Copiapite Mineral Data + Say COPIAPITE

General Copiapite Information
Help on Chemical Formula: Chemical Formula: Fe++Fe+++4(SO4)6(OH)2·20(H2O)
Help on Composition: Composition: Molecular Weight = 1,249.94 gm
   Iron      22.34 %  Fe    5.75 % FeO / 25.55 % Fe2O3
   Hydrogen   3.39 %  H    30.27 % H2O
   Sulfur    15.39 %  S    38.43 % SO3
   Oxygen    58.88 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe2+Fe3+4(SO4)6(OH)2·20(H2O)
Help on Environment: Environment: Oxidized iron sulfide deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1833
Help on Locality: Locality: Copiapo, Chile. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its locality.
Help on Synonym: Synonym: ICSD 10276
  Janosite
  Misy
  PDF 35-583
 

Copiapite Image

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Copiapite

Comments: Brownish yellow tabular crystals of copiapite.
Location: Saghand, near Yazd, Yadz Province, Iran. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals
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Copiapite   Rozenite   Ferrinatrite

Comments: White powdery rozenite coating with yellow ferrinatrite on purple copiapite.
Location: Le Cetine Mine, Siena, Tuscany, Italy. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Copiapite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.3852:1:0.3933
Help on Cell Dimensions: Cell Dimensions: a = 7.227, b = 18.76, c = 7.379, Z = 1; alpha = 91.46°, beta = 102.18°, gamma = 98.95° V = 965.69 Den(Calc)= 2.15
Help on Crystal System: Crystal System: Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 9.23(1), 18.4(1), 5.57(0.7),
Help on Forms: Forms:

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Forms: [ 0 1 2] [ 1 2 0] [ 0 1 0] [ 1 0 1] [ 1 0 1] [ 1 0 0] [ 0 1 1] [ 0 0 1]

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Fanfani L , Nunzi A , Zanazzi P F , Zanzari A R , American Mineralogist , 58 (1973) p.314-322, The copiapite problem: The crystal structure of a ferrian copiapite

 

Physical Properties of Copiapite

Help on Cleavage: Cleavage: [010] Perfect
Help on Color: Color: Green, Green yellow, Yellow, Yellow green, Golden yellow.
Help on Density: Density: 2.1
Help on Diaphaniety: Diaphaniety: Translucent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Habit: Habit: Scaly - Morphology like fish scales.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luminescence: Luminescence: None.
Help on Luster: Luster: Pearly
Help on Magnetism: Magnetism: Magnetic
Help on Streak: Streak: pale yellow
 

Optical Properties of Copiapite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.041 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.017 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2557,KPDmeas= 0.2617,KC= 0.2514
Help on Optical Data: Optical Data: Biaxial (+), a=1.506-1.54, b=1.528-1.549, g=1.575-1.6, bire=0.0600-0.0690, 2V(Calc)=48-72, 2V(Meas)=45-74. Dispersion none.
Help on Pleochroism (x): Pleochroism (x): none.
Help on Pleochroism (y): Pleochroism (y): none.
Help on Pleochroism (z): Pleochroism (z): none.
 

Calculated Properties of Copiapite

Help on Electron Density: Electron Density:

relectron=2.19 gm/cc
note: rCopiapite =2.15 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.00617
Boson Index = 0.99383
Help on Photoelectric: Photoelectric:

PECopiapite = 7.42 barns/electron
U=PECopiapite x relectron= 16.23 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Copiapite is Not Radioactive
 

Copiapite Classification
Help on Dana Class: Dana Class: 31.10.5.1 (31)Hydrated Sulfates Containing Hydroxyl or Halogen
  (31.10)miscellaneous
  (31.10.5)Copiapite Group
 
31.10.5.1 Copiapite FeFe4(SO4)6(OH)2·20(H2O) P1 1
 
31.10.5.2 Magnesiocopiapite MgFe4(SO4)6(OH)2·20(H2O) P1 1
 
31.10.5.3 Cuprocopiapite CuFe4(SO4)6(OH)2·20(H2O) P1 1
 
31.10.5.4 Ferricopiapite Fe2/3Fe4(SO4)6(OH)2·20(H2O) P1 1
 
31.10.5.5 Calciocopiapite CaFe4(SO4)6(OH)2·19(H2O) P1 1
 
31.10.5.6 Zincocopiapite ZnFe4(SO4)6(OH)2·18(H2O) P1 1
 
31.10.5.7 Aluminocopiapite Al2/3Fe4(SO4)6O(OH)2·20(H2O) P1 1
Help on Strunz Class: Strunz Class: VI/D.10-50 VI - Sulfates,Chromates,Molybdates and Tungstates
  VI/D - Water-bearing sulfates with unfamiliar anions. cations of medium size
  VI/D.10 - Copiapite group, Botryogen - Chaidamuite
 
VI/D.10-10 Botryogen MgFe(SO4)2(OH)·7(H2O) P 21/n 2/m
 
VI/D.10-20 Zincobotryogen (Zn,Mg,Mn)Fe(SO4)2(OH)·7(H2O) P 21/n 2/m
 
VI/D.10-30 Calciocopiapite CaFe4(SO4)6(OH)2·19(H2O) P1 1
 
VI/D.10-40 Magnesiocopiapite MgFe4(SO4)6(OH)2·20(H2O) P1 1
 
VI/D.10-50 Copiapite FeFe4(SO4)6(OH)2·20(H2O) P1 1
 
VI/D.10-60 Cuprocopiapite CuFe4(SO4)6(OH)2·20(H2O) P1 1
 
VI/D.10-70 Zincocopiapite ZnFe4(SO4)6(OH)2·18(H2O) P1 1
 
VI/D.10-80 Aluminocopiapite Al2/3Fe4(SO4)6O(OH)2·20(H2O) P1 1
 
VI/D.10-90 Ferricopiapite Fe2/3Fe4(SO4)6(OH)2·20(H2O) P1 1
 
VI/D.10-100 Guildite CuFe(SO4)2(OH)·4(H2O) P 21/m 2/m
 
VI/D.10-110 Chaidamuite (Zn,Fe)Fe(SO4)2(OH)·4(H2O) P1 1
 

Other Copiapite Information
Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Copiapite :
1 -Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 - Applied Mineralogy 4 -Athena 5 - CalTech Mineral Spectroscopy 6 - Crocoite.com Mineral Locations 7 - EUROmin Project 8 -Google Images 9 -Google Scholar 10 -Handbook of Mineralogy (UofA) 11 -MinDAT 12 -MinMax(Deutsch) 13 -MinMax(English) 14 -Mineralienatlas (Deutsch) 15 -NSDL Reciprocal Net (JAVA) 16 -QUT Mineral Atlas 17 - WWW-MINCRYST 18 -École des Mines de Paris

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Copiapite

Fe++Fe+++4(SO4)6(OH)2·20(H2O)
Dana No: 31.10.5.1 Strunz No: VI/D.10-50
Locality:

 

Notes:

 
 
   
 
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