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Alumoklyuchevskite

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About AlumoklyuchevskiteHide

Formula:
K3Cu3(Al,Fe3+)(SO4)4O2
Colour:
dark green
Lustre:
Vitreous
Hardness:
2 - 2½
Crystal System:
Triclinic
Name:
For being the aluminium dominant analogue of Klyuchevskite
The recent structure refinement is done by Siidra et al. (2016). The structure may be understood as an example of "host-guest" principle, an this is attributable to other Cu oxysulphate minerals.



Classification of AlumoklyuchevskiteHide

Approved
Approval Year:
1993
7.BC.45

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
B : Sulfates (selenates, etc.) with additional anions, without H2O
C : With medium-sized and large cations
28.4.6.2

28 : ANHYDROUS ACID AND NORMAL SULFATES
4 : Miscellaneous

Physical Properties of AlumoklyuchevskiteHide

Vitreous
Transparency:
Transparent
Colour:
dark green
Hardness:
2 - 2½ on Mohs scale
Comment:
2.3
Cleavage:
Perfect
{h0l}, perfect

Optical Data of AlumoklyuchevskiteHide

Type:
Biaxial (+)
RI values:
nα = 1.542 nβ = 1.548 nγ = 1.641
2V:
Measured: 30° , Calculated: 30°
Max Birefringence:
δ = 0.099
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
weak

Chemical Properties of AlumoklyuchevskiteHide

Formula:
K3Cu3(Al,Fe3+)(SO4)4O2
IMA Formula:
K3Cu2+3AlO2(SO4)4

Crystallography of AlumoklyuchevskiteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 4.952(3) Å, b = 11.978(6) Å, c = 14.626(12) Å
α = 87.119(9)°, β = 80.251(9)°, γ = 78.070(9)°
Ratio:
a:b:c = 0.413 : 1 : 1.221
Unit Cell V:
863.9 ų
Morphology:
Long prismatic to needlelike crystals, with equant cross section, elongated parallel [010], to 1 mm; in aggregates.
Comment:
Originally assumed to be monoclinic, I2, a = 18.772(7), b = 4.967(2), c = 18.468(7) Å, β = 101.66(1)°, V = 1686(1) Å (Krivovichev et al., 2009).

Type Occurrence of AlumoklyuchevskiteHide

Place of Conservation of Type Material:
St. Petersburg Mining Institute, St. Petersburg, Russia, 2072/1.
Geological Setting of Type Material:
Deposited by fumarolic gases.
Associated Minerals at Type Locality:

Synonyms of AlumoklyuchevskiteHide

Other Language Names for AlumoklyuchevskiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Euchlorine1 photo of Alumoklyuchevskite associated with Euchlorine on mindat.org.
Lyonsite1 photo of Alumoklyuchevskite associated with Lyonsite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

7.BC.Adranosite-(Fe)(NH4)4NaFe3+2(SO4)4Cl(OH)2Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
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.10Natroalunite-2c(Na,Ca0.5,K)Al3(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.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

28.4.6.1Pyracmonite(NH4)3Fe(SO4)3Trig. 3m : R3c

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 AlumoklyuchevskiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Mineralogical Record: 27: 116.
Gorskaya M G, Vergasova L P, Filatov S K, Rolich D V, Ananiev V V (1995) Alumoklyuchevskite, K3Cu3AlO2(SO4)4, a new oxysulfate of K, Cu, and Al from volcanic exhalations, Kamchatka, Russia. Zapiski Vserossijskogo Mineralogicheskogo Obshchestva 124, 95-100.
Krivovichev S V, Filatov S K, Cherepansky P N (2008) Crystal structure of alumoklyuchevskite, K3Cu3AlO2(SO4)4. Zapiski Rossiiskogo Mineralogicheskogo Obshchetstva 137, 114-122 (in Russian).
Krivovichev S V, Filatov S K, Cherepansky P N (2009) The crystal structure of alumoklyuchevskite, K3Cu3AlO2(SO4)4. Geology of Ore Deposits 51, 656-662
Siidra, O.I., Nazarchuk, E.V., Zaitsev, A.N., Lukina, E.A., Avdontseva, E.Y., Vergasova, L.P., Vlasenko, N.S., Filatov, S.K., Turner, R., Karpov, G.A. (2017): Copper oxosulphates from fumaroles of Tolbachik Vulcano: puninite, Na2Cu3O(SO4)3 - a new mineral species and structure refinements of kamchatkite and alumoklyuchevskite. European Journal of Mineralogy: 29: 499-510

Internet Links for AlumoklyuchevskiteHide

Localities for AlumoklyuchevskiteHide

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.
Russia (TL)
 
  • Far-Eastern Region
    • Kamchatka Oblast'
      • Tolbachik volcano
[AmMin 84:685]; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
          • Northern Breakthrough (North Breach)
Pavel M. Kartashov analytical data Elena Yu. Bykova material; Vergasova, L.P., Krivovichev, S.V., Britvin, S.N., Burns, P.C., and Ananiev, V.V. (2004) Filatovite, K[(Al,Zn)2(As,Si)2O8], a new mineral species from the Tolbachik volcano, Kamchatka peninsula, Russia. European Journal of Mineralogy: 16(3): 533-536.
Zelenski, M.E., Zubkova, N.V., Pekov, I.V., Polekhovsky, Yu.S. & Pushcharovsky, D.Yu. (2012): Cupromolybdite, Cu3O(MoO4)2, a new fumarolic mineral from the Tolbachik volcano, Kamchatka Peninsula, Russia. European Journal of Mineralogy, 24, 749-757.
Mineral and/or Locality  
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