Ferricopiapite Mineral Data

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General Ferricopiapite Information

Chemical Formula:

Fe+++2/3Fe+++4(SO4)6(OH)2•20(H2O)

Composition:

Molecular Weight = 1,231.32 gm

Iron 21.17 % Fe 30.26 % Fe₂O₃

Hydrogen 3.44 % H 30.72 % H₂O

Sulfur 15.63 % S 39.01 % SO₃

Oxygen 59.77 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Fe³⁺_0.66Fe³⁺₄(SO₄)₆(OH)₂•20(H₂O)

Environment:

Secondary mineral formed typically by the weathering and oxidation of iron sulfide in a wide range of rock types, preserved in arid climates.

IMA Status:

Valid Species (Pre-IMA) 1938

Locality:

Challant-St. Anselme mine, Italy. Link to MinDat.org Location Data.

Name Origin:

Named for the ferric iron member of the copiapite group.

Name Pronunciation:

Ferricopiapite

Ferricopiapite Image

Images:

Ferricopiapite

Comments: Earthy, yellow ferricopiapite, variety chalcanthite.
Location: Bisbee, Cochise County, Arizona, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Images:

Ferricopiapite Goldichite Coquimbite

Comments: Prismatic to fibrous crystals of goldichite on white massive coquimbite with yellow ferricopiapite.
Location: Dexter No. 7 Mine, Calf Mesa, San Rafael Swell, Emery County, Utah, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ferricopiapite Crystallography

Axial Ratios:

a:b:c =0.4027:1:0.3989

Cell Dimensions:

a = 7.394, b = 18.36, c = 7.324, Z = 1; alpha = 93.8°, beta = 102.2°, gamma = 98.9° V = 958.00 Den(Calc)= 2.13

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 9.06(1), 3.58(0.8), 5.58(0.8),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Majzlan J , Navrotsky A , McCleskey R B , Alpers C N , European Journal of Mineralogy , 18 (2006) p.175-186, Thermodynamic properties and crystal structure refinement of, ferricopiapite, coquimbite, rhomboclase, and Fe2(SO4)3(H2O)5, Locality: synthetic

Physical Properties of Ferricopiapite

Cleavage:

{???} Perfect

Color:

Yellow, Orange.

Density:

2.1

Diaphaneity:

Transparent to Translucent

Hardness:

2.5-3 - Finger Nail-Calcite

Luster:

Pearly

Streak:

light yellow

Optical Properties of Ferricopiapite

Gladstone-Dale:

CI meas= -0.058 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.039 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2792,KPDmeas= 0.2845,KC= 0.2688
Ncalc = 1.56 - 1.58

Optical Data:

Biaxial (+), a=1.575, g=1.62, bire=0.0450, 2V(Meas)=74.

Calculated Properties of Ferricopiapite

Electron Density:

Bulk Density (Electron Density)=2.18 gm/cc
note: Specific Gravity of Ferricopiapite =2.14 gm/cc.

Fermion Index:

Fermion Index = 0.0059510547
Boson Index = 0.9940489453

Photoelectric:

PE_{Ferricopiapite}= 7.09 barns/electron
U=PE_{Ferricopiapite} x rElectron Density= 15.46 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ferricopiapite is Not Radioactive

Ferricopiapite Classification

Dana Class:

31.10.05.04 (31)Hydrated Sulfates Containing Hydroxyl or Halogen

(31.10)miscellaneous

(31.10.05)Copiapite Group

31.10.05.01 Copiapite FeFe4(SO4)6(OH)2•20(H2O) P1 1

31.10.05.02 Magnesiocopiapite MgFe4(SO4)6(OH)2•20(H2O) P1 1

31.10.05.03 Cuprocopiapite CuFe4(SO4)6(OH)2•20(H2O) P1 1

31.10.05.04 Ferricopiapite Fe2/3Fe4(SO4)6(OH)2•20(H2O) P1 1

31.10.05.05 Calciocopiapite CaFe4(SO4)6(OH)2•19(H2O) P1 1

31.10.05.06 Zincocopiapite ZnFe4(SO4)6(OH)2•18(H2O) P1 1

31.10.05.07 Aluminocopiapite Al2/3Fe4(SO4)6O(OH)2•20(H2O) P1 1

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 Ferricopiapite Information

References:

NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Ferricopiapite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info

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Ferricopiapite

Fe+++2/3Fe+++4(SO4)6(OH)2•20(H2O)
Dana No: 31.10.05.04 Strunz No: 07.DB.35
Locality:

Notes: