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Orange-brown, reddish-brown, chocolate-brown
Reported as mineral "C", a part of composition of gummite (see also UM1956-02-SiO:CaHU); similar to wölsendorfite in terms of both PXRD pattern and chemistry. The PXRD pattern is also similar to that of schoepite. Colour resembles that of clarkeite.

From Mitchell County, North Carolina: Wiseman mine and McKinney mine; Easton, Pennsylvania (alteration of uraninite or uranoan thorianite); Newry, Maine.

Forms dense microcrystalline aggregates.

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Physical Properties of UM1956-01-O:HPbUHide

Orange-brown, reddish-brown, chocolate-brown

Chemical Properties of UM1956-01-O:HPbUHide


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 UM1956-01-O:HPbUHide

Reference List:
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Frondel, C. (1956): Mineral composition of gummite. American Mineralogist: 41: 539-568.
Smith, D.G.W., Nickel, E.H. (2007): A System of Codification for Unnamed Minerals: Report of the SubCommittee for Unnamed Minerals of the IMA Commission on New Minerals, Nomenclature and Classification. Canadian Mineralogist: 45: 983-1055; http://nrmima.nrm.se/Valid2009_03.pdf (2016)

Internet Links for UM1956-01-O:HPbUHide

Localities for UM1956-01-O:HPbUHide

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.
  • Maine
    • Oxford County
Frondel, C. (1956): Mineral composition of gummite. American Mineralogist: 41: 539-568
  • North Carolina
    • Mitchell Co.
      • Spruce Pine Mining District
        • Spruce Pine
          • Greasy Creek Township
Frondel, C. (1956): Mineral composition of gummite. American Mineralogist: 41: 539-568.
Frondel, C. (1956): Mineral composition of gummite. American Mineralogist: 41: 539-568.
  • Pennsylvania
    • Northampton Co.
Frondel, C. (1956): Mineral composition of gummite. American Mineralogist: 41: 539-568.
Mineral and/or Locality  
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