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NiMn34+O7 · 3H2O
Black, red-brown cast.
Named in 1994 by Joel D. Grice, Blair Gartrell, Robert A. Gault and Jerry van Velthuizen in honor of Ernest (Ernie) Henry Nickel (31 August 1925, Louth, Ontario, Canada - 18 July 2009), Canadian-Australian mineralogist, Canada Centre for Mineral and Energy Technology (CANMET), Ottawa (1953-1971), Division of Mineralogy, CSIRO, Wembley, Western Australia (1971-1985), for his outstanding contributions to research on the mineralogy and genesis of economic mineral deposits in Canada and Australia, and to his dedication to the formalization of mineral systematics. His work included the Nickel–Strunz mineral classification system.
Isostructural with:
This page provides mineralogical data about Ernienickelite.

Classification of Ernienickelite


4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
L : Hydroxides with H2O +- (OH); sheets of edge-sharing octahedra

8 : AB3X7

Physical Properties of Ernienickelite

Diaphaneity (Transparency):
Black, red-brown cast.
Hardness (Mohs):
Hardness Data:
3.84 g/cm3 (Measured)    3.83 g/cm3 (Calculated)

Optical Data of Ernienickelite

Uniaxial (-)
RI values:
nω = 2.000 nε = 1.970
Max Birefringence:
δ = 0.030
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Very High

Chemical Properties of Ernienickelite

IMA Formula:
NiMn34+O7 · 3H2O
Elements listed in formula:
Common Impurities:

Crystallography of Ernienickelite

Crystal System:
Class (H-M):
3 - Pyramidal
Space Group:
Cell Parameters:
a = 7.5142(2) Å, c = 20.52(2) Å
a:c = 1 : 2.731
Unit Cell Volume:
V 1,003.40 ų (Calculated from Unit Cell)
platy crystals, hexagonal to nearly circular
on {-12-10}
X-Ray Powder Diffraction Data:
6.84 (100)
2.219 (30)
4.01 (20)
1.884 (20)
1.575 (20)
3.44 (10)
2.748 (10)

Type Occurrence of Ernienickelite

Place of Conservation of Type Material:
Canadian Museum of Nature, cat. no. CMN#81510

Relationship of Ernienickelite to other Species

4.FL.TrébeurdeniteFe22+Fe43+O2(OH)10(CO3) · 3H2O
4.FL.05WoodalliteMg6Cr2(OH)16Cl2 · 4H2O
4.FL.05IowaiteMg6Fe23+(OH)16Cl2 · 4H2O
4.FL.05JamboriteNi2+1-xCox3+(OH)2-x(SO4)x · nH2O where [x≤1/3; n≤(1-x)]
4.FL.05MeixneriteMg6Al2(OH)18 · 4H2O
4.FL.05MuskoxiteMg7Fe43+(OH)26 · H2O
4.FL.05FougèriteFe42+Fe23+(OH)12(CO3) · 3H2O
4.FL.10HydrocalumiteCa4Al2(OH)12(Cl,CO3,OH)2 · 4H2O
4.FL.15KuzeliteCa4Al2(OH)12(SO4) · 6H2O
4.FL.20Aurorite(Mn2+,Ag,Ca)Mn34+O7 · 3H2O
4.FL.20ChalcophaniteZnMn34+O7 · 3H2O
4.FL.20JianshuiiteMgMn34+O7 · 3H2O
4.FL.25WoodruffiteZn2Mn54+O12 · 4H2O
4.FL.30AsbolaneMn4+(O,OH)2 · (Co,Ni,Mg,Ca)x(OH)2x · nH2O
4.FL.35BuseriteNa4Mn14O27 · 21H2O
4.FL.40Ranciéite(Ca,Mn2+)0.2(Mn4+,Mn3+)O2 · 0.6H2O
4.FL.40Takanelite(Mn2+,Ca)2xMn4+1-xO2 · 0.7H2O
4.FL.45Birnessite(Na,Ca,K)0.6(Mn4+,Mn3+)2O4 · 1.5H2O
4.FL.55CianciulliiteMg2Mn2+Zn2(OH)10 · 2-4H2O
4.FL.60JenseniteCu32+Te6+O6 · 2H2O
4.FL.65LeisingiteCuMg2Te6+O6 · 6H2O
4.FL.70Akdalaite(Al2O3)5 · H2O
4.FL.75CafetiteCaTi2O5 · H2O
4.FL.80MouriteUO2Mo56+O16 · 5H2O

Other Names for Ernienickelite

Name in Other Languages:

Other Information

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 Ernienickelite

Reference List:
Gorshkov, A.I., Kapustkin, G.R., Sivtsov, A.V., Lazarenko, I.M., Subrovinskiy, L.S. (1992) Ni-chalcophanite: a new variety of the mineral from a weathering crust on ultramafic rocks of the Kempirsay massif (southern Urals). Izvestiya Akademii Nauk Seriya Geologicheskaya: 11: 108-117. (in Russian)

Jambor, J.L, Grew, E.S. (1994) New mineral names. American Mineralogist: 79: 387-391. (abstract of Gorshkov et al. 1992)

Grice, J.D. Gartrell, B., Gault, R.A. Van Velthuizen, J. (1994) Ernienickelite, NiMn3O7·3H2O, a new mineral species from the Siberia complex, Western Australia: comments on the crystallography of the calcophanite group. Canadian Mineralogist: 32: 333-337.

Internet Links for Ernienickelite URL:
Please feel free to link to this page.

Localities for Ernienickelite

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 for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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 (TL)
  • Western Australia
    • Kalgoorlie-Boulder Shire
      • Siberia Goldfield (Waverley)
GRICE, J.D. GARTRELL, B., GAULT, R.A. & VAN VELTHUIZEN, J. (1994): Ernienickelite, NiMn3O73H2O, a new mineral species from the Siberia complex, Western Australia: comments on the crystallography of the chalcophanite group. Canadian Mineralogist 32, 333-337.
  • East Region
    • Lomié
Lambert, R.J., and Noble, A.C. (2008): Nkamouna Cobalt Project Feasibility Study. Pincock, Allen & Holt NI 43-101 Technical Report for Geovic Mining Corp.
  • Aktobe Province (Aqtöbe Oblysy; Aktubinskaya Oblast')
    • Urals
      • Kempirsai Cr deposit
  • Lower Silesia (Dolnośląskie)
    • Ząbkowice District
      • Ząbkowice (Frankenstein)
        • Szklary (Gläsendorf)
Pieczka, A., Włodek, A., Gołębiowska, B., Szełęg, E., Szuszkiewicz, A., Ilnicki, S., Nejbert, K., Turniak, K. (2015): Phosphate-bearing pegmatites in the Góry Sowie Block and adjacent areas, Sudetes, SW Poland. 7th International Symposium on Granitic Pegmatites, PEG 2015 Książ, Poland. Abstracts: 77-78
  • Thiès Region
    • Tivaouane
Gunnar Farber specimens, 2007; Hühne, H. (2009): Traubiger Apatit und Ernienickelit aus den Phosphatminen Senegals. Lapis 34, 24.
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