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 IMA Status: IMA Status: Valid Species (Pre-IMA) 1862
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Synonym: Synonym: ICSD 68352
  PDF 17-471
 

Corkite Image

Click Here for Larger Corkite Image in a New Browser Window Images:
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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 PyramidalH-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),
Click Here for Large Corkite Structure Window Crystal Structure:

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Help on Above


Giuseppe G , Tadini C , Neues Jahrbuch fur Mineralogie, Monatshefte , 1987 (1987) p.71-81, Corkite, PbFe3(SO4)(PO4)(OH)6, its crystal structure and ordered, arrangement of the tetrahedral cations, Note: this is the prefered structure of these authors, Locality: Dernbach, Hessen-Nassau, Germany

 

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 Diaphaniety: Diaphaniety: 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
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:

relectron=3.97 gm/cc
note: rCorkite =4.30 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.0744
Boson Index = 0.9256
Help on Photoelectric: Photoelectric:

PECorkite = 523.15 barns/electron
U=PECorkite x relectron=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: 43.4.1.2 (43)Compound Phosphates, etc.
  (43.4)(Anhydrous Compound Anions With Hydroxyl or Halogen)
  (43.4.1)Dana Group
 
43.4.1.1 Beudantite PbFe3(AsO4)(SO4)(OH)6 R 3m 3 2/m
 
43.4.1.2 Corkite PbFe3(PO4)(SO4)(OH)6 R 3m 3m
 
43.4.1.3 Hidalgoite PbAl3(AsO4)(SO4)(OH)6 R 3m 3 2/m
 
43.4.1.4 Orpheite PbAl3(PO4,SO4)2(OH)6(?) R 3m 3 2/m
 
43.4.1.5 Hinsdalite (Pb,Sr)Al3(PO4)(SO4)(OH)6 R 3m 3 2/m
 
43.4.1.6 Svanbergite SrAl3(PO4)(SO4)(OH)6 R 3m 3 2/m
 
43.4.1.7 Kemmlitzite (Sr,Ce)Al3(AsO4)(SO4)(OH)6 R 3m 3 2/m
 
43.4.1.8 Woodhouseite CaAl3(PO4)(SO4)(OH)6 R 3m 3 2/m
 
43.4.1.9 Weilerite BaAl3H[(As,P)O4]2(OH)6 R 3m 3 2/m
 
43.4.1.10 Gallobeudantite! PbGa3[(AsO4),(SO4)]2(OH)6 R 3m 3m
Help on  Strunz Class: Strunz Class: VII/B.35-80 VII - Phosphates, Arsenates and Vanadates
  VII/B - Waterfree phosphates with unfamiliar anions F, Cl, O, OH. cations of medium and big size: Mg, Cu, Zn, and Ca, Na, K, Ba, Pb
  VII/B.35 - Beudantite group
 
VII/B.35-10 Schlossmacherite (H3O,Ca)Al3(AsO4,SO4)2(OH)6 R 3m 3 2/m
 
VII/B.35-20 Woodhouseite CaAl3(PO4)(SO4)(OH)6 R 3m 3 2/m
 
VII/B.35-30 Svanbergite SrAl3(PO4)(SO4)(OH)6 R 3m 3 2/m
 
VII/B.35-40 Kemmlitzite (Sr,Ce)Al3(AsO4)(SO4)(OH)6 R 3m 3 2/m
 
VII/B.35-60 Hinsdalite (Pb,Sr)Al3(PO4)(SO4)(OH)6 R 3m 3 2/m
 
VII/B.35-65 Orpheite PbAl3(PO4,SO4)2(OH)6(?) R 3m 3 2/m
 
VII/B.35-70 Hidalgoite PbAl3(AsO4)(SO4)(OH)6 R 3m 3 2/m
 
VII/B.35-75 Gallobeudantite! PbGa3[(AsO4),(SO4)]2(OH)6 R 3m 3m
 
VII/B.35-80 Corkite PbFe3(PO4)(SO4)(OH)6 R 3m 3m
 
VII/B.35-90 Beudantite PbFe3(AsO4)(SO4)(OH)6 R 3m 3 2/m
 

Other Corkite Information

Help on References: References: 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 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Print or Cut-and-Paste your Corkite Specimen Label here :

Corkite

PbFe+++3(PO4)(SO4)(OH)6
Dana No: 43.4.1.2 Strunz No: VII/B.35-80
Locality:

 

Notes:

 

 
   
 
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