Mineralogy Database

Corkite Mineral Data

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General Corkite Information

Help on Chemical  Formula: Chemical Formula: PbFe+++3(PO4)(SO4)(OH)6
Help on Composition: Composition: Molecular Weight = 667.82 gm
   Iron        25.09 %  Fe   35.87 % Fe2O3
   Phosphorus   4.64 %  P    10.63 % P2O5
   Hydrogen     0.91 %  H     8.09 % H2O
   Lead        31.03 %  Pb   33.42 % PbO
   Sulfur       4.80 %  S    11.99 % SO3
   Oxygen      33.54 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: PbFe3+3(PO4)(SO4)(OH)6
Help on Environment: Environment: Secondary mineral formed at low temperatures or by weathering in oxidized hydrothermal base-metal deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1862
Help on Locality: Locality: Glandore iron mines, Co. Cork, Ireland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Synonym: Synonym: ICSD 68352
  PDF 17-471
 

Corkite Image

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  Corkite   Hinsdalite

Comments: Small brown rounded translucent crystals of corkite on darker brown botryoidal hinsdalite.
Location: Grube Schone Aussicht, near Dernbach, Montabaur, Rheinland-Pflaz, Germany. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Corkite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.30747
Help on Cell Dimensions: Cell Dimensions: a = 7.22, c = 16.66, Z = 3; V = 752.11 Den(Calc)= 4.42
Help on Crystal System: Crystal System: Trigonal - Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.03(1), 5.86(0.65), 2.237(0.55),
 

Physical Properties of Corkite

Help on Cleavage: Cleavage: {0001} Perfect
Help on Color: Color: Brownish yellow, Yellow green, Light yellow, Dark green.
Help on Density: Density: 4.295
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Hardness: Hardness: 3.5-4.5 - Between Copper Penny and Fluorite-Apatite
Help on Luster: Luster: Vitreous - Resinous
 

Optical Properties of Corkite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.04 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.067 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2104,KPDmeas= 0.2165,KC= 0.2256
Ncalc = 1.97 - 2
Help on Optical Data: Optical Data: Uniaxial (-), e=1.93, w=1.93, bire=0.0000.
 

Calculated Properties of Corkite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.97 gm/cc
note: Specific Gravity of Corkite =4.30 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.07
Boson Index = 0.93
Help on Photoelectric: Photoelectric: PECorkite = 523.15 barns/electron
U=PECorkite x rElectron Density=2,079.30 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Corkite is Not Radioactive
 

Corkite Classification

Help on  Dana Class: Dana Class: 43.04.01.02 (43)Compound Phosphates, etc.
  (43.04)(Anhydrous Compound Anions With Hydroxyl or Halogen)
  (43.04.01)Beudantite Group
 
43.04.01.01 Beudantite PbFe3(AsO4)(SO4)(OH)6 R 3m 3 2/m
 
43.04.01.02 Corkite PbFe3(PO4)(SO4)(OH)6 R 3m 3m
 
43.04.01.03 Hidalgoite PbAl3(AsO4)(SO4)(OH)6 R 3m 3 2/m
 
43.04.01.04 Orpheite PbAl3(PO4,SO4)2(OH)6(?) R 3m 3 2/m
 
43.04.01.05 Hinsdalite (Pb,Sr)Al3(PO4)(SO4)(OH)6 R 3m 3 2/m
 
43.04.01.06 Svanbergite SrAl3(PO4)(SO4)(OH)6 R 3m 3 2/m
 
43.04.01.07 Kemmlitzite (Sr,Ce)Al3(AsO4)(SO4)(OH)6 R 3m 3 2/m
 
43.04.01.08 Woodhouseite CaAl3(PO4)(SO4)(OH)6 R 3m 3 2/m
 
43.04.01.09 Weilerite BaAl3H[(As,P)O4]2(OH)6 R 3m 3 2/m
 
43.04.01.10 Gallobeudantite! PbGa3[(AsO4),(SO4)]2(OH)6 R 3m 3m
Help on  Strunz Class: Strunz Class: 08.BL.05 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BL -With medium-sized and large cations, (OH, etc.):RO4 = 3:1
 
08.BL.05 Beudantite PbFe3(AsO4)(SO4)(OH)6 R 3m 3 2/m
 
08.BL.05 Corkite PbFe3(PO4)(SO4)(OH)6 R 3m 3m
 
08.BL.05 Hidalgoite PbAl3(AsO4)(SO4)(OH)6 R 3m 3 2/m
 
08.BL.05 Gallobeudantite! PbGa3[(AsO4),(SO4)]2(OH)6 R 3m 3m
 
08.BL.05 Hinsdalite (Pb,Sr)Al3(PO4)(SO4)(OH)6 R 3m 3 2/m
 
08.BL.05 Kemmlitzite (Sr,Ce)Al3(AsO4)(SO4)(OH)6 R 3m 3 2/m
 
08.BL.05 Orpheite PbAl3(PO4,SO4)2(OH)6(?) R 3m 3 2/m
 
08.BL.05 Woodhouseite CaAl3(PO4)(SO4)(OH)6 R 3m 3 2/m
 
08.BL.05 Weilerite BaAl3H[(As,P)O4]2(OH)6 R 3m 3 2/m
 
08.BL.05 Svanbergite SrAl3(PO4)(SO4)(OH)6 R 3m 3 2/m
 

Other Corkite Information

Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Corkite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info
14 - WWW-MINCRYST

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Corkite

PbFe+++3(PO4)(SO4)(OH)6
Dana No: 43.04.01.02 Strunz No: 08.BL.05
Locality:

 

Notes:

 

 
   
 


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