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Avdoninite

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Blyava Cu deposit, Sakmara Zone, Mednogorsk District, Orenburgskaya Oblast', Urals Region, Russia
© Brent Thorne

Formula:
K
 
2
Cu
 
5
[(OH)
 
4
|Cl
 
8
] · H
 
2
O
System:MonoclinicColour:Green
Hardness:3
Name:For mineralogist V. N. Avdonin (b. 1925) of the Urals State Mining Academy.


A fumarole mineral. Also known as an anthropogenic product, forming pseudomorphs after steel (?) objects and oval flattened accumulations (Bushmakin et al., 1998).
Related to the synthetic phase K2Cu5Cl8(OH)4.2H2O (Kahlenberg, 2004).

Classification of Avdoninite

IMA status:Approved 2005
Strunz 8th edition ID:3/D.02-20
Nickel-Strunz 10th (pending) edition ID:3.DA.55

3 : HALIDES
D : Oxyhalides, hydroxyhalides and related double halides
A : With Cu, etc., without Pb
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Type Occurrence of Avdoninite

Type Locality:Yadovitaya fumarole, Second scoria cone, Northern Breakthrough (North Breach), Great Fissure (Main Fracture) eruption, Tolbachik volcano, Kamchatka Oblast', Far-Eastern Region, Russia
General Appearance of Type Material:Imperfect, short-prismatic, partly flattened crystals up to 0.2 mm in length in aggregates, and in pseudomorphs after melanothallite
Geological Setting of type material:Volcanic fumarole
Associated Minerals at type locality:
ParatacamiteLangbeiniteEuchlorineBelloiteAtacamite

Physical Properties of Avdoninite

Diaphaneity (Transparency):Transparent
Colour:Green
Hardness (Mohs):3
Cleavage:Perfect
on {100}
Density (measured):3.03 g/cm3

Crystallography of Avdoninite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Cell Parameters:a = 24.34Å, b = 5.878Å, c = 11.626Å
β = 93.3°
Ratio:a:b:c = 4.141 : 1 : 1.978
Unit Cell Volume:V 1660.6 ų
Z:4
Comment:Space group P2/m, Pm or P2
X-Ray Powder Diffraction:
d-spacingIntensity
11.63 (100)
5.80 (27)
5.88 (20)
2.518 (19)
5.73 (7)

Chemical Properties of Avdoninite

Formula:
K
 
2
Cu
 
5
[(OH)
 
4
|Cl
 
8
] · H
 
2
O
All elements listed in formula:Cl, Cu, H, K, O
Analyical Data:Results from electron probe microanalysis (EPMA):
K2O (11.94)
CuO (51.43)
Cl (37.07)
H2O (6.9)

less O = Cl (8.37)

sum: 98.97 wt.-%

Relationship of Avdoninite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
3.DA.05Melanothallite
Cu
 
2
[O|Cl
 
2
]
3.DA.10aAtacamite
Cu
 
2
[(OH)
 
3
|Cl]
3.DA.10bBotallackite
Cu
 
2
[(OH)
 
3
|Cl]
3.DA.10bClinoatacamite
Cu
 
2
[(OH)
 
3
|Cl]
3.DA.10aHibbingite
Fe
2+
2
[(OH)
 
3
|Cl]
3.DA.10aKempite
Mn
2+
2
[(OH)
 
3
|Cl]
3.DA.10cParatacamite
Cu
 
3
(Cu,Zn)[(OH)
 
3
|Cl]
 
2
3.DA.10bBelloite
Cu[OH|Cl]
3.DA.10cHerbertsmithite
Cu
 
3
Zn[(OH)
 
3
|Cl]
 
2
3.DA.10cKapellasite
Cu
 
3
Zn[(OH)
 
3
|Cl]
 
2
3.DA.10cGillardite
Cu
 
3
NiCl
 
2
(OH)
 
6
3.DA.10cHaydeeite
Cu
 
3
Mg(OH)
 
6
Cl
 
2
3.DA.15Claringbullite
Cu
 
4
[(OH)
 
7
|Cl] · nH
 
2
O
3.DA.20Simonkolleite
Zn
 
5
[(OH)
 
8
|Cl
 
2
] · H
 
2
O
3.DA.25Buttgenbachite
Cu
 
19
[(OH)
 
32
|(NO
 
3
)
 
2
|Cl
 
4
] · 2H
 
2
O
3.DA.25Connellite
Cu
 
19
[(OH)
 
32
|SO
 
4
|Cl
 
4
] · 3H
 
2
O
3.DA.30Abhurite
Sn
 
21
Cl
 
16
(OH)
 
14
O
 
6
3.DA.35Ponomarevite
K
 
4
Cu
 
4
[O|Cl
 
10
]
3.DA.40Anthonyite
Cu(OH,Cl)
 
2
 · 3H
 
2
O
3.DA.40Calumetite
Cu(OH,Cl)
 
2
 · 2H
 
2
O
3.DA.45Khaidarkanite
Na
 
0.34
Cu
 
4
Al
 
3
(OH)
 
14
F
 
3
·2H
 
2
O
3.DA.50Bobkingite
Cu
 
5
[(OH)
 
8
|Cl
 
2
] · 2H
 
2
O

Other Names for Avdoninite

Synonyms:
IMA2005-046a
Other Languages:
German:Avdoninit

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 Avdoninite

Reference List:Bushmakin A. F., Bazhenova L. F. (1998): Avdoninite, new mineral from technogene zone of Urals pyrite deposits. In: Ural'skiy mineralogicheskiy sbornik, N8 (Urals mineralogical collection, N 8), Rossiyskaya Akademiya Nauk, Ural'skoye Otdeleniye, Institut Mineralogii. Miass, Russian Federation, pp. 32-39.

Kahlenberg, V. (2004): On the crystal structure of K2Cu5Cl8(OH)4.2H2O. Zeitschrift für Anorganische und Allgemeine Chemie 630, 900-903.

N. V. Chukanov, M. N. Murashko, A. E. Zadov & A. F. Bushmakin (2006): Avdoninite, K2Cu5Cl8(OH)4• H2O, a new mineral from volcanic exhalations and from the zone of technogenesis at massive sulphide ore deposits. Proceedings of the Russian Mineralogical Society 135(3), 38–42.

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    Localities for Avdoninite

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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
          • Great Fissure (Main Fracture) eruption
            • Northern Breakthrough (North Breach)
              • Second scoria cone
    		N. V. Chukanov, M. N. Murashko, A. E. Zadov & A. F. Bushmakin (2006): Avdoninite, K2Cu5Cl8(OH)4• H2O, a new mineral from volcanic exhalations and from the zone of technogenesis at massive sulphide ore deposits. Proceedings of the Russian Mineralogical Society 135(3), 38–42
    • Urals Region
      • Orenburgskaya Oblast'
        • Mednogorsk District
          • Sakmara Zone
    		Rossiyskaya Akademiya Nauk, Ural'skoye Otdeleniye, Institut Mineralogii. Miass, Russian Federation 1998, 32-39.
    Mineral and/or Locality
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