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Copiapite Mineral Data

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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 Name Pronunciation: Name Pronunciation: Copiapite + Pronunciation Say COPIAPITE
Help on Synonym: Synonym: ICSD 10276
  PDF 35-583

Copiapite Image

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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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  Rozenite   Ferrinatrite   Copiapite

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 - Pinacoidal H-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:

Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

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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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 Diaphaneity: Diaphaneity: 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: Non-fluorescent.
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= 0.002 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.025 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2557,KPDmeas= 0.2617,KC= 0.2622
Ncalc = 1.55 - 1.56
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.

Calculated Properties of Copiapite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.14 gm/cc
note: Specific Gravity of Copiapite =2.10 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.006178207
Boson Index = 0.993821793
Help on Photoelectric: Photoelectric: PECopiapite = 7.42 barns/electron
U=PECopiapite x rElectron Density= 15.85 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)Hydrated Sulfates Containing Hydroxyl or Halogen
  (31.10.05)Copiapite Group Copiapite FeFe4(SO4)6(OH)2•20(H2O) P1 1 Magnesiocopiapite MgFe4(SO4)6(OH)2•20(H2O) P1 1 Cuprocopiapite CuFe4(SO4)6(OH)2•20(H2O) P1 1 Ferricopiapite Fe2/3Fe4(SO4)6(OH)2•20(H2O) P1 1 Calciocopiapite CaFe4(SO4)6(OH)2•19(H2O) P1 1 Zincocopiapite ZnFe4(SO4)6(OH)2•18(H2O) P1 1 Aluminocopiapite Al2/3Fe4(SO4)6O(OH)2•20(H2O) P1 1
Help on  Strunz Class: Strunz Class: 07.DB.35 07 - SULFATES (SELENATES, TELLURATES)
  07.D - Sulfates (selenates, etc.) with additional anions, with H2O
  07.DB -With only medium-sized cations; insular octahedra and finite groups
07.DB.35 Aluminocopiapite Al2/3Fe4(SO4)6O(OH)2•20(H2O) P1 1
07.DB.35 Copiapite FeFe4(SO4)6(OH)2•20(H2O) P1 1
07.DB.35 Calciocopiapite CaFe4(SO4)6(OH)2•19(H2O) P1 1
07.DB.35 Cuprocopiapite CuFe4(SO4)6(OH)2•20(H2O) P1 1
07.DB.35 Ferricopiapite Fe2/3Fe4(SO4)6(OH)2•20(H2O) P1 1
07.DB.35 Magnesiocopiapite MgFe4(SO4)6(OH)2•20(H2O) P1 1
07.DB.35 Zincocopiapite ZnFe4(SO4)6(OH)2•18(H2O) P1 1

Other Copiapite Information

Help on See Also: See Also: Links to other databases for Copiapite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - CalTech Mineral Spectroscopy
5 - EUROmin Project
6 - Ecole des Mines de Paris
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - NSDL Reciprocal Net (JAVA)
15 - Online Mineral Museum
16 - QUT Mineral Atlas
17 - Ruff.Info

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


Dana No: Strunz No: 07.DB.35





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