• Hausmannite - Wikipedia

    en.wikipedia.org/wiki/Hausmannite Hausmannite is a complex oxide of manganese containing both di-and tri-valent manganese. The formula can be represented as Mn 2+ Mn 3+ 2 O 4. It belongs to the spinel group and forms tetragonal crystals. Hausmannite is a brown to black metallic mineral with Mohs hardness of 5.5 and a specific gravity of 4.8.
  • Hausmannite: Mineral information, data and localities.

    www.mindat.org/min-1832.html Hausmannite has a tetragonal distorted spinel structure (due to the Jahn-Teller distortion of the Mn 3+-centred polyhedron). When heated above 1473 K, a cubic high-temperature phase appears (Frenzel 1980). Hausmannite generally forms black granular aggregates or, relatively rare, pseudo-octahedral crystals.
  • Hausmannite | mineral | Britannica

    www.britannica.com/science/hausmannite Hausmannite, a manganese oxide mineral (Mn2+Mn3+2O4) that occurs as brownish black crystals or granular masses in high-temperature hydrothermal veins and in contact metamorphic zones. It is found associated with other oxide minerals of manganese and other metals at Ilmenau, Ger.; LĂ„ngban, Swed.;
  • Hausmannite - definition of hausmannite by The Free Dictionary

    www.thefreedictionary.com/hausmannite Define hausmannite. hausmannite synonyms, hausmannite pronunciation, hausmannite translation, English dictionary definition of hausmannite. Noun 1. hausmannite - a mineral consisting of manganese tetroxide; a source of manganese atomic number 25, manganese, Mn - a hard brittle grey polyvalent...
  • HAUSMANNITE (Manganese Oxide) - Amethyst Galleries

    www.galleries.com/Hausmannite Ergo, hausmannite has a distorted spinel structure that produces a tetragonal symmetry and a basal cleavage not possible in the spinel group of minerals. At much higher temperatures, the structure of hausmannite converts to the isometric spinel structure. Hausmannite is an interesting, and can be (when well-formed) a first-rate mineral specimen.
  • Hausmannite | Definition of Hausmannite by Merriam-Webster

    www.merriam-webster.com/dictionary/hausmannite Hausmannite definition is - an opaque mineral Mn3O4 consisting of manganese tetroxide found commonly in brownish black tetragonal crystals.
  • Hausmannite mineral information and data

    www.dakotamatrix.com/mineralpedia/5974/hausmannite Hausmannite occurs in hydrothermal veins and also forms from the metamorphism of manganese-rich rocks. Localities for Hausmannite include Germany, Sweden, Wales, England, the United States, Canada, Brazil, Australia, South Africa, and Namibia, and others including some of economic importance.
  • Hausmannite Mineral Data

    webmineral.com/data/Hausmannite.shtml PE Hausmannite = 19.02 barns/electron U=PE Hausmannite x rElectron Density= 84.86 barns/cc. Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units) Hausmannite is Not Radioactive
  • Hausmannite synonyms, hausmannite antonyms - FreeThesaurus.com

    www.freethesaurus.com/hausmannite Synonyms for hausmannite in Free Thesaurus. Antonyms for hausmannite. 5 words related to hausmannite: atomic number 25, manganese, Mn, mineral, manganese tetroxide. What are synonyms for hausmannite?
  • Hausmannite

    www.mindat.org/gm/1832 Hausmannite from N'Chwaning II Mine, Kuruman, Kalahari desert This specimen shows parallel growths on a single axis, so typical of the finds from N'Chwanning. The tetrahedral crystals are brilliant with very well defined faces and edges, and a brilliant surface.