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Gillardite

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Formula:
Cu
 
3
Ni(OH)
 
6
Cl
 
2
System:Trigonal
Member of:Atacamite Group
Isostructural with:Herbertsmithite


Atacamite Group.
Closely related to paratacamite.

At least some of the gillardite from the type locality was originally considered to be "Ni-bearing paratacamite".

Classification of Gillardite

IMA status:Approved 2007
Nickel-Strunz 10th (pending) edition ID:3.DA.10c

3 : HALIDES
D : Oxyhalides, hydroxyhalides and related double halides
A : With Cu, etc., without Pb
Dana 8th edition ID:10.1.2.4

10 : OXYHALIDES AND HYDROXYHALIDES
1 : A2(O,OH)3Xq
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Type Occurrence of Gillardite

Type Locality:132 North Mine, Widgiemooltha, Coolgardie Shire, Western Australia, Australia

Crystallography of Gillardite

Crystal System:Trigonal
Class (H-M):3m (3 2/m) - Hexagonal Scalenohedral
Space Group:R3m {R3 2/m}
Cell Parameters:a = 6.8364Å, c = 13.8459Å
Ratio:a:c = 1 : 2.025
Unit Cell Volume:V 560.41 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
d-spacingIntensity
5.463 (100)
4.651 (16)
4.519 (11)
2.903 (19)
2.755 (69)
2.728 (14)
2.257 (39)
1.820 (13)

Chemical Properties of Gillardite

Formula:
Cu
 
3
Ni(OH)
 
6
Cl
 
2
Essential elements:Cl, Cu, H, Ni, O
All elements listed in formula:Cl, Cu, H, Ni, O

Relationship of Gillardite to other Species

Member of:Atacamite Group
Other Members of Group:

- +
Anatacamite
Cu
 
2
Cl(OH)
 
3
Atacamite
Cu
 
2
(OH)
 
3
Cl
Botallackite
Cu
 
2
(OH)
 
3
Cl
Clinoatacamite
Cu
 
2
(OH)
 
3
Cl
Haydeeite
Cu
 
3
Mg(OH)
 
6
Cl
 
2
Herbertsmithite
Cu
 
3
Zn(OH)
 
6
Cl
 
2
Kapellasite
Cu
 
3
Zn(OH)
 
6
Cl
 
2
Paratacamite
Cu
 
3
(Cu,Zn)(OH)
 
6
Cl
 
2
Related Minerals - Nickel-Strunz Grouping):

- +
3.DA.05Melanothallite
Cu
 
2
Cl
 
2
O
3.DA.10aAtacamite
Cu
 
2
(OH)
 
3
Cl
3.DA.10bBotallackite
Cu
 
2
(OH)
 
3
Cl
3.DA.10bClinoatacamite
Cu
 
2
(OH)
 
3
Cl
3.DA.10aHibbingite
Fe
2+
2
(OH)
 
3
Cl
3.DA.10aKempite
Mn
2+
2
(OH)
 
3
Cl
3.DA.10cParatacamite
Cu
 
3
(Cu,Zn)(OH)
 
6
Cl
 
2
3.DA.10bBelloite
Cu(OH)Cl
3.DA.10cHerbertsmithite
Cu
 
3
Zn(OH)
 
6
Cl
 
2
3.DA.10cKapellasite
Cu
 
3
Zn(OH)
 
6
Cl
 
2
3.DA.10cHaydeeite
Cu
 
3
Mg(OH)
 
6
Cl
 
2
3.DA.10dAnatacamite
Cu
 
2
Cl(OH)
 
3
3.DA.15Claringbullite
Cu
 
4
(OH)
 
7
Cl · nH
 
2
O
3.DA.15Barlowite
Cu
 
4
BrF(OH)
 
6
3.DA.20Simonkolleite
Zn
 
5
Cl
 
2
(OH)
 
8
· H
 
2
O
3.DA.25Buttgenbachite
Cu
 
19
(NO
 
3
)
 
2
(OH)
 
32
Cl
 
4
· 2H
 
2
O
3.DA.25Connellite
Cu
 
19
(SO
 
4
)(OH)
 
32
Cl
 
4
· 3H
 
2
O
3.DA.30Abhurite
Sn
 
21
Cl
 
16
(OH)
 
14
O
 
6
3.DA.35Ponomarevite
K
 
4
Cu
 
4
Cl
 
10
O
3.DA.40Anthonyite
Cu(OH,Cl)
 
2
· 3H
 
2
O
3.DA.40Calumetite
Cu(OH,Cl)
 
2
· 2H
 
2
O
3.DA.45Khaidarkanite
Na
 
0.34
Cu
 
4
Al
 
3
(OH)
 
14
F
 
3
· 2H
 
2
O
3.DA.50Bobkingite
Cu
 
5
Cl
 
2
(OH)
 
8
· 2H
 
2
O
3.DA.55Avdoninite
K
 
2
Cu
 
5
(OH)
 
4
Cl
 
8
· H
 
2
O
3.DA.60Droninoite
Ni
 
6
Fe
32+
(
OH)
 
16
Cl
 
2
· 4H
 
2
O

Other Names for Gillardite

Synonyms:
IMA2006-041
Other Languages:

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Gillardite

Reference List:

- +
Clissold, M.E., et al. (2007): The structure of gillardite, the Ni-analog of herbertsmithite, from Widgiemooltha, Western Australia. Can. Mineral. 45, 317-330. [abstr. Am. Min. 93, 252 (2008)]

Colchester, D. M., et al. (2007): Gillardite, CuNiCl2(OH)6, a new mineral from the 132 North deposit, Widgiemooltha, Western Australia: Australian J. Mineralogy 13(1), 15-17.

Internet Links for Gillardite

Search Engines:
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  • External Links:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
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  • Specimens:The following Gillardite specimens are currently listed for sale on minfind.com.
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  • Localities for Gillardite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Australia
     
    • Western Australia
      • Coolgardie Shire
        • Widgiemooltha
    Australian J. Mineralogy 13(1), 15-17(2007)
    Germany
     
    • Saxony-Anhalt
      • Stassfurt Potash Deposit
        • Bernburg
    Witzke, T. (2012): Gillardit, Cu3Ni(OH)6Cl2, und Avdoninit, K2Cu5Cl8(OH)4 • H2O, zwei Neufunde von Bernburg, Sachsen-Anhalt. Aufschluss 63, 209-211.
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