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Gillardite Mineral Data
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General Gillardite Information
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 Chemical Formula: |
Cu3NiCl2(OH)6 |
| Composition: |
Molecular Weight = 422.66 gm |
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Iron 0.05 % Fe 0.07 % FeO |
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Cobalt 0.17 % Co 0.21 % CoO |
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Copper 46.32 % Cu 52.15 % Cu2O |
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Nickel 12.54 % Ni 15.96 % NiO |
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Hydrogen 1.43 % H 12.79 % H2O |
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Chlorine 16.78 % Cl 16.78 % Cl |
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- %
Cl -3.79 % -O=Cl2 |
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Oxygen 22.71 % O |
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______ ______ |
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100.00 % 94.17 % = TOTAL OXIDE |
| Empirical Formula: |
Cu3.08Ni0.9Co0.01Fe2+0.004Cl2(OH)6 |
| Environment: |
Found in a silicified ferruginous gossan. Ni analog of herbertsmithite. Atacamite group. |
| IMA Status: |
Approved IMA 2006 (Dana # Added) |
| Locality: |
132 North deposit, Widgiemooltha, Western Australia, Australia Link to MinDat.org Location Data. |
| Name Origin: |
Named for Professor D. Gillard, in recognition of his contributions to the field of inorganic chemistry. |
| Synonym: |
IMA2006-041 |
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Gillardite Image |
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Images:
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Gillardite
Comments: Dark green druze of gillardite and lighter green gasphite in a complex gossenous matrix.
Location: 132 North Mine, Widgiemooltha, Western Australia, Australia.
Scale: Specimen Size 3.6 x 1.7 x 2.6 cm.
© Minservice |
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Gillardite Crystallography
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| Axial Ratios: |
a:c = 1:2.02532 |
| Cell Dimensions: |
a = 6.8364, c = 13.8459, Z = 3; V = 560.41 Den(Calc)= 3.76 |
| Crystal System: |
Trigonal - Rhombohedral H-M Symbol ( 3) Space Group: R 3m |
| X Ray Diffraction: |
By Intensity(I/Io): 5.463(1), 2.755(0.69), 2.257(0.39),2.903(0.19), 4.651(0.16), 2.728(0.14), 1.82(0.13), 4.519(0.11), |
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Physical Properties of Gillardite
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| Cleavage: |
{101} Good |
| Color: |
Dark green. |
| Diaphaneity: |
Transparent |
| Fracture: |
Splintery - Thin, elongated fractures produced by intersecting good cleavages or partings (e.g. hornblende). |
| Habit: |
Aggregates - Made of numerous individual crystals or clusters. |
| Habit: |
Triangular Crystals - Occurs as triangular shaped crystals. |
| Hardness: |
3 - Calcite |
| Luster: |
Vitreous (Glassy) |
| Streak: |
green |
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Optical Properties of Gillardite
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| Gladstone-Dale: |
CI calc= 0.099 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2226,KC= 0.2471
Ncalc = 1.93 |
| Optical Data: |
Biaxial (+), a=1.836, b=1.838, |
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Calculated Properties of Gillardite
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| Electron Density: |
Bulk Density (Electron Density)=3.61 gm/cc
note: Specific Gravity of Gillardite =3.76 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0015392622
Boson Index = 0.9984607378 |
| Photoelectric: |
PEGillardite = 26.58 barns/electron
U=PEGillardite x rElectron Density= 96.03 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Gillardite is Not Radioactive |
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Gillardite Classification
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| Dana Class: |
10.01.01.03 (10)Oxyhalides and Hydroxyhalides |
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(10.01)where (A)2 (O,OH)3 Xq |
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(10.01.01)Atacamite group |
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10.01.01.01 Atacamite Cu2Cl(OH)3 Pmcn 2/m 2/m 2/m |
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10.01.01.02 Hibbingite (Fe,Mg)2(OH)3Cl Pnam 2/m 2/m 2/m |
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10.01.01.03 Gillardite! Cu3NiCl2(OH)6 R 3m 3 |
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10.01.01.04 Haydeeite! Cu3Mg(OH)6Cl2 R 3m 3 |
| Strunz Class: |
03.DA.10c 03 - HALIDES |
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03.D - Oxyhalides, Hydroxyhalides and Related Double Halides |
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03.DA -With Cu, etc., without Pb |
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03.DA.10c Paratacamite (Cu,Zn)2(OH)3Cl R 3 3 |
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03.DA.10c Gillardite! Cu3NiCl2(OH)6 R 3m 3 |
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03.DA.10c Herbertsmithite! Cu3Zn(OH)6Cl2 R 3m 3 2/m |
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03.DA.10c Kapellasite! Cu3Zn(OH)6Cl2 P 3m1 3 2/m |
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03.DA.10c Haydeeite! Cu3Mg(OH)6Cl2 R 3m 3 |
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Other Gillardite Information
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| References: |
NAME( AmMin v93:252) PHYS. PROP.(AmMin v93:252, en.scientificcommons.org) OPTIC PROP.(en.scientificcommons.org) |
| See Also: |
Links to other databases for Gillardite :
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 Gillardite Specimen Label here :
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Gillardite
Cu3NiCl2(OH)6
Dana No: 10.01.01.03 Strunz No: 03.DA.10c
Locality:
Notes:
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