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Shigaite

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Formula:
Mn6Al3(OH)18[Na(H2O)6][SO4]2 · 6H2O
Colour:
Deep yellow with black, inhomogenous inclusions
Lustre:
Vitreous, Dull
Crystal System:
Trigonal
Name:
Named after its discovery locality.
The Mn analogue of nikischerite.



Classification of Shigaite

Approved
7.DD.35

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
D : With only medium-sized cations; sheets of edge-sharing octahedra
31.1.2.1

31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
1 : (AB)m(XO4)pZq·xH2O, where m:p > 6:1
25.9.8

25 : Sulphates
9 : Sulphates of Mn

Physical Properties of Shigaite

Vitreous, Dull
Transparency:
Transparent
Colour:
Deep yellow with black, inhomogenous inclusions

Optical Data of Shigaite

Type:
Uniaxial (-)

Chemical Properties of Shigaite

Formula:
Mn6Al3(OH)18[Na(H2O)6][SO4]2 · 6H2O
IMA Formula:
NaAl3Mn2+6(SO4)2(OH)18 · 12H2O

Crystallography of Shigaite

Crystal System:
Trigonal
Cell Parameters:
a = 9.51 Å, c = 32.83 Å
Ratio:
a:c = 1 : 3.452
Unit Cell V:
2,571.36 ų (Calculated from Unit Cell)

Type Occurrence of Shigaite

Synonyms of Shigaite

Other Language Names for Shigaite

Relationship of Shigaite to other Species

Other Members of this group:
KarchevskyiteMg18Al9(OH)54Sr2(CO3)9(H2O)6 (H3O)5
MotukoreaiteMg6Al3(OH)18[Na(H2O)6][SO4]2 · 6H2O
NatroglaucoceriniteZn6Al3(OH)18[Na(H2O)6](SO4)2•6H2O
NikischeriteFe2+6Al3(OH)18[Na(H2O)6][SO4]2 · 6H2O
WermlanditeMg7Al2(OH)18[Ca(H2O)6][SO4]2 · 6H2O

Common Associates

Associated Minerals Based on Photo Data:
Rhodochrosite113 photos of Shigaite associated with Rhodochrosite on mindat.org.
Gageite7 photos of Shigaite associated with Gageite on mindat.org.
Hematite7 photos of Shigaite associated with Hematite on mindat.org.
Seamanite5 photos of Shigaite associated with Seamanite on mindat.org.
Hausmannite5 photos of Shigaite associated with Hausmannite on mindat.org.
Caryopilite5 photos of Shigaite associated with Caryopilite on mindat.org.
Calcite5 photos of Shigaite associated with Calcite on mindat.org.
Baryte4 photos of Shigaite associated with Baryte on mindat.org.
Gonyerite3 photos of Shigaite associated with Gonyerite on mindat.org.
Andradite3 photos of Shigaite associated with Andradite on mindat.org.

Related Minerals - Nickel-Strunz Grouping

7.DD.05FelsőbányaiteAl4(SO4)(OH)10 · 4H2O
7.DD.10LangiteCu4(SO4)(OH)6 · 2H2O
7.DD.10PosnjakiteCu4(SO4)(OH)6 · H2O
7.DD.10WroewolfeiteCu4(SO4)(OH)6 · 2H2O
7.DD.15SpangoliteCu6Al(SO4)(OH)12Cl · 3H2O
7.DD.20KtenasiteZn(Cu,Zn)4(SO4)2(OH)6 · 6H2O
7.DD.25ChristeliteCu2Zn3(SO4)2(OH)6 · 4H2O
7.DD.30CampigliaiteMn2+Cu4(SO4)2(OH)6 · 4H2O
7.DD.30DevillineCaCu4(SO4)2(OH)6 · 3H2O
7.DD.30OrthoserpieriteCa(Cu,Zn)4(SO4)2(OH)6 · 3H2O
7.DD.30SerpieriteCa(Cu,Zn)4(SO4)2(OH)6 · 3H2O
7.DD.30NiedermayriteCdCu4(SO4)2(OH)6 · 4H2O
7.DD.30EdwardsiteCu3Cd2(SO4)2(OH)6·4H2O
7.DD.35Carrboydite[(Ni1-xAlx)(OH)2][SO4]x/2 · nH2O
7.DD.35Glaucocerinite(Zn1-xAlx)(OH)2(SO4)x/2 · nH2O
7.DD.35Honessite(Ni1-xFe3+x)(OH)2[SO4]x/2 · nH2O
7.DD.35Hydrohonessite(Ni1-xFe3+x)(OH)2[SO4]x/2 · nH2O
7.DD.35MotukoreaiteMg6Al3(OH)18[Na(H2O)6][SO4]2 · 6H2O
7.DD.35Mountkeithite[(Mg1-xFe3+x)(OH)2][SO4]x/2 · nH2O
7.DD.35WermlanditeMg7Al2(OH)18[Ca(H2O)6][SO4]2 · 6H2O
7.DD.35WoodwarditeCu1-xAlx(OH)2[SO4]x/2 · nH2O
7.DD.35ZincaluminiteZn6Al6(SO4)2(OH)16 · 5H2O
7.DD.35Hydrowoodwardite(Cu1-xAlx)(OH)2[SO4]x/2 · nH2O
7.DD.35ZincowoodwarditeZn1-xAlx(OH)2[SO4]x/2 · nH2O
7.DD.35NatroglaucoceriniteZn6Al3(OH)18[Na(H2O)6](SO4)2•6H2O
7.DD.35NikischeriteFe2+6Al3(OH)18[Na(H2O)6][SO4]2 · 6H2O
7.DD.40Lawsonbauerite(Mn2+,Mg)9Zn4(SO4)2(OH)22 · 8H2O
7.DD.40Torreyite(Mg,Mn2+)72Mn2+2Zn4(SO4)2(OH)22 · 8H2O
7.DD.45MooreiteMg92Mn2Zn4(SO4)2(OH)26 · 8H2O
7.DD.50NamuwiteZn4(SO4)(OH)6 · 4H2O
7.DD.55BechereriteZn7Cu(OH)13[(SiO(OH)3(SO4)]
7.DD.60Ramsbeckite(Cu,Zn)15(SO4)4(OH)22 · 6H2O
7.DD.65VonbezingiteCa6Cu3(SO4)3(OH)12 · 2H2O
7.DD.70RedgilliteCu6(SO4)(OH)10 · H2O
7.DD.75ChalcoalumiteCuAl4(SO4)(OH)12 · 3H2O
7.DD.75Nickelalumite(Ni,Cu)Al4(SO4,(NO3)2)(OH)12 · 3H2O
7.DD.75KyrgyzstaniteZnAl4(SO4)(OH)12·3H2O
7.DD.80GuarinoiteZn6(SO4)(OH)10 · 5H2O
7.DD.80Schulenbergite(Cu,Zn)7(SO4)2(OH)10 · 3H2O
7.DD.80ThérèsemagnaniteNaCo4(SO4)(OH)6Cl·6H2O
7.DD.80UM1992-30-SO:CCuHZn(Zn,Cu)7(SO4,CO3)2(OH)10 · 3H2O
7.DD.85MontetrisaiteCu6(SO4)(OH)10 · 2H2O

Related Minerals - Hey's Chemical Index of Minerals Grouping

25.9.1SzmikiteMnSO4 · H2O
25.9.2JôkokuiteMnSO4 · 5H2O
25.9.3MallarditeMnSO4 · 7H2O
25.9.4ManganolangbeiniteK2Mn2(SO4)3
25.9.5Chvaleticeite(Mn,Mg)SO4 · 6H2O
25.9.6DespujolsiteCa3Mn4+(SO4)2(OH)6 · 3H2O
25.9.7ApjohniteMn2+Al2(SO4)4 · 22H2O
25.9.9Ilesite(Mn,Zn,Fe)SO4 · 4H2O
25.9.10MooreiteMg92Mn2Zn4(SO4)2(OH)26 · 8H2O
25.9.11Torreyite(Mg,Mn2+)72Mn2+2Zn4(SO4)2(OH)22 · 8H2O
25.9.12Lawsonbauerite(Mn2+,Mg)9Zn4(SO4)2(OH)22 · 8H2O
25.9.13Dietrichite(Zn,Fe2+,Mn2+)Al2(SO4)4 · 22H2O

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 Shigaite

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
PEACOR, D.R., DUNN, P.J., KATO, A. & WICKS, F.J. (1985): Shigaite, a new manganese aluminum sulfate mineral from the Ioi Mine, Shiga, Japan. Neues Jahrbuch für Mineralogie, Monatshefte Jg. 1985(10), 453-457. Abstracted in: American Mineralogist (1986): 71: 1546.
PRING, A., SLADE, P.G. & BIRCH, W.D. (1992): Shigaite from Iron Monarch, South Australia. Mineralogical Magazine 56, 417-419.
COOPER, M.A. & HAWTHORNE, F.C. (1996): The crystal structure of shigaite, [AlMn22+(OH)6]3(SO4)2Na(H2O)6(H2O)6, a hydrotalcite group mineral. Canadian Mineralogist 34, 91-97.
Mills, S.J., Christy, A.G., Genin, J.-M.R., Kameda, T., Colombo, F. (2012): Nomenclature of the hydrotalcite supergroup: natural layered double hydroxides. Mineralogical Magazine, 76, 1289-1336.

Internet Links for Shigaite

mindat.org URL:
https://www.mindat.org/min-3638.html
Please feel free to link to this page.
Specimens:
The following Shigaite specimens are currently listed for sale on minfind.com.

Localities for Shigaite

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.
(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
 
  • South Australia
    • Eyre Peninsula
      • Middleback Range
        • Iron Knob
Pring, A., Francis, G. & Birch, W. D. (1992): Nissonite, namibite, and other additions to the mineral suite from Iron Monarch, South Australia. Australian Mineral. 6, 31-39. ; Pring A, Birch W D (1993) Gatehouseite, a new manganese hydroxy phosphate from Iron Monarch, South Australia. Mineralogical Magazine 57, 309-313
Canada
 
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
HORVÁTH, L., PFENNINGER HORVÁTH, E. (2000) I minerali di Mont-Saint-Hilaire (Québec, Canada) Rivista Mineralogica Italiana, XXIV, 140-202 (in Italian with English summary).
Japan (TL)
 
  • Honshu Island
    • Kinki Region
      • Shiga Prefecture
        • Ritto City
PEACOR, D.R., DUNN, P.J., KATO, A. & WICKS, F.J. (1985): Shigaite, a new manganese aluminum sulfate mineral from the Ioi Mine, Shiga, Japan. Neues Jahrbuch für Mineralogie, Monatshefte Jg. 1985(10), 453-457. Abstracted in: American Mineralogist (1986): 71: 1546.
South Africa
 
  • Northern Cape Province
    • Kalahari manganese field
      • Hotazel
Bruce Cairncross (2000) The Desmond Sacco Collection
      • Kuruman
Cairncross, B., and Dixon, R., (1995) Minerals of South Africa. The Geological Society of South Africa, Linden 2014, RSA; Gutzmer, J. (1996). Genesis and alteration of the Kalahari and Postmasburg manganese deposits, Griqualand West, South Africa (Doctoral dissertation, Rand Afrikaans University); Cairncross, B., and Beukes, N. J., (2013) The Kalahari Manganese Field, the adventure continues. Struik Nature Publishers, Cape Town, South Africa; Cairncross, B. (2016) Connoisseur's Choice: Shigaite, Kalahari Manganese Field, Northern Cape Province, South Africa, Rocks & Minerals, 91:2, 150-15
Cairncross, B., and Dixon, R., (1995) Minerals of South Africa. The Geological Society of South Africa, Linden 2014, RSA; Gutzmer, J. (1996). Genesis and alteration of the Kalahari and Postmasburg manganese deposits, Griqualand West, South Africa (Doctoral dissertation, Rand Afrikaans University); Cairncross, B. & Balayer, P. (2007): Neufund: Shigait aus den Kalahari-Manganfeldern, Südafrika. LAPIS 32 (4): 23-26 + 50; Cairncross, B., and Beukes, N. J., (2013) The Kalahari Manganese Field, the adventure continues. Struik Nature Publishers, Cape Town, South Africa; Cairncross, B. (2016) Connoisseur's Choice: Shigaite, Kalahari Manganese Field, Northern Cape Province, South Africa, Rocks & Minerals, 91:2, 150-15
Gutzmer, J. (1996). Genesis and alteration of the Kalahari and Postmasburg manganese deposits, Griqualand West, South Africa (Doctoral dissertation, Rand Afrikaans University).
USA
 
  • Michigan
    • Iron Co.
      • Menominee iron range
        • Mineral Hills
Mineralogy of Michigan (2004) Heinrich & Robinson
Shawn Carlson (2010) Mineral News, 26, #11, 1-2 & 9-10.
        • Stambaugh
A. E. Seaman Mineral Museum collection.
A. E. Seaman Mineral Museum collection.
Mineral and/or Locality  
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