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Nikischerite

A valid IMA mineral species
This page kindly sponsored by Tony Nikischer
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About NikischeriteHide

07596020017271929723156.jpg
Tony Nikischer
Formula:
Fe2+6Al3(OH)18[Na(H2O)6](SO4)2 · 6H2O
Colour:
Dark green, brownish
Lustre:
Greasy, Pearly, Dull
Hardness:
2
Specific Gravity:
2.33
Crystal System:
Trigonal
Name:
For American mineralogist and mineral dealer, Anthony J. Nikischer (b. 1949), who first analyzed the mineral.
The Fe analogue of shigaite and poellmannite.

May be confused with clinochlore and chamosite.

"Recent material from Huanuni labeled as nikischerite has be confirmed as a chlorite group mineral, not nikischerite. We were offered a number of Huanuni specimens from 2020-2021 and after analysis, returned them all." (Tony Nikischer, Mindat message https://www.mindat.org/mesg-603193.html, 2022).


Unique IdentifiersHide

Mindat ID:
10934
Long-form identifier:
mindat:1:1:10934:3

IMA Classification of NikischeriteHide

Classification of NikischeriteHide

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

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference for Standard
NikIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of NikischeriteHide

Greasy, Pearly, Dull
Transparency:
Transparent, Translucent
Colour:
Dark green, brownish
Comment:
Green when fresh; oxidises to ochre brown.
Streak:
Pale grayish green
Hardness:
Cleavage:
Perfect
Fracture:
Irregular/Uneven
Comment:
Crumbly
Density:
2.33(2) g/cm3 (Measured)    2.30 g/cm3 (Calculated)

Optical Data of NikischeriteHide

Type:
Uniaxial (-)
Pleochroism:
Non-pleochroic
Comments:
ε undetermined

Chemistry of NikischeriteHide

Mindat Formula:
Fe2+6Al3(OH)18[Na(H2O)6](SO4)2 · 6H2O
Element Weights:
Element% weight
O52.710 %
Fe29.050 %
Al7.018 %
S5.560 %
H3.670 %
Na1.993 %

Calculated from ideal end-member formula.
O
Fe
Al
S
H
Na

Crystallography of NikischeriteHide

Crystal System:
Trigonal
Class (H-M):
3 - Rhombohedral
Space Group:
R3
Cell Parameters:
a = 9.347(1) Å, c = 33.000(7) Å
Ratio:
a:c = 1 : 3.531
Unit Cell V:
2497 ų
Z:
3
Morphology:
Platy habit with dominant {001}.
Twinning:
None observed

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
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

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 7: Great Oxidation Event<2.4
47a : [Near-surface hydration of prior minerals]
47b : [Sulfates and sulfites]

Type Occurrence of NikischeriteHide

General Appearance of Type Material:
Small micaceous plates, to 4 mm, forming isolated raditing balls and aggregates reaching 1 cm across.
Place of Conservation of Type Material:
Canadian Museum of Nature, Ottawa, Ontario, Canada (CMNMC 83499).
Geological Setting of Type Material:
Low temperature hydrothermal veins.
Associated Minerals at Type Locality:

Synonyms of NikischeriteHide

Other Language Names for NikischeriteHide

Simplified Chinese:羟铝钠铁矾
Spanish:Nikischerita
Traditional Chinese:羥鋁鈉鐵礬

Relationship of Nikischerite to other SpeciesHide

Other Members of Wermlandite Group:
ErssoniteMg7Fe3+2(OH)18[Ca(H2O)6](SO4)2 · 12H2OTrig. 3m(32/m) : P3c1
KarchevskyiteMg18Al9(OH)54Sr2(CO3)9(H2O)6(H3O)5Trig.
MotukoreaiteMg6Al3(OH)18[Na(H2O)6][SO4]2 · 6H2OTrig. 3m(32/m) : R3m
NatroglaucoceriniteZn6Al3(OH)18[Na(H2O)6](SO4)2 · 6H2OHex.
ShigaiteMn6Al3(OH)18[Na(H2O)6](SO4)2 · 6H2OTrig. 3 : R3
WermlanditeMg7Al2(OH)18[Ca(H2O)6][SO4]2 · 6H2OTrig. 3m(32/m) : P3c1

Common AssociatesHide

Associations Based on Photo Data:
2 photos of Nikischerite associated with VivianiteFe2+Fe2+2(PO4)2 · 8H2O
2 photos of Nikischerite associated with SideriteFeCO3
2 photos of Nikischerite associated with PyriteFeS2

Related Minerals - Strunz-mindat GroupingHide

7.DD.AsagiiteNiCu4(SO4)2(OH)6 · 6H2OMon. 2/m : P21/c
7.DD.05FelsőbányaiteAl4(SO4)(OH)10 · 4H2OMon. 2 : P21
7.DD.07LlantenesiteCu6Al[SeO4](OH)12Cl · 3H2OTrig. 3m : P31c
7.DD.10LangiteCu4(SO4)(OH)6 · 2H2OMon. m
7.DD.10FehriteMgCu4(SO4)2(OH)6 · 6H2OMon. 2/m : P21/c
7.DD.10PosnjakiteCu4(SO4)(OH)6 · H2OMon. m : Pm
7.DD.10WroewolfeiteCu4(SO4)(OH)6 · 2H2OMon. m : Pm
7.DD.10GobeliniteCoCu4(SO4)2(OH)6 · 6H2OMon. 2/m : P21/m
7.DD.15KobyasheviteCu5(SO4)2(OH)6 · 4H2OTric. 1 : P1
7.DD.15SpangoliteCu6Al(SO4)(OH)12Cl · 3H2OTrig. 3m : P31c
7.DD.15'Unnamed (Dimorph of Devilline)'CaCu4(SO4)2(OH)6 · 3H2OMon. 2/m : P21/c
7.DD.20KtenasiteZnCu4(SO4)2(OH)6 · 6H2OMon. 2/m : P21/c
7.DD.25ChristeliteCu2Zn3(SO4)2(OH)6 · 4H2OTric. 1 : P1
7.DD.30EdwardsiteCu3Cd2(SO4)2(OH)6 · 4H2O Mon. 2/m : P21/c
7.DD.30NiedermayriteCdCu4(SO4)2(OH)6 · 4H2OMon. 2/m : P21/m
7.DD.30SerpieriteCa(Cu2+,Zn2+)4(S6+O4)2(OH)6 · 3H2OMon. 2/m : B2/b
7.DD.30CampigliaiteMn2+Cu4(SO4)2(OH)6 · 4H2OMon. 2 : B2
7.DD.30OrthoserpieriteCa(Cu,Zn)4(SO4)2(OH)6 · 3H2OOrth. mm2 : Pca21
7.DD.30DevillineCaCu4(SO4)2(OH)6 · 3H2OMon. 2/m : P21/c
7.DD.35ShigaiteMn6Al3(OH)18[Na(H2O)6](SO4)2 · 6H2OTrig. 3 : R3
7.DD.35Zincaluminite(Zn1-xAlx)(SO4)x/2(OH)2 · nH2O
7.DD.35ZincowoodwarditeZn1-xAlx(OH)2[SO4]x/2 · nH2OTrig.
7.DD.35NatroglaucoceriniteZn6Al3(OH)18[Na(H2O)6](SO4)2 · 6H2OHex.
7.DD.35Hydrowoodwardite(Cu1-xAlx)(OH)2[SO4]x/2 · nH2OTrig. 3m(32/m) : R3m
7.DD.35Honessite(Ni1-xFe3+x)(OH)2[SO4]x/2 · nH2OTrig.
7.DD.35Carrboydite(Ni1-xAlx)(SO4)x/2(OH)2 · nH2OHex.
7.DD.35Glaucocerinite(Zn1-xAlx)(OH)2(SO4)x/2 · nH2OHex.
7.DD.35WermlanditeMg7Al2(OH)18[Ca(H2O)6][SO4]2 · 6H2OTrig. 3m(32/m) : P3c1
7.DD.35Hydrohonessite(Ni1-xFe3+x)(OH)2(SO4)x/2 · nH2OHex.
7.DD.35WoodwarditeCu1-xAlx(OH)2(SO4)x/2 · nH2OTrig. 3m(32/m) : R3m
7.DD.35MotukoreaiteMg6Al3(OH)18[Na(H2O)6][SO4]2 · 6H2OTrig. 3m(32/m) : R3m
7.DD.35Mountkeithite[(Mg1-xFe3+x)(OH)2][SO4]x/2 · nH2OHex.
7.DD.40Lawsonbauerite(Mn2+,Mg)9Zn4(SO4)2(OH)22 · 8H2OMon. 2/m : P21/c
7.DD.40Torreyite(Mg,Mn2+)7◻2Mn2+2Zn4(SO4)2(OH)22 · 8H2OMon. 2/m : P21/c
7.DD.40IsseliteCu6(SO4)(OH)10(H2O)4 · H2OOrth. mm2 : Pmn21
7.DD.45MooreiteMg9◻2Mn2Zn4(SO4)2(OH)26 · 8H2OMon. 2/m : P2/b
7.DD.45Hodgesmithite(Cu,Zn)6Zn(SO4)2(OH)10 · 3H2OTrig. 3 : P3
7.DD.47LahnsteiniteZn4(SO4)(OH)6 · 3H2OTric. 1 : P1
7.DD.50NamuwiteZn4(SO4)(OH)6 · 4H2OTrig. 3 : P3
7.DD.50Minohlite(Cu,Zn)7(SO4)2(OH)10 · 8H2OHex.
7.DD.52LauraniiteCu6Cd2(SO4)2(OH)12 · 5H2OMon. 2/m : P21/c
7.DD.55BechereriteZn7Cu(OH)13[(SiO(OH)3(SO4)]Trig. 3 : P3
7.DD.60Ramsbeckite(Cu,Zn)15(SO4)4(OH)22 · 6H2OMon. 2/m
7.DD.65VonbezingiteCa6Cu3(SO4)3(OH)12 · 2H2OMon. 2/m : P21/c
7.DD.70RedgilliteCu6(SO4)(OH)10 · H2OMon. 2/m : P21/c
7.DD.75NickelalumiteNiAl4(SO4)(OH)12(H2O)3Mon. 2/m : P21/c
7.DD.75KyrgyzstaniteZnAl4(SO4)(OH)12 · 3H2OMon. 2/m : P21/c
7.DD.75ChalcoalumiteCuAl4(SO4)(OH)12 · 3H2OMon. 2 : P21
7.DD.80Schulenbergite(Cu,Zn)7(SO4)2(OH)10 · 3H2OTrig. 3
7.DD.80'UM1992-30-SO:CCuHZn'(Zn,Cu)7(SO4,CO3)2(OH)10 · 3H2OTrig. 3 : P3
7.DD.80ThérèsemagnaniteNaCo4(SO4)(OH)6Cl · 6H2OTrig. 3 : P3
7.DD.80GuarinoiteZn6(SO4)(OH)10 · 5H2OHex.
7.DD.85MontetrisaiteCu6(SO4)(OH)10 · 2H2OOrth. mm2 : Cmc21

Fluorescence of NikischeriteHide

Not fluorescent

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 NikischeriteHide

References for NikischeriteHide

Localities for NikischeriteHide

Showing 1 localities.

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.
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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.
Bolivia (TL)
 
  • Oruro
    • Pantaleón Dalence Province
      • Huanuni
Roberts et al. (2003) +1 other reference
 
and/or  
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