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Glockerite

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Ridge Avenue and School Lane Quarries, East Falls, Fairmount Park, Philadelphia, Philadelphia Co., Pennsylvania, USA
© 2008, JGW




Formula:
Fe
3+
4
(SO
 
4
)(OH)
 
10
·1-3H
 
2
O ?
Colour:Brown, ocher-yellow, ...
Name:After Ernst Friedrich Glocker (1783-1858), German mineralogist.


A hydrated basic sulphate of ferric iron. Ill-defined with analyzes that vary widely. May best be regarded as an impure, hardened gel-mass of indefinate composition. Results from the oxidation of iron sulphides.

Classification of Glockerite

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Physical Properties of Glockerite

Lustre:Resinous, Dull, Earthy
Diaphaneity (Transparency):Translucent, Opaque
Colour:Brown, ocher-yellow, brown-black, black, dull green
Streak:Ocher-yellow to brown
Fracture:Irregular/Uneven, Conchoidal
Comment:Variable, low.

Crystallography of Glockerite

Morphology:Stalactitic; incrusting; earthy. Minute, intertwined red fibers (Silesia).

Chemical Properties of Glockerite

Formula:
Fe
3+
4
(SO
 
4
)(OH)
 
10
·1-3H
 
2
O ?
All elements listed in formula:Fe, H, O, S

Other Names for Glockerite

Synonyms:
HydroglockeritePittizite (of Beudant)Vitriol Ocher
Other Languages:
French:Fer sous-sulfaté terreux
German:Glockerit
Swedish:Vitriolocker

Other Information

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

References for Glockerite

Reference List:

- +
Berzelius (1816) Afhandl. Fys. Kem. Min.: 5: 157 (as Vitriolocker).

Berzelius, J.J. (1819) Nouveau système de Minèralogie. Translated from the Swedish. 8vo, Paris (as Fer sous-sulfaté terreux).

Beudant, F.S. (1824), Trailé élémentaire de Minéralogie, 8vo, Paris: 447 (as Pittizite).

Erdmann (1831) Journal für Chemie und Physik, Nuremberg: 62: 104.

Jordan (1836) Journal für praktische Chemie, Leipzig: 9: 95.

Naumann, C.F. (1855) Elemente der Mineralogie. Leipzig. 9 editions, 4th. ed.: 254 (as Glockerit).

Dana, E.S. (1892) System of Mineralogy, 6th. Edition, New York: 970.

Church (1895) Mineralogical Magazine: 11: 13.

Greenly (1919) Memoires of the Geological Survey of Great Britain: 2: 832 (as Hydroglockerite).

Larsen, E.S. (1921) The Microscopic Determination of the Nonopaque Minerals, First edition, USGS Bulletin 679: 80.

Eyerman cited in: Gordon, S.G. (1922) The Mineralogy of Pennsylvania. 255pp., Philadelphia.

Posnjak and Merwin (1922) Journal of the American Chemical Society: 44: 1965.

Hintze, Carl (1929) Handbuch der Mineralogie. Berlin and Leipzig. 6 volumes: 1 [3B]: 4441.

Vertushkov (1940) Mem. Soc. russe min.: 69: 485.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 587-588.

Internet Links for Glockerite

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    • Localities for Glockerite

    The 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.
    Hide Locality List
    (TL) indicates type locality. ? 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.
    Germany
     
    • Lower Saxony
      • Harz
        • Goslar
          • Rammelsberg
    		Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 588.
    Norway
     
    • Buskerud
    		Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 588.
    Sweden
     
    • Dalarna
    		Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 588.
    UK
     
    • Wales
      • Isle of Anglesey (Gwynedd; Anglesey)
        • Amlwch
    		Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 588.
    USA
     
    • Pennsylvania
      • Lancaster Co.
        • Bart Township
          • Gap
    		Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 588.
      • Philadelphia Co.
        • Philadelphia
          • Fairmount Park
            • East Falls
    		Gordon, Mineralogy of Pennsyvania, 1922 - p. 224
    Ref.: Gordon, S.G. (1922) "The Mineralogy of Pennsylvania," Special Publication No. 1, The Academy of Natural Sciences of Philadelphia: p. 125.
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