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Leverettite

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About LeverettiteHide

Formula:
Cu3Co(OH)6Cl2
Colour:
Medium to deep green
Lustre:
Vitreous
Hardness:
3
Specific Gravity:
3.64
Crystal System:
Trigonal
Member of:
Name:
In honour of Professor Peter Leverett (b. 1944), Professor of Chemistry at the University of Western Sydney, in recognition of his contributions to research and teaching in chemistry and chemical geology.
The Co analogue of herbertsmithite and gillardite.


Classification of LeverettiteHide

Approved

Physical Properties of LeverettiteHide

Vitreous
Transparency:
Transparent
Colour:
Medium to deep green
Streak:
Light green
Hardness:
Comment:
~3
Tenacity:
Brittle
Cleavage:
Perfect
on {101}
Fracture:
Conchoidal
Density:
3.64 g/cm3 (Measured)    3.709 g/cm3 (Calculated)

Optical Data of LeverettiteHide

Type:
Uniaxial (-)
Comments:
O (bluish green) > E (slightly yellowish green)
Comments:
The indices of refraction, ω and ε, are >1.8

Chemical Properties of LeverettiteHide

Formula:
Cu3Co(OH)6Cl2
IMA Formula:
Cu3CoCl2(OH)6

Crystallography of LeverettiteHide

Crystal System:
Trigonal
Class (H-M):
3 - Rhombohedral
Space Group:
R3
Cell Parameters:
a = 6.8436(6) Å, c = 14.0637(10) Å
Ratio:
a:c = 1 : 2.055
Unit Cell V:
570.43 ų (Calculated from Unit Cell)
Z:
3
Morphology:
Steep rhombohedra to 1 mm with {101} prominent and modified by {001}. The crystals can also form finger-like, parallel stacked growths along the c axis.
Twinning:
V-shaped twins by reflection on {102}

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
5.469(90)
4.701(18)
2.905(22)
2.766(100)
2.269(66)
1.822(26)
1.711(33)
1.383(23)
Comments:
From Type Description.

Type Occurrence of LeverettiteHide

General Appearance of Type Material:
Steep rhombohedra, no larger than 1 mm in size. These rhombohedra are sometimes stacked along the c axis in fingerlike, parallel growths or form V-shaped twins.
Place of Conservation of Type Material:
Type material is deposited in the collections of the Natural History Museum of Los Angeles County, Los Angeles, California, USA, catalogue numbers 64031, 64032, 64033 and 64034
Geological Setting of Type Material:
a supergene alteration phase
Associated Minerals at Type Locality:

Synonyms of LeverettiteHide

Relationship of Leverettite to other SpeciesHide

Member of:
Other Members of this group:
AtacamiteCu2(OH)3ClOrth. mmm (2/m 2/m 2/m) : Pnma
BotallackiteCu2(OH)3ClMon. 2/m : P21/m
ClinoatacamiteCu2(OH)3ClMon. 2/m
GillarditeCu3Ni(OH)6Cl2Trig. 3m (3 2/m) : R3m
HaydeeiteCu3Mg(OH)6Cl2Trig. 3m (3 2/m) : P3m1
HerbertsmithiteCu3Zn(OH)6Cl2Trig. 3m (3 2/m) : R3m
HibbingiteFe2+2(OH)3ClOrth.
IyoiteMnCuCl(OH)3Mon. 2/m : P21/m
KapellasiteCu3Zn(OH)6Cl2Trig. 3m (3 2/m) : P3m1
KempiteMn2+2(OH)3ClOrth. mmm (2/m 2/m 2/m) : Pnma
MisakiiteCu3Mn(OH)6Cl2Trig. 3m (3 2/m) : P3m1
ParatacamiteCu3(Cu,Zn)(OH)6Cl2Trig. 3m (3 2/m)
Paratacamite-(Mg)Cu3(Mg,Cu)(OH)6Cl2Trig. 3 : R3
Paratacamite-(Ni)Cu3(Ni,Cu)(OH)6Cl2Trig. 3 : R3
TondiiteCu3Mg(OH)6Cl2Trig. 3m (3 2/m) : R3m
Unnamed (Cu-Zn Chloride Hydroxide)CuZnCl(OH)3Mon. 2/m : P21/m

Other InformationHide

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

References for LeverettiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Li, Y.S., Zhang, Q.M. (2013): Structure and magnetism of S = 1/2 kagome antiferromagnets NiCu3(OH)6Cl2 and CoCu3(OH)6Cl2. J. Phys. Condens. Matter. 25, 026003.
Kampf, A.R., Sciberras, M.J., Williams, P.A. and Dini, M. (2013) Leverettite, IMA 2013-011. CNMNC Newsletter No. 16, 2013, page 2703; Mineralogical Magazine, 77, 2695-2709.
Kampf, A.R., Sciberras, M.J., Williams, P.A., Dini, M. & Molina Donoso, A.A. (2013): Leverettite from the Torrecillas mine, Iquique Provence, Chile: the Co-analogue of herbertsmithite. Mineralogical Magazine 77, 3047-3054.

Internet Links for LeverettiteHide

Localities for LeverettiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Chile (TL)
 
  • Tarapacá Region
    • El Tamarugal Province
      • Salar Grande
Kampf, A.R., Sciberras, M.J., Williams, P.A. and Dini, M. (2013) Leverettite, IMA 2013-011. CNMNC Newsletter No. 16, 2013, page 2703; Mineralogical Magazine, 77, 2695-2709; Kampf, A.R., Sciberras, M.J., Williams, P.A., Dini, M. & Molina Donoso, A.A. (2013): Leverettite from the Torrecillas mine, Iquique Provence, Chile: the Co-analogue of herbertsmithite. Mineralogical Magazine 77, 3047-3054.
Mineral and/or Locality  
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