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Parageorgbokiite

Formula:
Cu
 
5
[O
 
2
|Cl
 
2
|(SeO
 
3
)
 
2
]
System:MonoclinicColour:Green
Hardness:3 - 4
Name:For G. B. Bokii (1909-2000), Russian crystal chemist, and the relationship to Georgbokiite.
Dimorph of:Georgbokiite


A volcanic fumarole mineral. Its temperature of formation is estimated to have been 400–625 °C.

Classification of Parageorgbokiite

IMA status:Approved 2006
Strunz 8th edition ID:4/K.05-52
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 Parageorgbokiite

Type Locality:Second scoria cone, Northern Breakthrough (North Breach), Great Fissure (Main Fracture) eruption, Tolbachik volcano, Kamchatka Oblast', Far-Eastern Region, Russia
Geological Setting of type material:Volcanic fumarole
Associated Minerals at type locality:
TolbachiteSophiiteRalstoniteMelanothalliteGold
EuchlorineChalcocyanite

Physical Properties of Parageorgbokiite

Lustre:Vitreous
Colour:Green
Hardness (Mohs):3 - 4
Density (calculated):4.7 g/cm3

Crystallography of Parageorgbokiite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:P21/b {P1 1 21/b} {P21/c} {P1 21/c 1} {P21/a}
Cell Parameters:a = 5.3982Å, b = 8.0543Å, c = 11.128Å
β = 99.258°
Ratio:a:b:c = 0.67 : 1 : 1.382
Unit Cell Volume:V 477.53 ų
Z:2
X-Ray Powder Diffraction:
d-spacingIntensity
3.01 (100)
3.22 (77)
4.8 (64)
4.33 (64)

Chemical Properties of Parageorgbokiite

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

Relationship of Parageorgbokiite 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.05Georgbokiite
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 Parageorgbokiite

Synonyms:
IMA2006-001
Other Languages:

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 Parageorgbokiite

Reference List:L. P. Vergasova, S. V. Krivovichev, S. K. Filatov, S. N. Britvin, P. C. Burns & V. V. Ananyev (2006): Parageorgbokiite, beta-Cu5O2(SeO3)2Cl2 – a new mineral from volcanic exhalation (Kamchatka Peninsula, Russia), Proceedings of the Russian Mineralogical Society 135(4), 24–28 (in Russian with English abstract).

Krivovichev, S.V., Filatov, S.K., Burns, P.C., Vergasova, L.P. (2007): The crystal structure of parageorgbokiite, β-Cu5O2(SeO3)2Cl2. Canadian Mineralogist, 45, 929-934.

Internet Links for Parageorgbokiite

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    Localities for Parageorgbokiite

    (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)
    		L. P. Vergasova, S. V. Krivovichev, S. K. Filatov, S. N. Britvin, P. C. Burns & V. V. Ananyev (2006): Parageorgbokiite, beta-Cu5O2(SeO3)2Cl2 – a new mineral from volcanic exhalation (Kamchatka Peninsula, Russia). Proceedings of the Russian Mineralogical Society 135(4), 24–28.
    Mineral and/or Locality
    Google
     
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