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Georgbokiite

Big Photo

Second scoria cone, Northern Breakthrough (North Breach), Great Fissure (Main Fracture) eruption, Tolbachik volcano, Kamchatka Oblast', Far-Eastern Region, Russia
© Brent Thorne

Formula:
Cu
 
5
[O
 
2
|Cl
 
2
|(SeO
 
3
)
 
2
]
System:MonoclinicLustre:Vitreous
Hardness:4
Name:In honour of Prof. Dr. Georgiy Borisovich Bokii (1909-2000), Russian crystal chemist, for his contributions to crystal chemistry and mineralogy.
Dimorph of:Parageorgbokiite
This page provides mineralogical data about Georgbokiite.

Classification of Georgbokiite

IMA status:Approved 1996
Strunz 8th edition ID:4/K.05-50
Nickel-Strunz 10th (pending) edition ID:4.JG.05

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
G : Selenites with additional anions, without H2O
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Type Occurrence of Georgbokiite

Type Locality:Great Fissure (Main Fracture) eruption, Tolbachik volcano, Kamchatka Oblast', Far-Eastern Region, Russia

Physical Properties of Georgbokiite

Lustre:Vitreous
Hardness (Mohs):4

Crystallography of Georgbokiite

Crystal System:Monoclinic

Optical Data of Georgbokiite

Type:Biaxial (-)
RI values: nα = 2.060 nβ = 2.110 nγ = 2.150
Maximum Birefringence:δ = 0.090

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High
Dispersion:r < v strong

Chemical Properties of Georgbokiite

Formula:
Cu
 
5
[O
 
2
|Cl
 
2
|(SeO
 
3
)
 
2
]
Essential elements:Cl, Cu, O, Se
All elements listed in formula:Cl, Cu, O, Se

Relationship of Georgbokiite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.JG.Prewittite
KPb
 
1.5
ZnCu
 
6
[O
 
2
|Cl
 
10
|(SeO
 
3
)
 
2
]
4.JG.05Parageorgbokiite
Cu
 
5
[O
 
2
|Cl
 
2
|(SeO
 
3
)
 
2
]
4.JG.10Chloromenite
Cu
 
9
[O
 
2
|Cl
 
6
|(SeO
 
3
)
 
4
]
4.JG.15Sophiite
Zn
 
2
[Cl
 
2
|SeO
 
3
]
4.JG.20Ilinskite
(Na,K)Cu
 
5
[O
 
2
|Cl
 
3
|(SeO
 
3
)
 
2
]
4.JG.25Francisite
Cu
 
3
Bi(SeO
 
3
)
 
2
O
 
2
Cl
4.JG.30Derriksite
Cu
 
4
UO
 
2
(SeO
 
3
)
 
2
(OH)
 
6
·H
 
2
O
4.JG.35Burnsite
KCdCu
2+
7
[O
 
2
|Cl
 
9
|(SeO
 
3
)
 
2
]
4.JG.40Allochalcoselite
Cu
+
 
PbCu
2+
5
[O
 
2
|Cl
 
5
|(SeO
 
3
)
 
2
]

Other Names for Georgbokiite

Synonyms:
IMA1996-015
Other Languages:
German:Georgbokiit
Spanish:Georgbokiita

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 Georgbokiite

Reference List:Doklady Akademii Nauk: 364(4): 527-531.

Articles/Blogs about Georgbokiite

Internet Links for Georgbokiite

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    Localities for Georgbokiite

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    Russia
     
    • Far-Eastern Region
      • Kamchatka Oblast'
        • Tolbachik volcano
    		[MinRec 31:201]
            • Northern Breakthrough (North Breach)
            • Southern Breakthrough (South Breach)
    Mineral and/or Locality
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