{"id":1684,"date":"2025-06-09T10:42:47","date_gmt":"2025-06-09T13:42:47","guid":{"rendered":"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/?p=1684"},"modified":"2025-10-22T10:24:36","modified_gmt":"2025-10-22T13:24:36","slug":"rondonita-rhodonite","status":"publish","type":"post","link":"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/rondonita-rhodonite\/","title":{"rendered":"Rodonita (Rhodonite)"},"content":{"rendered":"\n<p class=\"has-black-color has-text-color has-medium-font-size\">A rodonita (MnSiO\u2083) \u00e9 um mineral tricl\u00ednico, geralmente rosa a vermelho, com brilho v\u00edtreo a nacarado, dureza 5,5\u20136,5 e boa clivagem em duas dire\u00e7\u00f5es. Forma-se em rochas metam\u00f3rficas ricas em mangan\u00eas e \u00e9 associada a minerais como espessartina e rodocrosita. Usada como min\u00e9rio de mangan\u00eas, pigmento e gema, ocorre em locais como Minas Gerais, Estados Unidos e Su\u00e9cia.<\/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>Composi\u00e7\u00e3o Qu\u00edmica:<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>MnSiO\u2083<br>\n          <span style=\"font-size: 0.9em;\">(silicato de mangan\u00eas)<\/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>Tricl\u00ednico<\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n  <tr>\n    <td>H\u00e1bito:<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>Granular, maci\u00e7o, compacto ou tabular<\/li>\n        <li>Pode formar cristais prism\u00e1ticos achatados<\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n  <tr>\n    <td>Cor:<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>Rosa a vermelho<br>\n          <span style=\"font-size: 0.9em;\">(podendo apresentar manchas negras de \u00f3xidos de mangan\u00eas)<\/span>\n        <\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n  <tr>\n    <td>Brilho:<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>V\u00edtreo a nacarado<br>\n          <span style=\"font-size: 0.9em;\">(em superf\u00edcies de clivagem)<\/span>\n        <\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n  <tr>\n    <td>Dureza (Mohs):<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>5,5 \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>3,4 \u2013 3,7<\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n  <tr>\n    <td>Clivagem:<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>Boa em duas dire\u00e7\u00f5es<\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n  <tr>\n    <td>Fratura:<\/td>\n    <td>\n      <ul class=\"custom-square\">\n        <li>Irregular a conchoidal<\/li>\n      <\/ul>\n    <\/td>\n  <\/tr>\n<\/table>\n\n\n\n<!DOCTYPE html>\n<html lang=\"pt-BR\">\n<head>\n  <meta charset=\"UTF-8\" \/>\n  <meta name=\"viewport\" content=\"width=device-width, initial-scale=1\" \/>\n  <title>Museu de Rochas e Minerais &#8211; Visualizador 3D<\/title>\n  <meta name=\"description\" content=\"Uma visualiza\u00e7\u00e3o 3D interativa do Museu de Rochas e Minerais - Instituto de Geoci\u00eancias - UFRRJ. 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customAxesGroup.add(createAxis(basis_b.clone().multiplyScalar(axisLength), 0x00cc00)); \/\/ green\n    customAxesGroup.add(createAxis(basis_c.clone().multiplyScalar(axisLength), 0x0000cc)); \/\/ blue\n    customAxesGroup.renderOrder = 1;\n    scene.add(customAxesGroup);\n\n    \/\/ --- Text Labels (FontLoader + TextGeometry) ---\n    const axisLabels = [];\n    const millerLabels = [];\n    const millerLabelsGroup = new THREE.Group();\n    crystalGroup.add(millerLabelsGroup);\n\n    const fontLoader = new FontLoader();\n    fontLoader.load('https:\/\/esm.sh\/three@^0.163.0\/examples\/fonts\/helvetiker_regular.typeface.json', (font) => {\n      const createResponsiveLabel = (text, position, color, size = 0.3) => {\n        const textGeometry = new TextGeometry(text, {\n          font: font, size: size, height: 0.01, curveSegments: 4,\n        });\n        textGeometry.center();\n        const textMaterial = new THREE.MeshBasicMaterial({ color: color, depthTest: false, side: 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!millerLabelsGroup.visible);\n    });\n\n    document.getElementById('toggle-rotation-btn').addEventListener('click', () => {\n      controls.autoRotate = !controls.autoRotate;\n      document.getElementById('toggle-rotation-btn').classList.toggle('toggled-off', !controls.autoRotate);\n    });\n  <\/script>\n<\/body>\n<\/html>\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    A rodonita \u00e9 tipicamente formada em rochas metam\u00f3rficas de contato ou de baixo grau, ricas em mangan\u00eas. Pode ocorrer tamb\u00e9m em fil\u00f5es hidrotermais ou associada \u00e0 altera\u00e7\u00e3o de dep\u00f3sitos de mangan\u00eas. Frequentemente associada a minerais como espessartina, rodocrosita e pirolusita.\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> Utilizada como min\u00e9rio secund\u00e1rio de mangan\u00eas e, em menor escala, como mat\u00e9ria-prima para pigmentos cor-de-rosa.<\/li>\n  <li><strong>Cient\u00edfico:<\/strong> Importante para estudos geol\u00f3gicos envolvendo metamorfismo regional e de contato em ambientes ricos em mangan\u00eas.<\/li>\n  <li><strong>Gemol\u00f3gico:<\/strong> As variedades transl\u00facidas ou com cor rosa intensa s\u00e3o lapidadas como gemas ornamentais ou utilizadas em esculturas e objetos decorativos.<\/li>\n  <li><strong>Outros:<\/strong> Muito usada em cole\u00e7\u00f5es de minerais e artesanato mineral\u00f3gico. Tamb\u00e9m \u00e9 valorizada por suas propriedades simb\u00f3licas em cristaloterapia (embora sem base cient\u00edfica).<\/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 (Conselheiro Lafaiete, Itabira), S\u00e3o Paulo (Avar\u00e9)<\/li>\n  <li><strong>Estados Unidos<\/strong> \u2013 Massachusetts, Colorado<\/li>\n  <li><strong>Su\u00e9cia<\/strong> \u2013 Harstigen (um dos locais cl\u00e1ssicos da esp\u00e9cie)<\/li>\n  <li><strong>Austr\u00e1lia<\/strong> \u2013 Broken Hill<\/li>\n  <li><strong>R\u00fassia<\/strong> \u2013 Montes Urais<\/li>\n  <li><strong>Peru e \u00c1frica do Sul<\/strong> \u2013 Em dep\u00f3sitos de mangan\u00eas metamorfizados<\/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\/Rodonita.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" data-id=\"1688\" src=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Rodonita-1024x1024.png\" alt=\"\" class=\"wp-image-1688\" srcset=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Rodonita-1024x1024.png 1024w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Rodonita-300x300.png 300w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Rodonita-150x150.png 150w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Rodonita-768x768.png 768w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Rodonita-200x200.png 200w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Rodonita-70x70.png 70w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2025\/06\/Rodonita.png 1440w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">Rondonita MRM<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2015\/04\/rodonits.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"736\" data-id=\"446\" src=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2015\/04\/rodonits-1024x736.jpg\" alt=\"\" class=\"wp-image-446\" srcset=\"https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2015\/04\/rodonits-1024x736.jpg 1024w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2015\/04\/rodonits-300x215.jpg 300w, https:\/\/laboratorios.ufrrj.br\/mineraiserochas\/wp-content\/uploads\/sites\/2\/2015\/04\/rodonits.jpg 1282w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">Rodonita. Cole\u00e7\u00e3o Simon Bumistrov. UFRRJ<\/figcaption><\/figure>\n<\/figure>\n\n\n\n<script type=\"module\" src=\"https:\/\/unpkg.com\/@google\/model-viewer\/dist\/model-viewer.min.js\"><\/script>\n\n<model-viewer\n  src=\"https:\/\/cdn.jsdelivr.net\/gh\/mrmufrrj\/Minerais-3D\/Rodonita.glb\"\n  alt=\"Modelo 3D de Rodonita\"\n  auto-rotate\n  camera-controls\n  shadow-intensity=\"1\"\n  style=\"width: 100%; height: 500px; background-color: #fff; border-radius: 10px;\">\n<\/model-viewer>\n","protected":false},"excerpt":{"rendered":"<p>A rodonita (MnSiO\u2083) \u00e9 um mineral tricl\u00ednico, geralmente rosa a vermelho, com brilho v\u00edtreo a nacarado, dureza 5,5\u20136,5 e boa clivagem em [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":1688,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[41],"tags":[],"class_list":["post-1684","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 - 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