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Magnesiocopiapite Mineral Data

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General Magnesiocopiapite Information

Help on Chemical  Formula: Chemical Formula: MgFe+++4(SO4)6(OH)2•20(H2O)
Help on Composition: Composition: Molecular Weight = 1,218.39 gm
   Magnesium   1.99 %  Mg    3.31 % MgO
   Iron       18.33 %  Fe   26.21 % Fe2O3
   Hydrogen    3.47 %  H    31.05 % H2O
   Sulfur     15.79 %  S    39.43 % SO3
   Oxygen     60.41 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: MgFe3+4(SO4)6(OH)2•20(H2O)
Help on Environment: Environment: Secondary mineral, typically formed by oxidation of pyrite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1938
Help on Locality: Locality: Blythe, Riverside Co., and at the Redington mercury mine, Knoxville, Napa Co., California, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for its magnesium content and relation to copiapite.
Help on Name Pronunciation: Name Pronunciation: Magnesiocopiapite Say MAGNESIOCOPIAPITE
Help on Synonym: Synonym: ICSD 2917
  PDF 42-599
 

Magnesiocopiapite Image

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  Guildite   Magnesiocopiapite

Comments: Brown granular guildite with greenish yellow magnesiocopiapite.
Location: United Verde Mine, Jerome, Yavapai County, Arizona, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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  Magnesiocopiapite

Comments: Pale yellow opaque aggregate of magnesiocopiapite.
Location: Denver Mine, Santa Cruz County, Arizona, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Magnesiocopiapite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.4038:1:0.4005
Help on Cell Dimensions: Cell Dimensions: a = 7.33, b = 18.15, c = 7.27, Z = 1; alpha = 93.85°, beta = 101.5°, gamma = 99.383° V = 932.99 Den(Calc)= 2.17
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): 9.29(1), 18.57(0.9), 5.6(0.8),
 

Physical Properties of Magnesiocopiapite

Help on Cleavage: Cleavage: {010} Perfect, {101} Indistinct
Help on Color: Color: Green yellow, Yellow, Yellow green, Orange.
Help on Density: Density: 2.08 - 2.17, Average = 2.12
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Hardness: Hardness: 2.5-3 - Finger Nail-Calcite
Help on Luster: Luster: Pearly
Help on Streak: Streak: light yellow
 

Optical Properties of Magnesiocopiapite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.044 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.068 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2465,KPDmeas= 0.2529,KC= 0.2645
Ncalc = 1.55 - 1.58
Help on Optical Data: Optical Data: Biaxial (+), a=1.507, b=1.529, g=1.576, bire=0.0690, 2V(Calc)=72, 2V(Meas)=67.
 

Calculated Properties of Magnesiocopiapite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.17 gm/cc
note: Specific Gravity of Magnesiocopiapite =2.13 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0073612525
Boson Index = 0.9926387475
Help on Photoelectric: Photoelectric: PEMagnesiocopiapite = 6.32 barns/electron
U=PEMagnesiocopiapite x rElectron Density= 13.72 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Magnesiocopiapite is Not Radioactive
 

Magnesiocopiapite Classification

Help on  Dana Class: Dana Class: 31.10.05.02 (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
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 Magnesiocopiapite Information

Help on References: References: NAME( AntBidBlaNic5) 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 Magnesiocopiapite :
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 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Magnesiocopiapite

MgFe+++4(SO4)6(OH)2•20(H2O)
Dana No: 31.10.05.02 Strunz No: 07.DB.35
Locality:

 

Notes:

 

 
   
 


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