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Barahonaite-(Fe) Mineral Data

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General Barahonaite-(Fe) Information

Help on Chemical  Formula: Chemical Formula: (Ca,Cu,Na,Fe+++,Al )12Fe+++2(AsO4)8(OH,Cl)x•nH2O
Help on Composition: Composition: Molecular Weight = 2,141.70 gm
   Sodium       1.54 %  Na    2.07 % Na2O
   Calcium      9.26 %  Ca   12.96 % CaO
   Magnesium    0.08 %  Mg    0.13 % MgO
   Aluminum     0.91 %  Al    1.71 % Al2O3
   Iron         9.65 %  Fe   13.79 % Fe2O3
   Copper       9.91 %  Cu   12.41 % CuO
   Silicon      0.10 %  Si    0.22 % SiO2
   Arsenic     26.87 %  As   41.21 % As2O5
   Phosphorus   0.23 %  P     0.53 % P2O5
   Hydrogen     1.56 %  H    13.97 % H2O
   Sulfur       0.12 %  S     0.30 % SO3
   Chlorine     0.91 %  Cl    0.91 % Cl
                 -   %   Cl   -0.21 % -O=Cl2   
   Oxygen      38.86 %  O
              ______        ______ 
              100.00 %      100.01 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca4.95Cu3.34Na1.43Mg0.07Fe3+1.7Al0.72Fe3+28(As0.96)8(P0.02)8(S0.01)8(Si0.01)8(O4)(OH)6.82 Cl0.55�13.2(H2O)
Help on Environment: Environment: Occurs in a small lens of sulfides that have been completely oxidized to supergene minerals. Smolianinovite group (?)
Help on IMA Status: IMA Status: Approved IMA 2006 (Dana # Added)
Help on Locality: Locality: Dolores prospect, Pastrana, Murcia Province, Spain Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Antonio Barahona of Madrid who recognized the potential of the Dolores site and provided the original specimens.
Help on Synonym: Synonym: IMA2006-052
 

Barahonaite-(Fe) Image

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  Barahonaite-(Fe)

Comments: SEM image of tapered aggregates of bladed barahonaite-(Fe). (CanMin, v46:205).
Location: Dolores prospect near the village of Pastrana, in the Province of Murcia of southeastern Spain. Scale: See Image.
© Canadian Mineralogist

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  Barahonaite-(Fe)   Conichalcite

Comments: Micro yellow, platy barahonaite-(Fe) crystals associated with green "beads" of conichalcite, yellowish, earthy arseniosiderite and micro olivenite crystals.
Location: Dolores prospect near the village of Pastrana, in the Province of Murcia of southeastern Spain. Scale: Specimen Size 6 x 4 x 2 cm.
© Tom Loomis / Dakota Matrix

Barahonaite-(Fe) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.4534:1:0.2356
Help on Cell Dimensions: Cell Dimensions: a = 10.172, b = 22.43, c = 5.286, Z = 2; beta = 93.09° V = 1,204.29 Den(Calc)= 5.91
Help on Crystal System: Crystal System: Monoclinic Space Group: P 2/a or Pa
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 22(1), 11.2(0.7), 2.763(0.3),2.541(0.2), 2.66(0.2), 3.345(0.2), 5.068(0.2),
 

Physical Properties of Barahonaite-(Fe)

Help on Color: Color: Greenish yellow.
Help on Density: Density: 3.03
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Rosette - Bundled tabular aggregates resembling rose flower petals.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white to pale yellow
 

Optical Properties of Barahonaite-(Fe)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.016 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.479 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1138,KPDmeas= 0.222,KC= 0.2186
Ncalc = 1.66 - 2.29
Help on Optical Data: Optical Data: Biaxial (-), a=1.664, b=1.677, g=1.677, bire=0.0130
 

Calculated Properties of Barahonaite-(Fe)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.93 gm/cc
note: Specific Gravity of Barahonaite-(Fe) =3.03 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0024967419
Boson Index = 0.9975032581
Help on Photoelectric: Photoelectric: PEBarahonaite-(Fe) = 26.58 barns/electron
U=PEBarahonaite-(Fe) x rElectron Density= 77.83 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Barahonaite-(Fe) is Not Radioactive
 

Barahonaite-(Fe) Classification

Help on  Dana Class: Dana Class: 40.05.08.03 (40)Hydrated Phosphates, etc
  (40.05)with miscellaneous formulae
  (40.05.08)Smolianinovite Group
 
40.05.08.01 Smolianinovite (Co,Ni,Mg,Ca)3(Fe,Al)2(AsO4)4•11(H2O) Unk Ortho
 
40.05.08.02 Fahleite Zn5CaFe2(AsO4)6•14(H2O) Unk Ortho
 
40.05.08.03 Barahonaite-(Fe)! (Ca,Cu,Na,Fe,Al)12Fe2(AsO4)8(OH,Cl)x•nH2O P 2/a or Pa Mono
 
40.05.08.04 Barahonaite-(Al)! (Ca,Cu,Na,Fe,Al)12Al2(AsO4)8(OH,Cl)x•nH2O P 2/a or Pa Mono
Help on  Strunz Class: Strunz Class: 08.CH.60 08 - PHOSPHATES, ARSENATES, VANADATES
  08.C - Phosphates without Additional Anions, with H2O
  08.CH -With large and medium-sized cations, RO4:H2O < 1:1
 
08.CH.60 Barahonaite-(Fe)! (Ca,Cu,Na,Fe,Al)12Fe2(AsO4)8(OH,Cl)x•nH2O P 2/a or Pa Mono
 
08.CH.60 Barahonaite-(Al)! (Ca,Cu,Na,Fe,Al)12Al2(AsO4)8(OH,Cl)x•nH2O P 2/a or Pa Mono
 

Other Barahonaite-(Fe) Information

Help on References: References: NAME( AmMin, v93:1941) PHYS. PROP.(AmMin, v93:1941) OPTIC PROP.(AmMin, v93:1941)
Help on See Also: See Also: Links to other databases for Barahonaite-(Fe) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Print or Cut-and-Paste your Barahonaite-(Fe) Specimen Label here :

Barahonaite-(Fe)

(Ca,Cu,Na,Fe+++,Al )12Fe+++2(AsO4)8(OH,Cl)x•nH2O
Dana No: 40.05.08.03 Strunz No: 08.CH.60
Locality:

 

Notes:

 

 
   
 


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