Aurichalcite Mineral Data + Say AURICHALCITE

General Aurichalcite Information

Help on Chemical  Formula: Chemical Formula: (Zn,Cu)5(CO3)2(OH)6
Help on Composition: Composition: Molecular Weight = 546.71 gm
   Zinc      44.85 %  Zn   55.83 % ZnO
   Copper    14.53 %  Cu   18.19 % CuO
   Hydrogen   1.11 %  H     9.89 % H2O
   Carbon     4.39 %  C    16.10 % CO2
   Oxygen    35.12 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Zn3.75Cu1.25(CO3)2(OH)6
Help on Environment: Environment: Secondary mineral in copper and zinc deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1839
Help on Locality: Locality: Salida, Chaffee Co., Colorado, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Probably from the Greek oreichalchos, "mountain copper."
Help on Synonym: Synonym: ICSD 75323
  PDF 17-743
 

Aurichalcite Image

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Aurichalcite

Comments: Sky-blue radiating acicular crystals of aurichalcite covering matrix.
Location: Lucin, Utah, USA. Scale: 6.5 x 3 x 2 cm with 5 mm crystals.
© Dan Weinrich

Aurichalcite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =2.1529:1:0.8241
Help on Cell Dimensions: Cell Dimensions: a = 13.82, b = 6.419, c = 5.29, Z = 2; beta = 101.04° V = 460.59 Den(Calc)= 3.94
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 6.78(1), 2.61(0.8), 3.68(0.7),
Click Here for Large Aurichalcite Structure Window Crystal Structure:

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Harding M M , Kariuki B M , Cernik R , Cressey G , Acta Crystallographica, Section B , 50 (1994) p.673-676, The structure of aurichalcite, (Cu,Zn)5(OH)6(CO3)2, determined from, a microcrystal

 

Physical Properties of Aurichalcite

Help on Cleavage: Cleavage: [010] Perfect
Help on Color: Color: Pale green, Sky blue, Greenish blue.
Help on Density: Density: 3.64 - 3.9, Average = 3.77
Help on Diaphaniety: Diaphaniety: Transparent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Druse - Crystal growth in a cavity which results in numerous crystal tipped surfaces.
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Hardness: Hardness: 2 - Gypsum
Help on Luminescence: Luminescence: None.
Help on Luster: Luster: Pearly
Help on Streak: Streak: light blue
 

Optical Properties of Aurichalcite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.013 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.031 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.181,KPDmeas= 0.1891,KC= 0.1867
Help on Optical Data: Optical Data: Biaxial (-), a=1.655, b=1.74, g=1.744, bire=0.0890, 2V(Calc)=22, 2V(Meas)=1-4. Dispersion relatively strong.
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): pale green.
Help on Pleochroism (z): Pleochroism (z): pale green.
 

Calculated Properties of Aurichalcite

Help on Electron Density: Electron Density:

relectron=3.62 gm/cc
note: rAurichalcite =3.77 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.01904
Boson Index = 0.98096
Help on Photoelectric: Photoelectric:

PEAurichalcite = 28.76 barns/electron
U=PEAurichalcite x relectron= 104.21 barns/cc.

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

Aurichalcite is Not Radioactive

 

Aurichalcite Classification

Help on  Dana Class: Dana Class: 16a.4.2.1 (16a)Carbonates - Hydroxyl or Halogen
  (16a.4)where (A B)5 (XO3)2 Zq
  (16a.4.2)Dana Group
 
16a.4.2.1 Aurichalcite (Zn,Cu)5(CO3)2(OH)6 P 21/m 2/m
Help on  Strunz Class: Strunz Class: V/C.01-110 V - Nitrates, Carbonates and Borates
  V/C - Waterfree carbonates with unfamiliar anions
  V/C.01 - Azurite - Rosasite group and related compounds
 
V/C.01-10 Azurite Cu3(CO3)2(OH)2 P 21/a 2/m
 
V/C.01-20 Malachite Cu2(CO3)(OH)2 P 21/a 2/m
 
V/C.01-25 Georgeite Cu5(CO3)3(OH)4·6(H2O) None
 
V/C.01-30 Pokrovskite Mg2(CO3)(OH)2·0.5(H2O) P 21/a 2/m
 
V/C.01-40 Mcguinnessite (Mg,Cu)2(CO3)(OH)2 P 2/a or P 21/a 2/m
 
V/C.01-50 Kolwezite (Cu,Co)2(CO3)(OH)2 P1 or P1 Tri
 
V/C.01-60 Glaukosphaerite (Cu,Ni)2(CO3)(OH)2 P 21/a 2/m
 
V/C.01-70 Nullaginite Ni2(CO3)(OH)2 P 21/m,P 21 Mono
 
V/C.01-80 Rosasite (Cu,Zn)2(CO3)(OH)2 P 21/a 2/m
 
V/C.01-90 Zincrosasite (Zn,Cu)2(CO3)(OH)2 P 21/a 2/m
 
V/C.01-100 Hydrozincite Zn5(CO3)2(OH)6 C 2/m 2/m
 
V/C.01-105 Brianyoungite Zn3(CO3,SO4)(OH)4 C 2/m 2/m
 
V/C.01-110 Aurichalcite (Zn,Cu)5(CO3)2(OH)6 P 21/m 2/m
 
V/C.01-120 Loseyite (Mn,Zn)7(CO3)2(OH)10 A2/a 2/m
 
V/C.01-130 Sclarite (Zn,Mg,Mn)4Zn3(CO3)2(OH)10 A2/a 2/m
 

Other Aurichalcite Information

Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Aurichalcite :
1 -Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 - Applied Mineralogy 4 -Athena 5 - Crocoite.com Mineral Locations 6 - EUROmin Project 7 - Franklin Minerals(Dunn) 8 - Franklin Minerals(Palache) 9 - Glendale Community College 10 -Google Images 11 -Google Scholar 12 -Handbook of Mineralogy (UofA) 13 -MinDAT 14 -MinMax(Deutsch) 15 -MinMax(English) 16 - Mineral and Gemstone Kingdom 17 -Mineralienatlas (Deutsch) 18 - Minerals of Wisconsin 19 - Philatelic Mineralogy 20 -QUT Mineral Atlas 21 - WWW-MINCRYST 22 - YupRocks 23 -École des Mines de Paris

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Aurichalcite

(Zn,Cu)5(CO3)2(OH)6
Dana No: 16a.4.2.1 Strunz No: V/C.01-110
Locality:

 

Notes:

 

 
   
 
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