• 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 - 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 | 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.; Långban, Swed.;
  • Hausmannite Mineral Data

    webmineral.com/data/Hausmannite.shtml Baron V , Gutzmer J , Rundlof H , Tellgren R , American Mineralogist , 83 (1998) p.786-793, The influence of iron substitution on the magnetic properties of hausmannite,, Mn(Fe,Mn)2O4, Sample at T = 295 K, natural
  • 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 - 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 | Article about Hausmannite by The Free Dictionary

    encyclopedia2.thefreedictionary.com/Hausmannite Hausmannite forms in metamorphosed sedimentary, contact-metasomatic, and hydrothermal deposits of manganese ores. It is the chief ore-bearing mineral of some manganese deposits in the Urals, such as Sapal’skoe, and in Kazakhstan, such as Naizatas. The industrial importance of hausmannite ores is limited; they are used in ferrous metallurgy ...
  • Hausmannite Gem Guide and Properties Chart | JTV.com

    www.jtv.com/library/gemopedia/hausmannite Shop Hausmannite Sisk Gemology Reference Showcasing 200 gemstones in over 1,000 pages and accompanied by more than 2,000 photos, The Sisk Gemology Reference is a must-have in every collector’s library.
  • Category:Hausmannite - Wikimedia Commons

    commons.wikimedia.org/wiki/Category:Hausmannite Media in category "Hausmannite" The following 115 files are in this category, out of 115 total.