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Natroalunite-2c

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Formula:
(Na,Ca0.5,K)Al3(SO4)2(OH)6
Hardness:
3 - 4
Specific Gravity:
2 (Calculated)
Crystal System:
Trigonal
Name:
Originally named minamiite for Dr. A. E. Minami (1899-1977), later renamed natroalunite-2c for the structural relation (doubled c-axis) to natroalunite.
Alunite Group.
Originally named minamiite; renamed natroalunite-2c.


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Classification of Natroalunite-2cHide

Notes:
Published without approval
Approval History:
Published without approval: 2010
7.BC.10

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
B : Sulfates (selenates, etc.) with additional anions, without H2O
C : With medium-sized and large cations
30.2.4.5

30 : ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
2 : (AB)2(XO4)Zq
25.6.19

25 : Sulphates
6 : Sulphates of Al and Tl

Physical Properties of Natroalunite-2cHide

Hardness:
3 - 4 on Mohs scale
Density:
2 g/cm3 (Calculated)

Chemical Properties of Natroalunite-2cHide

Formula:
(Na,Ca0.5,K)Al3(SO4)2(OH)6

Crystallography of Natroalunite-2cHide

Crystal System:
Trigonal
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Space Group:
R3m
Cell Parameters:
a = 6.98 Å, c = 33.49 Å
Ratio:
a:c = 1 : 4.798
Unit Cell V:
1,413.05 ų (Calculated from Unit Cell)

First Recorded Occurrence of Natroalunite-2cHide

Synonyms of Natroalunite-2cHide

Other Language Names for Natroalunite-2cHide

German:Minamiit
Spanish:Minamiita

Relationship of Natroalunite-2c to other SpeciesHide

Other Members of this group:
AluniteKAl3(SO4)2(OH)6Trig. 3m : R3m
Ammonioalunite(NH4)Al3(SO4)2(OH)6Trig.
Ammoniojarosite(NH4)Fe3+3(SO4)2(OH)6Trig. 3m : R3m
ArgentojarositeAgFe3+3(SO4)2(OH)6Trig. 3m : R3m
Beaverite-(Cu)Pb(Fe3+2Cu)(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
Beaverite-(Zn)Pb(Fe3+2Zn)(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
DorallchariteTlFe3+3(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
HuangiteCa0.5Al3(SO4)2(OH)6Trig.
Hydroniumjarosite(H3O)Fe3+3(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
JarositeKFe3+ 3(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
NatroaluniteNaAl3(SO4)2(OH)6Trig. 3m : R3m
NatrojarositeNaFe3(SO4)2(OH)6Trig. 3m : R3m
OsarizawaitePb(Al2Cu2+)(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
PlumbojarositePb0.5Fe3+3(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
Schlossmacherite(H3O)Al3(SO4)2(OH)6Trig.
WalthieriteBa0.5Al3(SO4)2(OH)6Trig.

Common AssociatesHide

Associated Minerals Based on Photo Data:
Botryogen1 photo of Natroalunite-2c associated with Botryogen on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

7.BC.Adranosite(NH4)4NaAl2(SO4)4Cl(OH)2Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
7.BC.05D'AnsiteNa21Mg(SO4)10Cl3Iso.
7.BC.10AluniteKAl3(SO4)2(OH)6Trig. 3m : R3m
7.BC.10Ammonioalunite(NH4)Al3(SO4)2(OH)6Trig.
7.BC.10Ammoniojarosite(NH4)Fe3+3(SO4)2(OH)6Trig. 3m : R3m
7.BC.10ArgentojarositeAgFe3+3(SO4)2(OH)6Trig. 3m : R3m
7.BC.10Beaverite-(Cu)Pb(Fe3+2Cu)(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
7.BC.10DorallchariteTlFe3+3(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
7.BC.10HuangiteCa0.5Al3(SO4)2(OH)6Trig.
7.BC.10Hydroniumjarosite(H3O)Fe3+3(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
7.BC.10JarositeKFe3+ 3(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
7.BC.10NatroaluniteNaAl3(SO4)2(OH)6Trig. 3m : R3m
7.BC.10NatrojarositeNaFe3(SO4)2(OH)6Trig. 3m : R3m
7.BC.10OsarizawaitePb(Al2Cu2+)(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
7.BC.10PlumbojarositePb0.5Fe3+3(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
7.BC.10Schlossmacherite(H3O)Al3(SO4)2(OH)6Trig.
7.BC.10WalthieriteBa0.5Al3(SO4)2(OH)6Trig.
7.BC.10Beaverite-(Zn)Pb(Fe3+2Zn)(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
7.BC.15Ye'elimiteCa4Al6(SO4)O12Iso.
7.BC.20AtlasoviteK(BiO)Cu6Fe3+(SO4)5O3ClTet. 4/mmm (4/m 2/m 2/m) : P4/ncc
7.BC.20NabokoiteKCu7(SO4)5(Te4+O3)OClTet.
7.BC.25ChlorothioniteK2Cu(SO4)Cl2Orth. mmm (2/m 2/m 2/m) : Pnma
7.BC.30EuchlorineKNaCu3(SO4)3OMon.
7.BC.30FedotoviteK2Cu3(SO4)3OMon. 2/m : B2/b
7.BC.35KamchatkiteKCu3(SO4)2OClOrth. mmm (2/m 2/m 2/m) : Pnma
7.BC.40PiypiteK4Cu4O2(SO4)4 · (Na,Cu)ClTet.
7.BC.45KlyuchevskiteK3Cu3(Fe3+,Al)(SO4)4O2Mon.
7.BC.45AlumoklyuchevskiteK3Cu3(Al,Fe3+)(SO4)4O2Tric. 1 : P1
7.BC.50CaledonitePb5Cu2(SO4)3(CO3)(OH)6Orth. mm2 : Pmn21
7.BC.55WherryitePb7Cu2(SO4)4(SiO4)2(OH)2Mon. 2/m : B2/m
7.BC.60MammothitePb6Cu4AlSb5+O2(OH)16Cl4(SO4)2Mon. 2 : B2
7.BC.65LinaritePbCu(SO4)(OH)2Mon. 2/m : P21/m
7.BC.65SchmiederitePb2Cu2(Se6+O4)(Se4+O3)(OH)4Mon.
7.BC.65MunakataitePb2Cu2(Se4+O3)(SO4)(OH)4Mon. 2/m : P21/m
7.BC.70ChenitePb4Cu(SO4)2(OH)6Tric. 1 : P1
7.BC.75KrivovichevitePb3Al(OH)6(SO4)(OH)Trig. 3m : R3c
7.BC.80AnhydrokainiteKMg(SO4)Cl

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

30.2.4.1AluniteKAl3(SO4)2(OH)6Trig. 3m : R3m
30.2.4.3Schlossmacherite(H3O)Al3(SO4)2(OH)6Trig.
30.2.4.4OsarizawaitePb(Al2Cu2+)(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
30.2.4.6Ammonioalunite(NH4)Al3(SO4)2(OH)6Trig.
30.2.4.7WalthieriteBa0.5Al3(SO4)2(OH)6Trig.
30.2.4.8HuangiteCa0.5Al3(SO4)2(OH)6Trig.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

25.6.1RostiteAl(SO4)(OH) · 5H2OOrth. mmm (2/m 2/m 2/m)
25.6.2JurbaniteAl(SO4)(OH) · 5H2OMon.
25.6.3KhademiteAl(SO4)F · 5H2OOrth. mmm (2/m 2/m 2/m)
25.6.4Meta-aluminiteAl2(SO4)(OH)4 · 5H2O
25.6.5AluminiteAl2(SO4)(OH)4 · 7H2OMon. 2/m : P21/b
25.6.6Meta-alunogenAl2(SO4)3 · 12H2O
25.6.7AlunogenAl2(SO4)3 · 17H2OTric. 1
25.6.8FelsőbányaiteAl4(SO4)(OH)10 · 4H2OMon. 2 : P21
25.6.9BasaluminiteAl4(SO4)(OH)10 · 4H2OHex.
25.6.10HydrobasaluminiteAl4(SO4)(OH)10 · 12-36H2OMon.
25.6.11ZaheriteAl12(SO4)5(OH)26 · 20H2OTric.
25.6.12TamarugiteNaAl(SO4)2 · 6H2OMon. 2/m
25.6.13MendoziteNaAl(SO4)2 · 11H2OMon. 2/m
25.6.14Alum-(Na)NaAl(SO4)2 · 12H2O
25.6.15NatroaluniteNaAl3(SO4)2(OH)6Trig. 3m : R3m
25.6.16KaliniteKAl(SO4)2 · 11H2OMon. 2/m : B2/b
25.6.17Alum-(K)KAl(SO4)2 · 12H2OIso. m3 (2/m 3)
25.6.18AluniteKAl3(SO4)2(OH)6Trig. 3m : R3m
25.6.20Tschermigite(NH4)Al(SO4)2 · 12H2OIso. m3 (2/m 3) : Pa3

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 Natroalunite-2cHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Ossaka, J., Hirabahashi, J.-I., Okada, K., Kobayashi, R. & Hayashi, T. (1982): Crystal structure of minamiite, a new mineral of the alunite group. American Mineralogist: 67: 114-119.
Bayliss, P., Kolitsch, U., Nickel, E.H., Pring, A. (2010): Alunite supergroup: recommended nomenclature. Mineralogical Magazine, 74, 919-927.

Internet Links for Natroalunite-2cHide

Localities for Natroalunite-2cHide

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.
Bulgaria
 
  • Pazardzhik Oblast (Pazardjik Oblast)
    • Panagyurishte (Panagurishte) Obshtina
      • Popintsi
Hikov, C. A. (2004): Huangite and Minamiite from Petelovo Deposit, Central Srednogorie. Comptes Rendus de l'Académie Bulgare des Sciences 57, 59-64.; Hikov, A., N. Velinova, S. Georgieva, A. Kunov (2011) Aluminium-phosphate-sulphate (APS) minerals in Bulgaria: characteristics and possibility for preservation. - In: V Intern. Symp. “Mineral Diversity Research and Preservation”, 9-15 October 2009, Sofia, Working papers, 37-48.
Chile
 
  • Coquimbo Region
    • Elqui Province
      • El Indio deposit
Deyell, C. L., Rye, R. O., Landis, G. P., & Bissig, T. (2005). Alunite and the role of magmatic fluids in the Tambo high-sulfidation deposit, El Indio–Pascua belt, Chile. Chemical Geology, 215(1), 185-218.
  • Tarapacá Region
    • El Tamarugal Province
      • Pampa del Tamarugal
Peter G. Seroka collection
Japan (FRL)
 
  • Honshu Island
    • Kanto Region
      • Gunma Prefecture
Amer.Min.(1982) 67, 114-119; Mineralogical Journal Vol. 20 (1998) , No. 1 pp 1-8
  • Kyushu Region
    • Kagoshima Prefecture
      • Satsuma Peninsula
        • Iwato mine
Econ Geol (1989) 84:663-675
  • Tokyo Metropolis
    • Izu Archipelago
      • Aogashima
PXRD by John Attard, 27-02-2015, on material field-collected by Alfredo Petrov, 4-2014.
Mineral and/or Locality  
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