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Corkite

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Formula:
PbFe3(PO4)(SO4)(OH)6
System:
Trigonal
Colour:
Brown to light yellowish ...
Hardness:
3½ - 4½
Name:
Named in 1869 by Gilbert-Joseph Adam after the first occurrence at County Cork, Ireland.
The phosphate analogue of beudantite with which a complete solid-solution range exists. The ferric iron analogue of hinsdalite. Also forms a solid solution with kintoreite.

An uncommon, low-temperature, secondary mineral occurring in the oxidised zones of hydrothermal base-metal deposits.

Classification of Corkite

Approved, 'Grandfathered' (first described prior to 1959)
8.BL.05

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
L : With medium-sized and large cations, (OH, etc.):RO4 = 3:1
43.4.1.2

43 : COMPOUND PHOSPHATES, ETC.
4 : Anhydrous Compound Phosphates, etc·, Containing Hydroxyl or Halogen
22.3.23

22 : Phosphates, Arsenates or Vanadates with other Anions
3 : Phosphates, arsenates or vanadates with sulphates
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Type Occurrence of Corkite

Geological Setting of Type Material:
Manganese-Copper vein deposit
Associated Minerals at Type Locality:

Physical Properties of Corkite

Vitreous, Sub-Vitreous, Resinous, Waxy, Greasy
Diaphaneity (Transparency):
Transparent, Translucent
Colour:
Brown to light yellowish brown, pale yellow, yellowish green to dark green
Hardness (Mohs):
3½ - 4½
Tenacity:
Brittle
Cleavage:
Perfect
On {0001}, perfect.
Density:
4.295 g/cm3 (Measured)    4.31 g/cm3 (Calculated)

Crystallography of Corkite

Crystal System:
Trigonal
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Space Group:
R3m
Cell Parameters:
a = 7.3065(5) Å, c = 16.897(2) Å
Ratio:
a:c = 1 : 2.313
Unit Cell Volume:
V 781.2 ų
Z:
3
Morphology:
Pseudocubic. Crystals pseudocubic rhombohedral with prominent {1011}. Commonly in crusts, massive.
Comment:
Space group erroneously assumed to be R3m by Giuseppetti and Tadini (1987) (cell: 7.820, 16.821 A).
X-Ray Powder Diffraction Data:
d-spacingIntensity
5.86 (65)
3.61 (35)
3.03 (100)
2.793 (35)
2.508 (30)
2.237 (55)
1.482 (35)
Comments:
ICDD 17-471

Optical Data of Corkite

Type:
Uniaxial (-)
RI values:
nω = 1.930 nε = 1.930 n = 1.93 - 1.96
Birefringence:
0.03
Max Birefringence:
δ = 0.000
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Very High
Pleochroism:
Non-pleochroic
Comments:
Commonly anomalously biaxial, exhibiting lamellar structure.

Chemical Properties of Corkite

Formula:
PbFe3(PO4)(SO4)(OH)6
All elements listed in formula:

Relationship of Corkite to other Species

Series:
Forms a series with Hinsdalite (see here)
Forms a series with Kintoreite (see here)
Other Members of Group:
BeudantitePbFe3(AsO4)(SO4)(OH)6
GallobeudantitePbGa3(AsO4)(SO4)(OH)6
HidalgoitePbAl3(AsO4)(SO4)(OH)6
HinsdalitePbAl3(PO4)(SO4)(OH)6
KemmlitziteSrAl3(AsO4)(SO4)(OH)6
SvanbergiteSrAl3(PO4)(SO4)(OH)6
WeileriteBaAl3(AsO4)(SO4)(OH)6
WoodhouseiteCaAl3(PO4)(SO4)(OH)6
8.BL.05BeudantitePbFe3(AsO4)(SO4)(OH)6
8.BL.05HidalgoitePbAl3(AsO4)(SO4)(OH)6
8.BL.05HinsdalitePbAl3(PO4)(SO4)(OH)6
8.BL.05KemmlitziteSrAl3(AsO4)(SO4)(OH)6
8.BL.05SvanbergiteSrAl3(PO4)(SO4)(OH)6
8.BL.05WoodhouseiteCaAl3(PO4)(SO4)(OH)6
8.BL.05GallobeudantitePbGa3(AsO4)(SO4)(OH)6
8.BL.10ArsenogoyaziteSrAl3(AsO4)(AsO3OH)(OH)6
8.BL.10ArsenogorceixiteBaAl3(AsO4)(AsO3OH)(OH)6
8.BL.10ArsenocrandalliteCaAl3(AsO4)(AsO3OH)(OH)6
8.BL.10BenauiteSrFe33+(HPO4,PO4)2(OH)6
8.BL.10CrandalliteCaAl3(PO4)(PO3OH)(OH)6
8.BL.10DussertiteBaFe33+(AsO4)(AsO3OH)(OH)6
8.BL.10EylettersiteTh0.75Al3(PO4)2(OH)6
8.BL.10GorceixiteBaAl3(PO4)(PO3OH)(OH)6
8.BL.10GoyaziteSrAl3(PO4)(PO3OH)(OH)6
8.BL.10KintoreitePbFe3(PO4)(PO3OH)(OH)6
8.BL.10PhilipsbornitePbAl3(AsO4)2(OH)5 · H2O
8.BL.10PlumbogummitePbAl3(PO4)(PO3OH)(OH)6
8.BL.10SegnititePbFe33+(AsO4)2(OH,H2O)6
8.BL.10SpringcreekiteBaV33+(PO4)2(OH,H2O)6
8.BL.13Arsenoflorencite-(La)LaAl3(AsO4)2(OH)6
8.BL.13Arsenoflorencite-(Nd)NdAl3(AsO4)2(OH)6
8.BL.13Arsenoflorencite-(Ce)CeAl3(AsO4)2(OH)6
8.BL.13Florencite-(Ce)CeAl3(PO4)2(OH)6
8.BL.13Florencite-(La)LaAl3(PO4)2(OH)6
8.BL.13Florencite-(Nd)NdAl3(PO4)2(OH)6
8.BL.13WaylanditeBiAl3(PO4)2(OH)6
8.BL.13ZaïriteBiFe33+(PO4)2(OH)6
8.BL.13ArsenowaylanditeBiAl3(AsO4)2(OH)6
8.BL.13Graulichite-(Ce)CeFe33+(AsO4)2(OH)6
8.BL.13Florencite-(Sm)SmAl3(PO4)2(OH)6
8.BL.15ViitaniemiiteNa(Ca,Mn2+)Al(PO4)(F,OH)3
8.BL.25PattersonitePbFe33+(PO4)2(OH)5 · H2O
22.3.1ParnauiteCu9(AsO4)2(SO4)(OH)10 · 7H2O
22.3.2ArdealiteCa2(HPO4)(SO4) · 4H2O
22.3.3Machatschkiite(Ca,Na)6(AsO4)(HAsO4)3(PO4,SO4) · 15H2O
22.3.4ClinotyroliteCa2Cu9(AsO4,SO4)4(OH,O)10 · 10H2O
22.3.5PeisleyiteNa2Al9[(P,S)O4]8(OH)6•28H2O
22.3.6ChalcophylliteCu18Al2(SO4)3(AsO4)3(OH)27 · 33H2O
22.3.7WoodhouseiteCaAl3(PO4)(SO4)(OH)6
22.3.8Schlossmacherite(H3O)Al3(SO4)2(OH)6
22.3.9SvanbergiteSrAl3(PO4)(SO4)(OH)6
22.3.10KemmlitziteSrAl3(AsO4)(SO4)(OH)6
22.3.11SanjuaniteAl2(PO4)(SO4)(OH) · 9H2O
22.3.12KribergiteAl5(PO4)3(SO4)(OH)4 · 4H2O
22.3.13HotsoniteAl11(SO4)3(PO4)2(OH)21 · 16H2O
22.3.14WeileriteBaAl3(AsO4)(SO4)(OH)6
22.3.15TsumebitePb2Cu(PO4)(SO4)(OH)
22.3.16ArsentsumebitePb2Cu(AsO4)(SO4)(OH)
22.3.17HinsdalitePbAl3(PO4)(SO4)(OH)6
22.3.18HidalgoitePbAl3(AsO4)(SO4)(OH)6
22.3.19Orpheite
22.3.20CoconinoiteFe23+Al2(UO2)2(PO4)4(SO4)(OH)2 · 20H2O
22.3.21Sasaite(Al,Fe3+)14(PO4)11(SO4)(OH)7 · 83H2O
22.3.22Tristramite(Ca,U,Fe)(PO4,SO4) · 2H2O
22.3.24BeudantitePbFe3(AsO4)(SO4)(OH)6
22.3.25DiadochiteFe23+(PO4)(SO4)(OH) · 5H2O
22.3.26SarmientiteFe23+(AsO4)(SO4)(OH) · 5H2O
22.3.27BukovskýiteFe23+(AsO4)(SO4)(OH) · 9H2O
22.3.28ZýkaiteFe43+(AsO4)3(SO4)(OH) · 15H2O
22.3.29TooeleiteFe63+(As3+O3)4(SO4)(OH)4 · 4H2O
22.3.30Pitticite(Fe, SO4, AsO4, H2O) ?
22.3.31Xiangjiangite(Fe3+,Al)(UO2)4(PO4)2(SO4)2(OH) · 22H2O

Other Names for Corkite

Name in Other Languages:

Other Information

Other Information:
Readily soluble in warm HCl.
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 Corkite

Reference List:
Dauber (1857) Annalen der Physik, Halle, Leipzig: 100: 579 (as Beudantite).

Rammelsberg (1857) Annalen der Physik, Halle, Leipzig: 100: 581.

Sandberger (1857) Annalen der Physik, Halle, Leipzig: 100: 611.

Adam, M. (1869) Tableau minéralogique, Paris: 49 (as Dernbachite, Bleirosite).

Hartley (1900) Mineralogical Magazine: 12: 234.

Miers (1900) Mineralogical Magazine: 12: 242.

Butler and Schaller (1911) American Journal of Science: 32: 418.

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

Chukhrov (1940) Imperial Academy of Sciences, St. Petersburg, C.r.: 27: 246.

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.: 1002-1003.

Giuseppetti, G. and C. Tadini (1987) Corkite, PbFe3(S04)(P04)(OH)6, its crystal structure and ordered arrangement of the tetrahedral cations. Neues Jahrbuch für Mineralogie, Monatshefte (1987): 71-81.

Sato, E., Nakai, I., Miyawaki, R. & Matsubara, S. (2009): Crystal structures of alunite family minerals: beaverite, corkite, alunite, natroalunite, jarosite, svanbergite, and woodhouseite. Neues Jahrbuch für Mineralogie Abhandlungen 185, 313-322.

Internet Links for Corkite

Specimens:
The following Corkite specimens are currently listed for sale on minfind.com.

Localities for Corkite

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.
Mineral and/or Locality  
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