• 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 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.; 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 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 R060512 - RRUFF Database: Raman, X-ray ...

    rruff.info/hausmannite/names/asc/R060512 Name: Hausmannite RRUFF ID: R060512 Ideal Chemistry: Mn 2+ Mn 3+ 2 O 4 Locality: N'Chwaning II mine, Kalahari manganese field, northern Cape Province, Republic of South Africa Source: Michael Scott S100308 Owner: RRUFF Description: Group of black pseudo-octahedra with striations parallel to the (001) plane Status: The identification of this mineral has been confirmed by X-ray diffraction and ...
  • Haussmannize - definition of haussmannize by The Free ...

    www.thefreedictionary.com/haussmannize Disclaimer. All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only.
  • 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 - Mindat.org - Mines, Minerals and More

    www.mindat.org/gm/1832 Hausmannite and Andradite from N’Chwaning Mine, Kuruman, South Africa Size: 18.0 x 6.5 x 3.5 cm Weight: 225g This is an undamaged cabinet specimen of well-defined, sharp Hausmannite crystals (to 7.0 mm) on Andradite (massive and crystals to 5.0 mm).
  • Minerals | Free Full-Text | Structural Trends and Solid ...

    www.mdpi.com/2075-163X/9/6/343/htm The hausmannite sample-a used in this study is a black crystal that occurs with henritermierite garnet from Wessels X Mine, Kalahari manganese field (KMF), Northern Cape Province, South Africa. The hausmannite crystals are intergrown with tetragonal garnet, henritermierite, ideally Ca 3 Mn 2 [(SiO 4) 2 (O 4 H 4)] Σ3 . Sample-a was obtained ...