Octahedrite

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Wiktionary, Creative Commons Attribution/Share-Alike License
  • n. The mineral anatase.
  • the GNU version of the Collaborative International Dictionary of English
  • n. Titanium dioxide occurring in acute octahedral crystals.
  • The Century Dictionary and Cyclopedia
  • n. Titanium dioxid, crystallizing in the tetragonal system, the fundamental and commonly occurring form being an acute square octahedron (whence the name); anatase.
  • n. A meteoric iron with octahedral structure, which is usually distinctly marked by the lamellæ of kamacite, tænite, and plessite, seen in the Widmannstättian figures. Most iron meteorites fall in this class. See meteorite.
  • Word Usage
    "Rutile is made up mostly of titanium dioxide with two rarer polymorphs anatase or octahedrite, which is a tetragonal mineral of pseudo-octahedral habit, and brookite, which is an orthorhombic mineral, the Doctor explained to her."