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Zincaluminite

A valid IMA mineral species - grandfathered - questionable
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00437350017055941639379.jpg
Zincaluminite, etc.

Christiana Mine No. 132, Mercati mines, Agios Konstantinos, Lavrion mining district, Lavreotiki, East Attica, Attica, Greece
01942780014959289769563.jpg
Zincaluminite, etc.

Hilarion Mine, Kamariza Mines, Agios Konstantinos, Lavrion Mining District, Lavreotiki, East Attica, Attica, Greece
02205520014977149425674.jpg
Zincaluminite, etc.

Hilarion Mine, Kamariza Mines, Agios Konstantinos, Lavrion Mining District, Lavreotiki, East Attica, Attica, Greece
00437350017055941639379.jpg
Zincaluminite, etc.

Christiana Mine No. 132, Mercati mines, Agios Konstantinos, Lavrion mining district, Lavreotiki, East Attica, Attica, Greece
08553970015859427881074.jpg
Zincaluminite, etc.

Hilarion Mine, Kamariza Mines, Agios Konstantinos, Lavrion Mining District, Lavreotiki, East Attica, Attica, Greece
02638740014946280566462.jpg
Zincaluminite, etc.

Hilarion Mine, Kamariza Mines, Agios Konstantinos, Lavrion Mining District, Lavreotiki, East Attica, Attica, Greece
00437350017055941639379.jpg
Zincaluminite, etc.

Christiana Mine No. 132, Mercati mines, Agios Konstantinos, Lavrion mining district, Lavreotiki, East Attica, Attica, Greece
01942780014959289769563.jpg
Zincaluminite, etc.

Hilarion Mine, Kamariza Mines, Agios Konstantinos, Lavrion Mining District, Lavreotiki, East Attica, Attica, Greece
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About ZincaluminiteHide

Formula:
Zn6Al6(SO4)2(OH)16 · 5H2O
Colour:
White, bluish-white, pale blue; colourless in transmitted light.
Hardness:
2½ - 3
Specific Gravity:
2.26
Name:
From its composition, containing ZINC plus ALUM (aluminium sulfate) and its similarity to aluminite.
A questionable mineral with undetermined X-ray powder pattern and unknown crystallography. Compare also zincowoodwardite.

Note: a SEM-EDS analysis of a typical "zincaluminite" specimen from the Genna zinc smelter slag locality, Letmathe (there are several photos of similar looking specimens on Mindat) clearly conforms to brianyoungite (Christian Auer, written comm. to Uwe Kolitsch, July 2021).

As part of the recent re-evaluation of the nomenclature of the hydrotalcite supergroup (Mills et al., 2012), zincaluminite was confirmed to be a questionable species which needs further investigation.


Unique IdentifiersHide

Mindat ID:
4409
Long-form identifier:
mindat:1:1:4409:3
GUID
(UUID V4):
f8e7ff27-23e4-42e7-99f0-c31cb8c44e8f

IMA Classification of ZincaluminiteHide

IMA status:
Approved, 'Grandfathered' (first described prior to 1959), Questionable
IMA Formula:
(Zn1-xAlx)(SO4)x/2(OH)2 · nH2O (x < 0.5, n > 3x/2)
First published:
2012

Classification of ZincaluminiteHide

Strunz-mindat (2024):
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
Dana 8th ed.:
31.2.3.1

31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
2 : (AB)6(XO4)Zq·xH2O
Hey's CIM Ref.:
25.5.9

25 : Sulphates
5 : Sulphates of Zn and Hg

Mineral SymbolsHide

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

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

Pronunciation of ZincaluminiteHide

Pronunciation:
PlayRecorded byCountry
Jolyon RalphUnited Kingdom

Physical Properties of ZincaluminiteHide

Transparency:
Translucent
Colour:
White, bluish-white, pale blue; colourless in transmitted light.
Hardness:
2½ - 3 on Mohs scale
Density:
2.26 g/cm3 (Measured)    

Optical Data of ZincaluminiteHide

Type:
Uniaxial (-)
RI values:
nω = 1.534 nε = 1.514
Max Birefringence:
δ = 0.020
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Comments:
Biaaxial + at times, with a small 2V.

Chemistry of ZincaluminiteHide

Mindat Formula:
Zn6Al6(SO4)2(OH)16 · 5H2O
Elements listed:
Al, H, O, S, Zn - search for minerals with similar chemistry

Crystallography of ZincaluminiteHide

Morphology:
Minute crystals as very thin hexagonal plates, forming crusts; tufts.
Comment:
Hexagonal or orthorhombic

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]
Stage 10b: Anthropogenic minerals<10 Ka
56 : Slag and smelter minerals (see also #51 and #55)

Type Occurrence of ZincaluminiteHide

Type Locality:
ⓘ Hilarion Mine, Kamariza Mines (Kamareza Mines), Agios Konstantinos (Kamariza), Lavrion Mining District, Lavreotiki, East Attica, Attica, Greece
General Appearance of Type Material:
Minute thin hexagonal crystals, in tufts and crusts
Associated Minerals at Type Locality:
SmithsoniteSerpierite

Other Language Names for ZincaluminiteHide

Relationship of Zincaluminite to other SpeciesHide

Member of:
Glaucocerinite Group > Hydrotalcite Supergroup
Other Members of this group:
Carrboydite(Ni1-xAlx)(SO4)x/2(OH)2 · nH2OHex.
Glaucocerinite(Zn1-xAlx)(OH)2(SO4)x/2 · nH2OHex.
Hydrohonessite(Ni1-xFe3+x)(OH)2(SO4)x/2 · nH2OHex.
Mountkeithite[(Mg1-xFe3+x)(OH)2][SO4]x/2 · nH2OHex.

Common AssociatesHide

Associated Minerals Based on Photo Data:
12 photos of Zincaluminite associated with SerpieriteCa(Cu,Zn)4(SO4)2(OH)6 · 3H2O
7 photos of Zincaluminite associated with ZinciteZnO
7 photos of Zincaluminite associated with Aluminium-bearing Adamite(Zn,Al)2AsO4(OH,O)
2 photos of Zincaluminite associated with Copper-bearing Adamite(Zn,Cu)2AsO4OH
2 photos of Zincaluminite associated with Allophane(Al2O3)(SiO2)1.3-2 · 2.5-3H2O
1 photo of Zincaluminite associated with AzuriteCu3(CO3)2(OH)2
1 photo of Zincaluminite associated with WillemiteZn2SiO4
1 photo of Zincaluminite associated with Rosasite(Cu,Zn)2(CO3)(OH)2
1 photo of Zincaluminite associated with Aurichalcite(Zn,Cu)5(CO3)2(OH)6
1 photo of Zincaluminite associated with Slag

Related Minerals - Strunz-mindat GroupingHide

7.DD.AsagiiteNiCu4(SO4)2(OH)6 · 6H2OMon. 2/m : P21/b
7.DD.05FelsőbányaiteAl4(SO4)(OH)10 · 4H2OMon. 2 : P21
7.DD.07LlantenesiteCu6Al[SeO4](OH)12Cl · 3H2OTrig. 3m : P3 1c
7.DD.10LangiteCu4(SO4)(OH)6 · 2H2OMon. m
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.10FehriteMgCu4(SO4)2(OH)6 · 6H2OMon. 2/m : P21/b
7.DD.15SpangoliteCu6Al(SO4)(OH)12Cl · 3H2OTrig. 3m : P3 1c
7.DD.15KobyasheviteCu5(SO4)2(OH)6 · 4H2OTric. 1 : P1
7.DD.15Unnamed (Dimorph of Devilline)CaCu4(SO4)2(OH)6 · 3H2OMon. 2/m : P21/b
7.DD.20KtenasiteZnCu4(SO4)2(OH)6 · 6H2OMon. 2/m : P21/b
7.DD.25ChristeliteCu2Zn3(SO4)2(OH)6 · 4H2OTric. 1 : P1
7.DD.30CampigliaiteMn2+Cu4(SO4)2(OH)6 · 4H2OMon. 2 : B2
7.DD.30DevillineCaCu4(SO4)2(OH)6 · 3H2OMon. 2/m : P21/b
7.DD.30OrthoserpieriteCa(Cu,Zn)4(SO4)2(OH)6 · 3H2OOrth. mm2 : Pca21
7.DD.30SerpieriteCa(Cu,Zn)4(SO4)2(OH)6 · 3H2OMon. 2/m : B2/b
7.DD.30NiedermayriteCdCu4(SO4)2(OH)6 · 4H2OMon. 2/m : P21/m
7.DD.30EdwardsiteCu3Cd2(SO4)2(OH)6 · 4H2O Mon. 2/m : P21/b
7.DD.35Carrboydite(Ni1-xAlx)(SO4)x/2(OH)2 · nH2OHex.
7.DD.35Glaucocerinite(Zn1-xAlx)(OH)2(SO4)x/2 · nH2OHex.
7.DD.35Honessite(Ni1-xFe3+x)(OH)2[SO4]x/2 · nH2OTrig.
7.DD.35Hydrohonessite(Ni1-xFe3+x)(OH)2(SO4)x/2 · nH2OHex.
7.DD.35MotukoreaiteMg6Al3(OH)18[Na(H2O)6][SO4]2 · 6H2OTrig. 3m (3 2/m) : R3m
7.DD.35Mountkeithite[(Mg1-xFe3+x)(OH)2][SO4]x/2 · nH2OHex.
7.DD.35ShigaiteMn6Al3(OH)18[Na(H2O)6](SO4)2 · 6H2OTrig. 3 : R3
7.DD.35WermlanditeMg7Al2(OH)18[Ca(H2O)6][SO4]2 · 6H2OTrig. 3m (3 2/m) : P3c1
7.DD.35WoodwarditeCu1-xAlx(OH)2(SO4)x/2 · nH2OTrig. 3m (3 2/m) : R3m
7.DD.35Hydrowoodwardite(Cu1-xAlx)(OH)2[SO4]x/2 · nH2OTrig. 3m (3 2/m) : R3m
7.DD.35ZincowoodwarditeZn1-xAlx(OH)2[SO4]x/2 · nH2OTrig.
7.DD.35NatroglaucoceriniteZn6Al3(OH)18[Na(H2O)6](SO4)2 · 6H2OHex.
7.DD.35NikischeriteFe2+6Al3(OH)18[Na(H2O)6](SO4)2 · 6H2OTrig. 3 : R3
7.DD.40IsseliteCu6(SO4)(OH)10 · 5H2OOrth. mm2 : Pmn21
7.DD.40Lawsonbauerite(Mn2+,Mg)9Zn4(SO4)2(OH)22 · 8H2OMon. 2/m : P21/b
7.DD.40Torreyite(Mg,Mn2+)7◻2Mn2+2Zn4(SO4)2(OH)22 · 8H2OMon. 2/m : P21/b
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 · 3H2O Tric. 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/b
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/b
7.DD.70RedgilliteCu6(SO4)(OH)10 · H2OMon. 2/m : P21/b
7.DD.75ChalcoalumiteCuAl4(SO4)(OH)12 · 3H2OMon. 2 : P21
7.DD.75NickelalumiteNiAl4(SO4)(OH)12(H2O)3Mon. 2/m
7.DD.75KyrgyzstaniteZnAl4(SO4)(OH)12 · 3H2OMon. 2/m
7.DD.80GuarinoiteZn6(SO4)(OH)10 · 5H2OHex.
7.DD.80Schulenbergite(Cu,Zn)7(SO4)2(OH)10 · 3H2OTrig. 3
7.DD.80ThérèsemagnaniteNaCo4(SO4)(OH)6Cl · 6H2OTrig. 3 : P3
7.DD.80UM1992-30-SO:CCuHZn(Zn,Cu)7(SO4,CO3)2(OH)10 · 3H2OTrig. 3 : P3
7.DD.85MontetrisaiteCu6(SO4)(OH)10 · 2H2OOrth. mm2 : Cmc21

Other InformationHide

Notes:
Soluble in acids and alkalies.
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 ZincaluminiteHide

References for ZincaluminiteHide

Localities for ZincaluminiteHide

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.
Germany
 
  • North Rhine-Westphalia
    • Arnsberg
      • Märkischer Kreis
        • Iserlohn
          • Letmathe
            • Helmke quarry nature reserve
Verein der Hegauer Mineralienfreunde (1983) +3 other references
    • Cologne
      • Aachen
        • Stolberg
Neschen (n.d.)
Neschen (n.d.)
Greece (TL)
 
  • Attica
    • East Attica
      • Lavreotiki
        • Lavrion Mining District
          • Agios Konstantinos (Kamariza)
            • Kamariza Mines (Kamareza Mines)
Bertrand and Damour (1881) +2 other references
LAPIS 24 (7/8) +1 other reference
Heymann (1982)
            • Mercati mines
Fritz Schreiber collection
USA
 
  • Nevada
    • Lyon County
      • Wilson Mining District
        • Desert Creek Ranch
Castor et al. (2004)
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