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Nicksobolevite

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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 (Николая Владимировича Соболева) (b. 28 May 1935), in recognition of his important contributions to mineralogy and petrology.
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.


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Classification of NicksoboleviteHide

Approved
Approval Year:
2013
First Published:
2014

Physical Properties of NicksoboleviteHide

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}.
Density:
4.18 g/cm3 (Calculated)
Comment:
Calculated based on the empirical chemical formula

Chemical Properties of NicksoboleviteHide

Formula:
Cu7(SeO3)2O2Cl6

Crystallography of NicksoboleviteHide

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)°
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 DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
8.25(77)
5.877(100)
4.239(26)
3.619(37)
3.257(95)
2.715(50)
2.668(26)
2.278(40)
Comments:
From Type Description.

Type Occurrence of NicksoboleviteHide

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 NicksoboleviteHide

Other InformationHide

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

References for NicksoboleviteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Vergasova, L.P., Semenova, T.F., Krivovichev, S.V., Filatov, S.K., Zolotarev, A.A., Jr and Ananiev, V.V. (2013) Nicksobolevite, IMA 2012-097. CNMNC Newsletter No. 16, August 2013, page 2699; Mineralogical Magazine: 77: 2695-2709.
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.

Internet Links for NicksoboleviteHide

Localities for NicksoboleviteHide

ⓘ - Click for 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Russia (TL)
 
  • Kamchatka Oblast'
    • Tolbachik volcano
      • Great Fissure eruption (Main Fracture)
        • Northern Breakthrough (North Breach)
Vergasova, L.P., Semenova, T.F.,Krivovichev, S.V., Filatov, S.K., Zolotarev,A.A., Jr and Ananiev, V.V. (2013) Nicksobolevite, IMA 2012-097. CNMNC Newsletter No. 16, August 2013, page 2699; Mineralogical Magazine, 77, 2695-2709.; 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.
Mineral and/or Locality  
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