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Hydrohausmannite

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Colour:
Brownish black, iron black
Lustre:
Sub-Vitreous, Resinous, Earthy
Hardness:
1
Name:
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
Transparency:
Opaque
Colour:
Brownish black, iron black
Streak:
Brown
Hardness:
Comment:
Soft
Tenacity:
Brittle
Parting:
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

ⓘ - 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.
China
 
  • Yunnan Province
    • Dali Autonomous Prefecture
      • Heqing Co.
Zhangxiang Peng (1990): Geology and Prospecting 26(10), 14-18
India
 
  • 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.
Japan
 
  • Honshu Island
    • Chugoku Region
      • Yamaguchi Prefecture
        • 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
    • Tohoku Region
      • Iwate Prefecture
        • Kunohe-gun
          • Noda-mura
Watanabe, T. (1959) Mineralogical Journal, 2, 6, 408-421
Sweden (FRL)
 
  • Värmland
    • Filipstad
Frondel, C. (1953): New manganese oxides: hydrohausmannite and woodruffite. American Mineralogist 38, 761-769.
USA
 
  • Michigan
www.deq.state.mi.us/documents/deq-glm-rcim-geology-Minerals_Found_In_Michigan.Pdf.
  • New Jersey
    • Sussex Co.
      • Franklin mining district
        • Franklin
Frondel, C. (1953): New manganese oxides: hydrohausmannite and woodruffite. American Mineralogist 38, 761-769.
Mineral and/or Locality  
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