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Widgiemoolthalite

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About WidgiemoolthaliteHide

Formula:
Ni5(CO3)4(OH)2 · 5H2O
Colour:
Green, bluish-green
Lustre:
Silky
Hardness:
Crystal System:
Monoclinic
Name:
Named by E.H. Nickel, B.W. Robinson and W.G. Mumme in 1993 after its discovery locality, the 132 North Mine, near Widgiemooltha, Western Australia, Australia.

Classification of WidgiemoolthaliteHide

Approved
Approval Year:
1992
5.DA.05

5 : CARBONATES (NITRATES)
D : Carbonates with additional anions, with H2O
A : With medium-sized cations
16b.7.1.2

16b : HYDRATED CARBONATES CONTAINING HYDROXYL OR HALOGEN
7 : Miscellaneous

Physical Properties of WidgiemoolthaliteHide

Silky
Transparency:
Transparent
Colour:
Green, bluish-green
Streak:
Light green-blue
Hardness:
3½ on Mohs scale

Optical Data of WidgiemoolthaliteHide

Type:
Biaxial (+)
RI values:
nα = 1.630 nγ = 1.640
Max Birefringence:
δ = 0.010
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
relatively strong

Chemical Properties of WidgiemoolthaliteHide

Formula:
Ni5(CO3)4(OH)2 · 5H2O
IMA Formula:
Ni5(CO3)4(OH)2 · 4-5H2O

Crystallography of WidgiemoolthaliteHide

Crystal System:
Monoclinic
Cell Parameters:
a = 10.06 Å, b = 8.75 Å, c = 8.32 Å
β = 114.38°
Ratio:
a:b:c = 1.15 : 1 : 0.951
Unit Cell V:
667.06 ų (Calculated from Unit Cell)

Type Occurrence of WidgiemoolthaliteHide

Synonyms of WidgiemoolthaliteHide

Other Language Names for WidgiemoolthaliteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Gaspéite6 photos of Widgiemoolthalite associated with Gaspéite on mindat.org.
Kambaldaite5 photos of Widgiemoolthalite associated with Kambaldaite on mindat.org.
Otwayite1 photo of Widgiemoolthalite associated with Otwayite on mindat.org.
Gillardite1 photo of Widgiemoolthalite associated with Gillardite on mindat.org.
Magnesite1 photo of Widgiemoolthalite associated with Magnesite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

5.DA.AlexkhomyakoviteK6(Ca2Na)(CO3)5Cl·6H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mcm
5.DA.05DypingiteMg5(CO3)4(OH)2 · 5H2OMon.
5.DA.05GiorgiositeMg5(CO3)4(OH)2 · 5-6H2O
5.DA.05HydromagnesiteMg5(CO3)4(OH)2 · 4H2OMon.
5.DA.05UM1986-10-CO:ClHMgMnZn (also called Mineral F, Dunn, 1995)Mg5(Zn,Mn)3(CO3)2(OH,Cl)12 · H2O
5.DA.05UM1987-01-CO:HMgSMg4(CO3)2(OH)4 · 6H2O ?Mon.
5.DA.10ArtiniteMg2(CO3)(OH)2 · 3H2OMon.
5.DA.10IndigiriteMg2Al2(CO3)4(OH)2 · 15H2O
5.DA.10ChlorartiniteMg2(CO3)(OH)Cl · 2H2OTrig. 3m : R3c
5.DA.15OtwayiteNi2(CO3)(OH)2 · H2OOrth.
5.DA.15ZaratiteNi3(CO3)(OH)4 · 4H2O ?Iso.
5.DA.20KambaldaiteNaNi4(CO3)3(OH)3 · 3H2OHex.
5.DA.25CallaghaniteCu2Mg2(CO3)(OH)6 · 2H2OMon.
5.DA.30Claraite(Cu,Zn)15(CO3)4(AsO4)2(SO4)(OH)14·7H2OTric.
5.DA.35HydroscarbroiteAl14(CO3)3(OH)36 · nH2OTric.
5.DA.35ScarbroiteAl5(CO3)(OH)13 · 5H2OHex.
5.DA.40CaresiteFe2+4Al2(OH)12[CO3] · 3H2OTrig.
5.DA.40QuintiniteMg4Al2(OH)12[CO3] · 3H2OHex. 6 2 2 : P63 2 2
5.DA.40CharmariteMn2+4Al2(OH)12[CO3] · 3H2O
5.DA.45Stichtite-2HMg6(Cr,Al)2(CO3)(OH)16 · 4H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
5.DA.45BrugnatelliteMg6Fe3+(CO3)(OH)13 · 4H2OHex.
5.DA.45ChlormagaluminiteMg4Al2(OH)12Cl2 · 3H2OHex.
5.DA.45Hydrotalcite-2HMg6Al2(CO3)(OH)16 · 4H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
5.DA.45Pyroaurite-2HMg6Fe3+2(OH)16(CO3) · 4H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
5.DA.45ZaccagnaiteZn4Al2(OH)12[CO3] · 3H2OHex.
5.DA.50ComblainiteNi4Co2(OH)12[CO3] · 3H2OTrig.
5.DA.50DesautelsiteMg6Mn3+2(OH)16[CO3] · 4H2OTrig. 3m (3 2/m)
5.DA.50HydrotalciteMg6Al2(OH)16[CO3] · 4H2OTrig. 3m (3 2/m) : R3m
5.DA.50PyroauriteMg6Fe3+2(OH)16[CO3] · 4H2OTrig. 3m (3 2/m) : R3m
5.DA.50ReevesiteNi6Fe3+2(OH)16(CO3) · 4H2OTrig.
5.DA.50StichtiteMg6Cr3+2(OH)16[CO3] · 4H2OTrig. 3m (3 2/m) : R3m
5.DA.50TakoviteNi6Al2(OH)16[CO3] · 4H2OTrig.
5.DA.50UM1998-10-CO:CoHNiCo6Fe2(CO3)(OH)16 · 4H2O ?
5.DA.55CoalingiteMg10Fe3+2(OH)24[CO3] · 2H2OTrig.

Related Minerals - Dana Grouping (8th Ed.)Hide

16b.7.1.1HydromagnesiteMg5(CO3)4(OH)2 · 4H2OMon.

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 WidgiemoolthaliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Nickel, E.H., Robinson, B.W., Mumme, W.G. (1993) Widgiemoolthalite: the new Ni analogue of hydromagnesite from Western Australia. American Mineralogist: 78: 819-821.
Mandarino, J.A. (1997) New Minerals 1990-1994. Mineralogical Record, Inc., Tucson, AZ: 231 pages.

Internet Links for WidgiemoolthaliteHide

Localities for WidgiemoolthaliteHide

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.
Australia (TL)
 
  • Western Australia
    • Coolgardie Shire
      • Widgiemooltha
[MinRec 25:289,90]; Am.Min.: 78 (1993): 819-21.; Nickel E H, Robinson B W, Mumme W G (1993) Widgiemoolthalite: the new Ni analogue of hydromagnesite from Western Australia. American Mineralogist 78, 819-821
Mineral and/or Locality  
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