Mineralogy Database

Callaghanite Mineral Data

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General Callaghanite Information

Help on Chemical  Formula: Chemical Formula: Cu2Mg2(CO3)(OH)6•2(H2O)
Help on Composition: Composition: Molecular Weight = 373.79 gm
   Magnesium  13.00 %  Mg   21.57 % MgO
   Copper     34.00 %  Cu   42.56 % CuO
   Hydrogen    2.70 %  H    24.10 % H2O
   Carbon      3.21 %  C    11.77 % CO2
   Oxygen     47.08 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Cu2Mg2(CO3)(OH)6•2(H2O)
Help on Environment: Environment: Disseminated in the contact zone between diorite and serpentinized dolostone.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1954
Help on Locality: Locality: Gabbs, Gabbs district, Nye Co., Nevada, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Eugene Callaghan (1904-1990), Director of the New Mexico Bureau of Mines, Socorro, New Mexico, USA.
Help on Synonym: Synonym: ICSD 28268
  PDF 11-332

Callaghanite Image

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Comments: Blue crystals of callaghanite on matrix.
Location: Gabbs, Nevada, USA. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Callaghanite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.8525:1:0.6983
Help on Cell Dimensions: Cell Dimensions: a = 10.06, b = 11.8, c = 8.24, Z = 4; beta = 107.3° V = 933.90 Den(Calc)= 2.66
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 6.17(1), 7.45(1), 3.87(0.9),

Physical Properties of Callaghanite

Help on Cleavage: Cleavage: {111} Perfect, {111} Perfect
Help on Color: Color: Azure, Violet blue.
Help on Density: Density: 2.71
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Hardness: Hardness: 3-3.5 - Calcite-Copper Penny
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Callaghanite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.047 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.067 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2371,KPDmeas= 0.2327,KC= 0.2223
Ncalc = 1.59 - 1.6
Help on Optical Data: Optical Data: Biaxial (-), a=1.559, b=1.653, g=1.68, bire=0.1210, 2V(Calc)=52, 2V(Meas)=55.

Calculated Properties of Callaghanite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.70 gm/cc
note: Specific Gravity of Callaghanite =2.71 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PECallaghanite = 14.80 barns/electron
U=PECallaghanite x rElectron Density= 39.92 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Callaghanite is Not Radioactive

Callaghanite Classification

Help on  Dana Class: Dana Class: 16b.05.01.01 (16b)Carbonates - Hydroxyl or Halogen
  (16b.05)with miscellaneous formulae
  (16b.05.01)Dana Group
16b.05.01.01 Callaghanite Cu2Mg2(CO3)(OH)6•2(H2O) C 2/c 2/m
Help on  Strunz Class: Strunz Class: 05.DA.25 05 - CARBONATES (NITRATES)
  05.D - Carbonates with Additional Anions, with H2O
  05.DA -With medium-sized cations
05.DA.25 Callaghanite Cu2Mg2(CO3)(OH)6•2(H2O) C 2/c 2/m

Other Callaghanite Information

Help on References: References: NAME( AntBidBlaNic3) 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 Callaghanite :
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 - HyperPhysics
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info

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Dana No: 16b.05.01.01 Strunz No: 05.DA.25





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