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Pb10As6S19 (?)
After Frank Guiterman, Metallurgist and Chemist, of Denver, Colorado, USA
Uncertain material, apparently a mixture of jordanite and another, similar mineral phase.

Originally reported from Zuni Mine (Zuñi Mine), Anvil Mountain, Silverton, Silverton District, San Juan Co., Colorado, USA.

Classification of Guitermanite

Not Approved
Explanation of status:
XRD of type material showed jordanite lines. Polished section showed jordanite and mixture with similar unknown material. URL:
Please feel free to link to this page.

Physical Properties of Guitermanite

Diaphaneity (Transparency):
Hardness (Mohs):

Chemical Properties of Guitermanite

Pb10As6S19 (?)
Essential elements:
All elements listed in formula:

Other Names for Guitermanite

Name in Other Languages:

Other Information

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 Guitermanite

Reference List:
Hillebrand, W.F. (1885): On zunyite and guitermanite, two new minerals from Colorado. Proceedings of the Colorado Scientific Society 1, 124-131.

Palache, Charles, Harry Berman & Clifford Frondel (1944): The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged: 401.

Eckel, E. B. (1961): Minerals of Colorado: A 100-year record. USGS Bulletin 1114, 399 pp.

Internet Links for Guitermanite

Localities for Guitermanite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
  • Colorado
    • San Juan Co.
      • Red Mountain District
        • Anvil Mountain
Hillebrand, W.F. (1885): On zunyite and guitermanite, two new minerals from Colorado. Proceedings of the Colorado Scientific Society 1, 124-131.; A. Rosenzweig (1957) Mineralogical Notes on the Silverton Quadrangle, Colorado. in 8th Field Conference New Mexico Geological Society. pp. 199-202; Rocks & Minerals 71:2, 94-101;
  • New York
    • St. Lawrence Co.
      • Balmat-Edwards Zinc District
NY State Museum spec. no.
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