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Attikaite Mineral Data

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General Attikaite Information

Help on Chemical  Formula: Chemical Formula: Ca3Cu2Al2(AsO4)4(OH)4•2H2O
Help on Composition: Composition: Molecular Weight = 944.79 gm
   Calcium     12.47 %  Ca   17.45 % CaO
   Magnesium    0.10 %  Mg    0.17 % MgO
   Aluminum     5.63 %  Al   10.63 % Al2O3
   Iron         0.12 %  Fe    0.15 % FeO
   Copper      12.98 %  Cu   16.25 % CuO
   Arsenic     29.66 %  As   45.49 % As2O5
   Phosphorus   0.39 %  P     0.90 % P2O5
   Hydrogen     0.85 %  H     7.60 % H2O
   Sulfur       0.54 %  S     1.36 % SO3
   Oxygen      37.26 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2.94Cu1.93Al1.97Mg0.04Fe2+0.02As3.74S0.16P0.12O16.08(OH)3.87�2.05(H2O)
Help on Environment: Environment: Secondary mineral in copper and arsenic deposits.
Help on IMA Status: IMA Status: Approved IMA 2006 (Dana # Added)
Help on Locality: Locality: Christiana mine No. 132, Kamareza, Lavrion District, Atti� Prefecture, Greece. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Synonym: Synonym: IMA2006-017
 

Attikaite Image

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  Attikaite

Comments: Light blue crusts of attikaite on a gossenous matrix.
Location: Christiana Mine, Lavrion (Laurium) Mining District, Attica Peninsula, Greece. Scale: Picture size 5 mm.
© John Betts - Fine Minerals

Attikaite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.2208:1:2.7783
Help on Cell Dimensions: Cell Dimensions: a = 10.01, b = 8.199, c = 22.78, Z = 4; V = 1,869.60 Den(Calc)= 3.36
Help on Crystal System: Crystal System: Orthorhombic Space Group: Pban, Pbam or Pba2
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 22.8(1), 5.01(0.9), 2.78(0.7),11.36(0.6), 2.503(0.5), 3.38(0.5), 2.682(0.3), 2.292(0.2),
 

Physical Properties of Attikaite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Light blue, Greenish blue.
Help on Density: Density: 3.2
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Flexible - Flexible fragments.
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Hardness: Hardness: 2-2.5 - Gypsum-Finger Nail
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: pale blue
 

Optical Properties of Attikaite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.055 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.005 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1915,KPDmeas= 0.201,KC= 0.1905
Ncalc = 1.61 - 1.64
Help on Optical Data: Optical Data: Biaxial (-), a=1.642, b=1.644, g=1.644, bire=0.0020
 

Calculated Properties of Attikaite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.22 gm/cc
note: Specific Gravity of Attikaite =3.36 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0005171588
Boson Index = 0.9994828412
Help on Photoelectric: Photoelectric: PEAttikaite = 27.59 barns/electron
U=PEAttikaite x rElectron Density= 88.92 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Attikaite is Not Radioactive
 

Attikaite Classification

Help on  Dana Class: Dana Class: 42.06.05.03 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.06)where (AB)2 (XO4) Zq � x(H2O)
  (42.06.05)Dana Group
 
42.06.05.01 Strashimirite Cu8(AsO4)4(OH)4•5(H2O) P 2/m,P 2,Pm Mono
 
42.06.05.02 Arhbarite Cu2Mg(AsO4)(OH)3 P1 1
 
42.06.05.03 Attikaite! Ca3Cu2Al2(AsO4)4(OH)4•2H2O Pban, Pbam or Pba2 Ortho
Help on  Strunz Class: Strunz Class: 08.DJ.45 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DJ -With large and medium-sized cations, (OH, etc.):RO4 = 1:l
 
08.DJ.45 Attikaite! Ca3Cu2Al2(AsO4)4(OH)4•2H2O Pban, Pbam or Pba2 Ortho
 

Other Attikaite Information

Help on References: References: NAME( Geology of Ore Deposits, v49:720) PHYS. PROP.(Geology of Ore Deposits, v49:720) OPTIC PROP.(Geology of Ore Deposits, v49:720)
Help on See Also: See Also: Links to other databases for Attikaite :
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 Attikaite Specimen Label here :

Attikaite

Ca3Cu2Al2(AsO4)4(OH)4•2H2O
Dana No: 42.06.05.03 Strunz No: 08.DJ.45
Locality:

 

Notes:

 

 
   
 


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