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Alumoklyuchevskite

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Big Photo

Tolbachik volcano, Kamchatka Oblast', Far-Eastern Region, Russia
© Thomas Witzke

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Formula:
K
 
3
Cu
 
3
(Al,Fe
3+
 
)(SO
 
4
)
 
4
O
 
2
System:MonoclinicColour:dark green
Lustre:VitreousHardness:2 - 2½
Name:For being the aluminium dominant analogue of Klyuchevskite
This page provides mineralogical data about Alumoklyuchevskite.

Classification of Alumoklyuchevskite

IMA status:Approved 1993
Strunz 8th edition ID:6/B.05-45
Nickel-Strunz 10th (pending) edition ID: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
Dana 8th edition ID:28.4.6.2

28 : ANHYDROUS ACID AND NORMAL SULFATES
4 : Miscellaneous
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Type Occurrence of Alumoklyuchevskite

Type Locality:Great Fissure (Main Fracture) eruption, Tolbachik volcano, Kamchatka Oblast', Far-Eastern Region, Russia
Place of Conservation of Type Material:St. Petersburg Mining Institute, St. Petersburg, Russia, 2072/1.
Year of Discovery:1995
Geological Setting of type material:Deposited by fumarolic gases.
Associated Minerals at type locality:
TenoritePiypiteLangbeiniteLammeriteFedotovite
Averievite

Physical Properties of Alumoklyuchevskite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent
Colour:dark green
Hardness (Mohs):2 - 2½
Comment:2.3
Cleavage:Perfect
{h0l}, perfect

Crystallography of Alumoklyuchevskite

Crystal System:Monoclinic
Cell Parameters:a = 18.42Å, b = 5.13Å, c = 18.69Å
β = 101.72°
Ratio:a:b:c = 3.591 : 1 : 3.643
Unit Cell Volume:V 1,729.28 ų (Calculated from Unit Cell)
Morphology:Long prismatic to needlelike crystals, with equant cross section, elongated parallel [010], to 1 mm; in aggregates.

Optical Data of Alumoklyuchevskite

Type:Biaxial (+)
RI values: nα = 1.542 nβ = 1.548 nγ = 1.641
2V:Measured: 30° , Calculated: 30°
Maximum Birefringence:δ = 0.099

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low
Dispersion:weak

Chemical Properties of Alumoklyuchevskite

Formula:
K
 
3
Cu
 
3
(Al,Fe
3+
 
)(SO
 
4
)
 
4
O
 
2
Essential elements:Al, Cu, K, O, S
All elements listed in formula:Al, Cu, Fe, K, O, S

Relationship of Alumoklyuchevskite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
7.BC.05D'Ansite
Na
 
21
Mg(SO
 
4
)
 
10
Cl
 
3
7.BC.10Alunite
KAl
 
3
(SO
 
4
)
 
2
(OH)
 
6
7.BC.10Ammonioalunite
(NH
 
4
)Al
 
3
(SO
 
4
)
 
2
(OH)
 
6
7.BC.10Ammoniojarosite
(NH
 
4
)Fe
3+
3
(SO
 
4
)
 
2
(OH)
 
6
7.BC.10Argentojarosite
AgFe
3+
3
(SO
 
4
)
 
2
(OH)
 
6
7.BC.10Beaverite-(Cu)
Pb(Fe
3+
 
,Cu)
 
3
(SO
 
4
)
 
2
(OH)
 
6
7.BC.10Dorallcharite
(Tl,K)Fe
3+
3
(SO
 
4
)
 
2
(OH)
 
6
7.BC.10Huangite
Ca
 
0.5
Al
 
3
(SO
 
4
)
 
2
(OH)
 
6
7.BC.10Hydroniumjarosite
(H
 
3
O)Fe
3+
3
(SO
 
4
)
 
2
(OH)
 
6
7.BC.10Jarosite
KFe
3+
 
 
3
(SO
 
4
)
 
2
(OH)
 
6
7.BC.10Minamiite
(Na,Ca
 
0.5
,K)Al
 
3
(SO
 
4
)
 
2
(OH)
 
6
7.BC.10Natroalunite
(Na,K)Al
 
3
(SO
 
4
)
 
2
(OH)
 
6
7.BC.10Natrojarosite
NaFe
 
3
(SO
 
4
)
 
2
(OH)
 
6
7.BC.10Osarizawaite
Pb(Al,Cu)
 
3
(SO
 
4
)
 
2
(OH)
 
6
7.BC.10Plumbojarosite
Pb
 
0.5
Fe
3+
3
(SO
 
4
)
 
2
(OH)
 
6
7.BC.10Schlossmacherite
(H
 
3
O,Ca)Al
 
3
(SO
 
4
,AsO
 
4
)
 
2
(OH)
 
6
7.BC.10Walthierite
Ba
 
0.5
Al
 
3
(SO
 
4
)
 
2
(OH)
 
6
7.BC.15Ye'elimite
Ca
 
4
Al
 
6
(SO
 
4
)O
 
12
7.BC.20Atlasovite
K(BiO)Cu
 
6
Fe
3+
 
(SO
 
4
)
 
5
O
 
3
Cl
7.BC.20Nabokoite
KCu
 
7
(SO
 
4
)
 
5
(Te
4+
 
O
 
3
)OCl
7.BC.25Chlorothionite
K
 
2
Cu(SO
 
4
)Cl
 
2
7.BC.30Euchlorine
KNaCu
 
3
(SO
 
4
)
 
3
O
7.BC.30Fedotovite
K
 
2
Cu
 
3
(SO
 
4
)
 
3
O
7.BC.35Kamchatkite
KCu
 
3
(SO
 
4
)
 
2
OCl
7.BC.40Piypite
K
 
2
Cu
 
2
(SO
 
4
)
 
2
O
7.BC.45Klyuchevskite
K
 
3
Cu
 
3
(Fe
3+
 
,Al)(SO
 
4
)
 
4
O
 
2
7.BC.50Caledonite
Cu
 
2
Pb
 
5
(SO
 
4
)
 
3
(CO
 
3
)(OH)
 
6
7.BC.55Wherryite
Pb
 
7
Cu
 
2
(SO
 
4
)
 
4
(SiO
 
4
)
 
2
(OH)
 
2
7.BC.60Mammothite
Pb
 
6
Cu
 
4
AlSb(SO
 
4
)
 
2
(OH)
 
18
Cl
 
4
7.BC.65Linarite
PbCu(SO
 
4
)(OH)
 
2
7.BC.65Schmiederite
Pb
 
2
Cu
 
2
(Se
6+
 
O
 
4
)(Se
4+
 
O
 
3
)(OH)
 
4
7.BC.65Munakataite
Pb
 
2
Cu
 
2
(Se
4+
 
O
 
3
)(SO
 
4
)(OH)
 
4
7.BC.70Chenite
Pb
 
4
Cu(SO
 
4
)
 
2
(OH)
 
6
7.BC.75Krivovichevite
Pb
 
3
Al(SO
 
4
)(OH)
 
7
7.BC.80Anhydrokainite
KMg(SO
 
4
)Cl

Other Names for Alumoklyuchevskite

Synonyms:
AluminoklyuchevskiteIMA1993-004
Other Languages:
German:Aluminoklyuchevskit
Alumoklyuchevskit
Spanish:Aluminoklyuchevskita
Alumoklyuchevskita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Alumoklyuchevskite

Reference List:

- +
Mineralogical Record: 27: 116.

Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 124(1): 95-100.

Internet Links for Alumoklyuchevskite

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    • Localities for Alumoklyuchevskite

    The 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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    (TL) indicates type locality. ? 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.
    Russia
     
    • 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
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