Clinoatacamite Mineral Data


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General Clinoatacamite Information

Help on Chemical  Formula: Chemical Formula: Cu2(OH)3Cl
Help on Composition: Composition: Molecular Weight = 213.57 gm
   Copper    59.51 %  Cu   74.49 % CuO
   Hydrogen   1.42 %  H    12.65 % H2O
   Chlorine  16.60 %  Cl   16.60 % Cl
               -   %  Cl   -3.75 % -O=Cl2
   Oxygen    22.47 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Cu2(OH)3Cl
Help on Environment: Environment: Secondary alteration product of copper ores.
Help on IMA Status: IMA Status: Approved IMA 1996 (Dana # Added)
Help on Locality: Locality: Chuquicamata, Chile. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For the relationship to atacamite and paratacamite. Atacamite is named after the Atacam desert province in northern Chile.
Help on Synonym: Synonym: ICSD 82485
  IMA1993-060
  PDF 25-1427
 

Clinoatacamite Image

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Clinoatacamite

Comments: Green clinoatacamite on halite and anhydrite.
Location: Bernburg, Stassfurt Deposit, Saxony-Anhalt, Germany. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Clinoatacamite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.9035:1:1.336
Help on Cell Dimensions: Cell Dimensions: a = 6.157, b = 6.814, c = 9.104, Z = 4; beta = 99.65° V = 376.54 Den(Calc)= 3.77
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/n
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 5.47(1), 2.742(0.7), 2.767(0.6),
Click Here for Large Clinoatacamite Structure Window Crystal Structure:

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Grice J D , Szymanski J T , Jambor J L , The Canadian Mineralogist , 34 (1996) p.73-78, The crystal structure of clinoatacamite, a new polymorph of Cu2(OH)3Cl

 

Physical Properties of Clinoatacamite

Help on Cleavage: Cleavage: [012] Perfect
Help on Color: Color: Green, Dark greenish black, Greenish blue.
Help on Density: Density: 3.71
Help on Diaphaniety: Diaphaniety: Transparent to translucent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Crystalline - Fine - Occurs as well-formed fine sized crystals.
Help on Hardness: Hardness: 3 - Calcite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Adamantine
Help on Streak: Streak: greenish white
 

Optical Properties of Clinoatacamite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.036 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.019 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2263,KPDmeas= 0.23,KC= 0.2221
Help on Optical Data: Optical Data: Biaxial (-), a=1.83, b=1.85, g=1.88, bire=0.0500, 2V(Calc)=80, 2V(Meas)=75. Dispersion strong, r < v.
 

Calculated Properties of Clinoatacamite

Help on Electron Density: Electron Density:

relectron=3.60 gm/cc
note: rClinoatacamite =3.77 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00011
Boson Index = 0.99989
Help on Photoelectric: Photoelectric:

PEClinoatacamite = 27.37 barns/electron
U=PEClinoatacamite x relectron= 98.57 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Clinoatacamite is Not Radioactive

 

Clinoatacamite Classification

Help on  Dana Class: Dana Class: 10.1.2.2 (10)Oxyhalides and Hydroxyhalides
  (10.1)where (A)2 (O,OH)3 Xq
  (10.1.2)Dana Group
 
10.1.2.1 Paratacamite (Cu,Zn)2(OH)3Cl R 3 3
 
10.1.2.2 Clinoatacamite ! Cu2(OH)3Cl P 21/n 2/m
 
10.1.2.3 Herbertsmithite! Cu3Zn(OH)6Cl2 R 3m 3 2/m
Help on  Strunz Class: Strunz Class: III/D.01-40 III - Halogenides
  III/D - Oxi-halogenides with Mg - Mn - Cu - Zn - Sn
  III/D.01 - Atacamite series, Korshunovskite - Anthonyite
 
III/D.01-10 Korshunovskite Mg2Cl(OH)3·3.5-4(H2O) P1 or P1 Tri
 
III/D.01-12 Nepskoeite! Mg4Cl(OH)7·6(H2O) Pcmm,Pcm2,Pc2m Ortho
 
III/D.01-15 Hibbingite (Fe,Mg)2(OH)3Cl Pnam 2/m 2/m 2/m
 
III/D.01-20 Kempite Mn2Cl(OH)3 Pnam 2/m 2/m 2/m
 
III/D.01-25 Belloite! Cu(OH)Cl P 21/a 2/m
 
III/D.01-30 Atacamite Cu2Cl(OH)3 Pmcn 2/m 2/m 2/m
 
III/D.01-40 Clinoatacamite Cu2(OH)3Cl P 21/n 2/m
 
III/D.01-50 Botallackite Cu2Cl(OH)3 P 21/m 2/m
 
III/D.01-55 Paratacamite (Cu,Zn)2(OH)3Cl R 3 3
 
III/D.01-57 Herbertsmithite! Cu3Zn(OH)6Cl2 R 3m 3 2/m
 
III/D.01-60 Melanothallite Cu2OCl2 F ddd 2/m 2/m 2/m
 
III/D.01-65 Bobkingite! Cu5Cl2(OH)8(H2O)2 C 2/m 2/m
 
III/D.01-70 Calumetite Cu(OH,Cl)2·2(H2O) Unk Ortho
 
III/D.01-80 Anthonyite Cu(OH,Cl)2·3(H2O) Unk. Mono
 

Other Clinoatacamite Information

Help on References: References: NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.81,p1282,1996) OPTIC PROP.(MinRec)
Help on See Also: See Also: Links to other databases for Clinoatacamite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST

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

Clinoatacamite

Cu2(OH)3Cl
Dana No: 10.1.2.2 Strunz No: III/D.01-40
Locality:

 

Notes:

 

 
   
 
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