• 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.. The type locality is Oehrenstock (Öhrenstock), Ilmenau, Thuringian Forest, Thuringia ...
  • 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 General Hausmannite Information : Chemical Formula: Mn++Mn+++2O4 : Composition: Molecular Weight = 228.81 gm Manganese 72.03 % Mn 103.50 % Mn 2 O 3: Oxygen 27.97 % O: 100.00 % 103.50 % = TOTAL OXIDE
  • 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 (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 - Raven Crystals

    www.ravencrystals.com/HAUSMANNITE_df_1148.html Hausmannite facilitates a deeper state of meditation. Hausmannite is also known as a “stone of security.” Hausmannite is a stone that supports manifestation and attracting love. Hausmannite balances one’s emotions with reason, encourages trust of one’s intuitive feelings, and provides clarity in situations.
  • Tuning the morphological, structural, optical and ...

    www.sciencedirect.com/science/article/pii/S0749603620302433 The XRD patterns show that all the characterized films are polycrystalline with the hausmannite (Mn 3 O 4) structure. The entity of diffraction planes of (311), (211), (422) and (511) describes the formation of tetragonal Hausmannite Mn 3 O 4 (JCPDS 00-024-0734) crystal structure.
  • 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 - Crystal Classics

    www.crystalclassics.co.uk/product/hausmannite A very rich and rare specimen for the location of Hausmannite from the Wyndham Pit, Bigrigg, Cumbria. Lots of cavities in the massive Hausmannite are lined with black lustrous octahedral crystals to 2mm, associated with spots of creamy Dolomite.