas. Possuem clivagem t\u00edpica em 56\u00b0 e 124\u00b0, e incluem minerais como tremolita, actinolita e hornblenda. Variedades fibrosas foram usadas como asbesto, mas hoje t\u00eam uso restrito. 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