Nicksobolevite
A valid IMA mineral species
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Nikolay Vladimirovich Sobolev
Formula:
Cu7(SeO3)2O2Cl6
Colour:
Dark red
Lustre:
Vitreous
Hardness:
2 - 2½
Specific Gravity:
4.18 (Calculated)
Crystal System:
Monoclinic
Name:
Named in honor of Academician Nikolay (Nick) Vladimirovich Sobolev (Николай Владимирович Соболев) (28 May 1935 - 25 March 2022), in recognition of his important contributions to mineralogy and petrology. See the caption of his photo for more details about him.
The most structurally complex and Cl-rich copper selenite chloride known so far (2013). Chemically related minerals include chloromenite, georgbokiite, and parageorgbokiite.
There are eight independent Cu sites, comprising both [5]Cu and [6]Cu. Copper forms O4Cu13 tetramers built of four corner-sharing OCu4 tetrahedra. The tetrahedra are surrounded by two independent selenite triangular pyramids, thus forming {[O4Cu13](SeO3)4} complexes || [210] and [−210]; these complex units are connected to form ladder-like layers, perpendicular to a. Cl anions link these layers in the [100] direction.
There are eight independent Cu sites, comprising both [5]Cu and [6]Cu. Copper forms O4Cu13 tetramers built of four corner-sharing OCu4 tetrahedra. The tetrahedra are surrounded by two independent selenite triangular pyramids, thus forming {[O4Cu13](SeO3)4} complexes || [210] and [−210]; these complex units are connected to form ladder-like layers, perpendicular to a. Cl anions link these layers in the [100] direction.
Unique Identifiers
Mindat ID:
43863
Long-form identifier:
mindat:1:1:43863:4
GUID
(UUID V4):
(UUID V4):
b994912d-06fa-4a03-a8ba-23bc179b9f83
IMA Classification of Nicksobolevite
Approved
Approval year:
2013
First published:
2014
Type description reference:
Vergasova, Lidiya P., Semenova, Tatiana F., Krivovichev, Sergey V., Filatov, Stanislav K., Zolotarev Jr, Andrey A., Ananiev, Vladimir V. (2014) Nicksobolevite, Cu7(SeO3)2O2Cl6, a new complex copper oxoselenite chloride from Tolbachik fumaroles, Kamchatka peninsula, Russia. European Journal of Mineralogy, 26 (3) 439-449 doi:10.1127/0935-1221/2014/0026-2383
Classification of Nicksobolevite
4.JG.45
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
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
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Nsb | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Nicksobolevite
Vitreous
Transparency:
Transparent
Colour:
Dark red
Streak:
Orange-red
Hardness:
2 - 2½ on Mohs scale
Comment:
Measured by microindentation
Tenacity:
Very brittle
Cleavage:
Perfect
Perfect on {010} and {−101} and good on {120}.
Perfect on {010} and {−101} and good on {120}.
Density:
4.18 g/cm3 (Calculated)
Comment:
Calculated based on the empirical chemical formula
Chemistry of Nicksobolevite
Mindat Formula:
Cu7(SeO3)2O2Cl6
Elements listed:
Crystallography of Nicksobolevite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 10.958(4) Å, b = 14.483(5) Å, c = 10.494(4) Å
β = 113.61(7)°, γ = 113.559(8)°
β = 113.61(7)°, γ = 113.559(8)°
Ratio:
a:b:c = 0.757 : 1 : 0.725
Unit Cell V:
1526 ų
Z:
4
Morphology:
Needle-like crystals elongated along [001], often forming aggregates.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 8.25 Å | (77) |
| 5.877 Å | (100) |
| 4.239 Å | (26) |
| 3.619 Å | (37) |
| 3.257 Å | (95) |
| 2.715 Å | (50) |
| 2.668 Å | (26) |
| 2.278 Å | (40) |
Comments:
From Type Description.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 45a : [Sulfates, arsenates, selenates, antimonates] | |
| 45b : [Other oxidized fumarolic minerals] |
Type Occurrence of Nicksobolevite
General Appearance of Type Material:
Aggregates of needle-like crystals up to 0.4 mm
Place of Conservation of Type Material:
Type material is deposited in the collections of the Mineralogical Museum, Department of Mineralogy, St Petersburg University, StPetersburg, Russia, catalogue number 1/19599
Geological Setting of Type Material:
Fumarole, Tolbachik volcano
Associated Minerals at Type Locality:
Reference:
Vergasova, L.P., Semenova, T.F., Krivovichev, S.V., Filatov, S.K., Zolotarev, A.A. (2014) Nicksobolevite, Cu7(SeO3)2O2Cl6, a new complex copper oxoselenite chloride from Tolbachik fumaroles, Kamchatka. European Journal of Mineralogy: 26: 439-449.
Synonyms of Nicksobolevite
Related Minerals - Strunz-mindat Grouping
| 4.JG. | Prewittite | KPb1.5ZnCu6(SeO3)2O2Cl10 |
| 4.JG. | Guangyuanite | Pb3Cl3(Se4+O3)(OH) |
| 4.JG. | Masaitisite | KCu5O2(SeO3)2Cl3 |
| 4.JG. | Wangkuirenite | Pb3Cl2(SeO3)2 |
| 4.JG.05 | Georgbokiite | Cu5(SeO3)2O2Cl2 |
| 4.JG.05 | Parageorgbokiite | Cu5(SeO3)2O2Cl2 |
| 4.JG.10 | Chloromenite | Cu9(SeO3)4O2Cl6 |
| 4.JG.15 | Sofiite | Zn2(SeO3)Cl2 |
| 4.JG.20 | Ilinskite | (Na,K)Cu5(SeO3)2O2Cl3 |
| 4.JG.25 | Francisite | Cu3Bi(SeO3)2O2Cl |
| 4.JG.30 | Derriksite | Cu4(UO2)(SeO3)2(OH)6 |
| 4.JG.35 | Burnsite | KCdCu2+7(SeO3)2O2Cl9 |
| 4.JG.40 | Allochalcoselite | Cu+PbCu2+5(SeO3)2Cl5O2 |
| 4.JG.50 | Plumboselite | Pb3O2(SeO3) |
| 4.JG.55 | Sarrabusite | Pb5CuCl4(SeO3)4 |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Nicksobolevite
mindat.org URL:
https://www.mindat.org/min-43863.html
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References for Nicksobolevite
Reference List:
Williams, P. A., Hatert, F., Pasero, M., Mills, S. J. (2013) New minerals and nomenclature modifications approved in 2013. CNMNC Newsletter No 16. Mineralogical Magazine, 77 (6) 2695-2709 doi:10.1180/minmag.2013.077.6.01
Vergasova, Lidiya P., Semenova, Tatiana F., Krivovichev, Sergey V., Filatov, Stanislav K., Zolotarev Jr, Andrey A., Ananiev, Vladimir V. (2014) Nicksobolevite, Cu7(SeO3)2O2Cl6, a new complex copper oxoselenite chloride from Tolbachik fumaroles, Kamchatka peninsula, Russia. European Journal of Mineralogy, 26 (3) 439-449 doi:10.1127/0935-1221/2014/0026-2383
Localities for Nicksobolevite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and 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).
All localities listed without proper references should be considered as questionable.
Russia (TL) | |
| Williams, P. A., Hatert, F., Pasero, M., Mills, S. J. (2013) New minerals and nomenclature modifications approved in 2013. CNMNC Newsletter No 16. Mineralogical Magazine, 77 (6) 2695-2709 doi:10.1180/minmag.2013.077.6.01 Vergasova, Lidiya P., Semenova, Tatiana F., Krivovichev, Sergey V., Filatov, Stanislav K., Zolotarev Jr, Andrey A., Ananiev, Vladimir V. (2014) Nicksobolevite, Cu7(SeO3)2O2Cl6, a new complex copper oxoselenite chloride from Tolbachik fumaroles, Kamchatka peninsula, Russia. European Journal of Mineralogy, 26 (3) 439-449 doi:10.1127/0935-1221/2014/0026-2383 |
