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Brownish black, iron black
Sub-Vitreous, Resinous, Earthy
A synthetic hausmannite-like compound was named in 1945 by Walter Feitknecht and W. Marti for its containing hydroxyl. In 1953, naturally-occurring material was named hydrohausmannite by Clifford Frondel. Type material from Franklin, New Jersey, was shown to be a mixture of Hausmannite and Feitknechtite by Bricker (1965).
The original natural "hydrohausmannite" is a pseudomorph of pyrochroite containing feitknechtite and hausmannite. The replacement may be incomplete and relict pyrochroite may be present.

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Physical Properties of HydrohausmanniteHide

Sub-Vitreous, Resinous, Earthy
Brownish black, iron black
Parting parallel to pyrochroite cleavage planes {0001}

First Recorded Occurrence of HydrohausmanniteHide

General Appearance of First Recorded Material:
bundles and fan-like groupings of tiny dark brown needles
Geological Setting of First Recorded Material:
Solution cavities in zinc ore
Associated Minerals at First Recorded Locality:

Synonyms of HydrohausmanniteHide

Other Language Names for HydrohausmanniteHide

Fluorescence of HydrohausmanniteHide

Not fluorescent in UV

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for HydrohausmanniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Frondel, C. (1953): New manganese oxides: hydrohausmannite and woodruffite. American Mineralogist 38, 761-769.
Bricker, Owen (1965) Some Stability Relations in the System Mn-O2-H2O at 25° and One Atmosphere Total Pressure, American Mineralogist, v. 50, p. 1296-1354.

Internet Links for HydrohausmanniteHide

Localities for HydrohausmanniteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • Yunnan
    • Dali
      • Heqing County
Zhangxiang Peng (1990): Geology and Prospecting 26(10), 14-18
  • Karnataka
    • Bellary District
      • Bellary-Hospet iron belt
        • Sandur
Rao, J. S. R. K., Naidu, B. V. & Rao, K. V. (1979): Ore microscopic, x-ray and trace elemental data on manganese ores from Sandur, Karnataka, India. Acta Mineralogica-Petrographica 24, 91-97.
  • Iwate
    • Kunohe-gun
      • Noda-mura
Watanabe, T. (1959) Mineralogical Journal, 2, 6, 408-421
  • Yamaguchi
    • Kudamatsu City
Fumitoshi HIROWATARI (1961) Minerals and Their Paragenetic Relations of the Manganese Deposits of Fukumaki Mine, Yamaguchi Prefecture. Bulletin of the Geological Survey of Japan Vol.12:565-572
Sweden (FRL)
  • Värmland County
    • Filipstad
Frondel, C. (1953): New manganese oxides: hydrohausmannite and woodruffite. American Mineralogist 38, 761-769.
  • Michigan
  • New Jersey
    • Sussex Co.
      • Franklin Mining District
        • Franklin
Frondel, C. (1953): New manganese oxides: hydrohausmannite and woodruffite. American Mineralogist 38, 761-769.
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