page_title: Melanophlogite
hierarchical_section_title: Melanophlogite
caption_attribution_description: English: Melanophlogite Locality&#160;: Fortullino, Rosignano Marittimo, Livorno Province, Tuscany, Italy Size&#160;: View 1.5x1cm Français&#160;: Mélanophlogite Localité&#160;: Fortullino, Rosignano Marittimo, Province de Livourne, Toscane, Italie Vue 1.5x1cm
context_page_description: Melanophlogite is a rare silicate mineral and a polymorph of silica. It has a zeolite-like porous structure which results in relatively low and not well-defined values of its density and refractive index. Melanophlogite often overgrows crystals of sulfur or calcite and typically contains a few percent of organic and sulfur compounds. Darkening of organics in melanophlogite upon heating is a possible origin of its name, which comes from the Greek for "black" and "to be burned".
context_section_description: Melanophlogite (MEP) is a rare silicate mineral and a polymorph of silica (SiO₂). It has a zeolite-like porous structure which results in relatively low and not well-defined values of its density and refractive index. Melanophlogite often overgrows crystals of sulfur or calcite and typically contains a few percent of organic and sulfur compounds. Darkening of organics in melanophlogite upon heating is a possible origin of its name, which comes from the Greek for "black" and "to be burned".
caption: 1–3 mm globules of melanophlogite
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