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Wermlandite Group

A group of related mineral species
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06119320017271929612064.jpg
Nikischerite

Huanuni mine, Huanuni, Pantaleón Dalence Province, Oruro, Bolivia
07577420017271951638866.jpg
Shigaite, etc.

N'Chwaning I Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
09195090017271951649864.jpg
Shigaite

N'Chwaning I Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
06119320017271929612064.jpg
Nikischerite

Huanuni mine, Huanuni, Pantaleón Dalence Province, Oruro, Bolivia
07577420017271951638866.jpg
Shigaite, etc.

N'Chwaning I Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
09195090017271951649864.jpg
Shigaite

N'Chwaning I Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
06119320017271929612064.jpg
Nikischerite

Huanuni mine, Huanuni, Pantaleón Dalence Province, Oruro, Bolivia
05455180017271951658607.jpg
Shigaite, etc.

N'Chwaning I Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
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About Wermlandite GroupHide

Formula:
M7R3+2(OH)18[Ca(H2O)6][SO4]2 · 6H2O, where = Mg, Fe, Zn and R= Al or Fe
This page provides mineralogical data about Wermlandite Group.


Unique IdentifiersHide

Mindat ID:
43295
Long-form identifier:
mindat:1:1:43295:9

Chemistry of Wermlandite GroupHide

Mindat Formula:
M7R3+2(OH)18[Ca(H2O)6][SO4]2 · 6H2O, where = Mg, Fe, Zn and R= Al or Fe

Chemical AnalysisHide

Oxide wt%:
 12
Na2O1.6 %
MgO16 %28.67 %
Al2O320 %0.23 %
SO315 %14.80 %
CaO2.76 %
Rest48 %
Cr2O30.23 %
Fe2O316.00 %
SiO20.48 %
H2O35.58 %
Total:100.6 %98.75 %
Empirical formulas:
Sample IDEmpirical Formula
2H41.48Ca0.52Mg7.47Fe3+2.11Al0.05Cr0.03S1.94Si0.08O38
Sample references:
IDLocalityReferenceNotes
1Motukoreaite occurrence, Hoyo Azul, Playa Blanca, Yaiza, Lanzarote, Las Palmas Province, Canary Islands, Spain
Dillen, Rik, Van Opstal, Simon, Mestrom, Paul (2021) Een nieuwigheid voor Lanzarote: motukoreaiet. Geonieuws: 46(4): 93-96 (in Dutch).
average of 2 semiquantitative point analyses performed by Joy Desor.
2Långban Mine, Långban Ore District, Filipstad, Värmland County, Sweden
Zhitova, Elena S., Chukanov, Nikita V., Jonsson, Erik, Pekov, Igor V., Belakovskiy, Dmitry I., Vigasina, Marina F., Zubkova, Natalia V., Van, Konstantin V., Britvin, Sergey N. (2021) Erssonite, CaMg7Fe3+2(OH)18(SO4)2⋅12H2O, a new hydrotalcite-supergroup mineral from Långban, Sweden. Mineralogical Magazine, 85 (5) 817-826 doi:10.1180/mgm.2021.70
Electron microprobe (H2O content is calculated from structure data); The empirical formula based on 38 O atoms.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0014801MotukoreaiteRius J, Plana F (1986) Contribution to the superstructure resolution of the double layer mineral motukoreaite Neues Jahrbuch fur Mineralogie, Monatshefte 1986 263-2721986the Emile Baudot bank, western Mediterranean0293
0005480ShigaiteCooper M A, Hawthorne F C (1996) The crystal structure of shigaite, [AlMn2(OH)6]3(SO4)2Na(H2O)6{H2O}6, a hydrotalcite-group mineral The Canadian Mineralogist 34 91-9719960293
0010871WermlanditeRius J, Allmann R (1984) The superstructure of the double layer mineral wermlandite [Mg7(Al0.57,Fe3+0.43)2(OH)18]2+[(Ca0.6,Mg0.4)(SO4)2(H2O)12]2- Zeitschrift fur Kristallographie 168 133-1441984Langban, Warmland, Sweden0293
0005826NikischeriteHuminicki D M C, Hawthorne F C (2003) The crystal structure of nikischerite, NaFeAl3(SO4)2(OH)18(H2O)12, a mineral of the shigaite group The Canadian Mineralogist 41 79-8220030293
CIF Raw Data - click here to close

Relationship of Wermlandite Group to other SpeciesHide

Member of:
Hydrotalcite Supergroup
Other Members of Hydrotalcite Supergroup:
Akopovaite Al4Li2(OH)12(CO3)(H2O)3Mon. 2/m : B2/m
AmoraiteCa12Al6(OH)36(CO3)2(SO3) · 15H2O Tric. 1 : P1
BrugnatelliteMg6Fe3+(CO3)(OH)13 · 4H2OHex.
CarbocalumiteCa4Al2(OH)12(CO3) · 6H2OTrig. 3m (3 2/m) : R3c
CoalingiteMg10Fe3+2(OH)24[CO3] · 2H2OTrig. 3m (3 2/m) : R3m
Cualstibite GroupM2R(OH)6[Sb5+(OH)6], where M = Zn, Ni, Cu and R = Al or Fe3+
DritsiteLi2Al4(OH)12Cl2 · 3H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mcm
Fougèrite Group
Glaucocerinite Group
Hydrocalumite Group
Hydrotalcite GroupM6R3+2(OH)16Z · 4H2O, where M=Mg, Fe, Ni, R3+ = Al, Cr, Co or Fe, and Z=CO3, Cl
MampsisiteCa4Al2(CO3)(OH)12 · 5H2OTric. 1 : P1
Marioantofilliite[Cu4Al2(OH)12](CO3) · 3H2OMon. 2/m : B2/m
MuskoxiteMg7Fe4O13 · 10H2OTrig. 3m (3 2/m)
PoellmanniteCa6Al3(OH)18[Na(H2O)6](SO4)2 · 6H2OTrig. 3 : R3
Quintinite Group
RotemiteCa4Cr2(OH)12Cl2 · 4H2OTrig. 3m (3 2/m) : R3c
UM1987-05-OH:AlCMgMg4Al2(OH)12(CO3,SO4) · 3H2O
Woodwardite GroupMay be considered a subgroup of the Hydrotalcite Group.
Wermlandite Group Members:
Erssonite Mg7Fe3+2(OH)18[Ca(H2O)6](SO4)2 · 12H2OTrig. 3m (3 2/m) : P3c1
Karchevskyite Mg18Al9(OH)54Sr2(CO3)9(H2O)6(H3O)5Trig.
Motukoreaite Mg6Al3(OH)18[Na(H2O)6][SO4]2 · 6H2OTrig. 3m (3 2/m) : R3m
Natroglaucocerinite Zn6Al3(OH)18[Na(H2O)6](SO4)2 · 6H2OHex.
Nikischerite Fe2+6Al3(OH)18[Na(H2O)6](SO4)2 · 6H2OTrig. 3 : R3
Shigaite Mn6Al3(OH)18[Na(H2O)6](SO4)2 · 6H2OTrig. 3 : R3
Wermlandite Mg7Al2(OH)18[Ca(H2O)6][SO4]2 · 6H2OTrig. 3m (3 2/m) : P3c1

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.

Internet Links for Wermlandite GroupHide

References for Wermlandite GroupHide

Localities for Wermlandite GroupHide

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 references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Australia
 
  • South Australia
    • Pastoral Unincorporated Area
      • Iron Knob
[Shigaite] Pring et al. (1992) +1 other reference
  • Western Australia
    • Coolgardie Shire
      • Widgiemooltha
[Motukoreaite] Clissold (2007)
Austria
 
  • Styria
    • Südoststeiermark District
      • Bad Gleichenberg
        • Wilhelmsdorf
[Motukoreaite] Alker et al. (1981) +3 other references
Bolivia
 
  • Oruro
    • Pantaleón Dalence Province
      • Huanuni
[Nikischerite] Roberts et al. (2003) +1 other reference
Canada
 
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
[Shigaite] HORVÁTH et al. (2000)
Greece
 
  • Attica
    • East Attica
      • Lavreotiki
        • Agios Konstantinos (Kamariza)
          • Kamariza Mines (Kamareza Mines)
[Natroglaucocerinite] American Mineralogist
[Natroglaucocerinite]
Italy
 
  • Veneto
    • Vicenza Province
      • Crespadoro
        • Chiampo Valley
[Motukoreaite] Daleffe et al. (2008)
Japan
 
  • Shiga Prefecture
    • Kusatsu City
[Shigaite] Peacor et al. (1985)
New Zealand
 
  • Auckland Region
[Motukoreaite] Rodgers et al. (1977)
Poland
 
  • Greater Poland Voivodeship
    • Koło County
      • Gmina Kłodawa
[Motukoreaite] Wachowiak et al. (2016)
  • Silesian Voivodeship
    • Wodzisław County
      • Wodzisław Śląski
[Shigaite] Ł. Kruszewski (PXRD data)
Russia
 
  • Murmansk Oblast
    • Kovdorsky District
      • Kovdor Massif
[Karchevskyite] Britvin et al. (2008)
South Africa
 
  • Northern Cape
    • John Taolo Gaetsewe District Municipality
      • Joe Morolong Local Municipality
[Shigaite] Cairncross et al. (1995) +3 other references
[Shigaite] Cairncross et al. (1995) +4 other references
[Shigaite] Gutzmer (1996)
[Shigaite] Cairncross (2000)
Spain
 
  • Andalusia
    • Almería
      • Cuevas del Almanzora
        • Sierra Almagrera
[Natroglaucocerinite] Calvo Rebollar et al. (2022)
  • Canary Islands
    • Las Palmas Province
      • Lanzarote
        • Yaiza
          • Playa Blanca
            • Hoyo Azul
[Motukoreaite] Van Opstal (2021) +2 other references
Sweden
 
  • Värmland County
    • Filipstad
      • Långban Ore District
[Wermlandite] Moore (1971) +2 other references
      • Persberg ore district
[Wermlandite] Linden (2002)
[Wermlandite] Östra Värmlands Mineral Society
USA
 
  • Michigan
    • Iron County
      • Iron River
        • Mineral Hills
[Shigaite] Heinrich et al. (2004)
[Shigaite] Shawn Carlson (2010)
        • Stambaugh
[Shigaite] A. E. Seaman Mineral Museum collection.
[Shigaite] A. E. Seaman Mineral Museum collection.
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