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Shubnikovite

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Formula:
Ca2Cu8(AsO4)6(OH)Cl · 7H2O
Colour:
Bright blue
Name:
Named after Aleksei Vasilievich Shubnikov (1887-1970), director crystallographic institute, Academy of sciences of the USSR.
A highly questionable mineral (cf. Giester et al., 2007); probably one of the arsenate members of the Lavendulan Group.


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Classification of ShubnikoviteHide

Approved, 'Grandfathered' (first described prior to 1959), Questionable
8.DG.05

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
G : With large and medium-sized cations, (OH, etc.):RO4< 0.5:1
42.8.8.1

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
8 : (AB)5(XO4)3Zq·xH2O
22.2.5

22 : Phosphates, Arsenates or Vanadates with other Anions
2 : Phosphates, arsenates or vanadates with chloride

Physical Properties of ShubnikoviteHide

Colour:
Bright blue

Optical Data of ShubnikoviteHide

Type:
Biaxial (-)
RI values:
nα = 1.640 nβ = 1.690 nγ = 1.690
Max Birefringence:
δ = 0.050
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
relatively weak

Chemical Properties of ShubnikoviteHide

Formula:
Ca2Cu8(AsO4)6(OH)Cl · 7H2O
IMA Formula:
Ca2Cu2+8(AsO4)6Cl(OH) · 7H2O(?)

Type Occurrence of ShubnikoviteHide

Other Language Names for ShubnikoviteHide

Related Minerals - Nickel-Strunz GroupingHide

8.DG.05LavendulanNaCaCu5(AsO4)4Cl · 5H2OMon. 2/m
8.DG.05SampleiteNaCaCu5(PO4)4Cl · 5H2OOrth. mmm (2/m 2/m 2/m) : Cmmm
8.DG.05ZdenĕkiteNaPbCu5(AsO4)4Cl · 5H2OMon. 2/m : P21/b
8.DG.05LemanskiiteNaCaCu5(AsO4)4Cl · 5H2OTet. 4 2 2 : P41 2 2

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

22.2.1SampleiteNaCaCu5(PO4)4Cl · 5H2OOrth. mmm (2/m 2/m 2/m) : Cmmm
22.2.2LavendulanNaCaCu5(AsO4)4Cl · 5H2OMon. 2/m
22.2.3ChlorapatiteCa5(PO4)3ClHex. 6/m : P63/m
22.2.4TurneaureiteCa5(AsO4)3ClHex.
22.2.6RichelsdorfiteCa2Cu5Sb(AsO4)4(OH)6Cl · 6H2OMon. 2/m
22.2.7AlforsiteBa5(PO4)3ClHex. 6/m : P63/m
22.2.8MorelanditeCa2Ba3(AsO4)3Cl
22.2.9PyromorphitePb5(PO4)3ClHex. 6/m : P63/m
22.2.10MimetitePb5(AsO4)3ClHex. 6/m : P63/m
22.2.11Mimetite-MPb5(AsO4)3ClMon. 2/m : P21/b
22.2.12SahlinitePb14(AsO4)2O9Cl4Mon.
22.2.13GeorgiadèsitePb4(AsO3)Cl4(OH)Mon.
22.2.14VanadinitePb5(VO4)3ClHex. 6/m : P63/m
22.2.15KombatitePb14(VO4)2O9Cl4Mon.
22.2.16LeningraditePbCu3(VO4)2ClOrth. mmm (2/m 2/m 2/m) : Ibam
22.2.17HedyphaneCa2Pb3(AsO4)3ClHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
22.2.18NealitePb4Fe2+(As3+O3)2Cl4 · 2H2OTric. 1 : P1

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 ShubnikoviteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Nefedov, Ye. (1953), Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 82: 311-317.
American Mineralogist (1055): 40: 552.
Giester, Gerald; Uwe Kolitsch ; Peter Leverett ; Peter Turner ; Peter A. Williams (2007) The crystal structures of lavendulan, sampleite, and a new polymorph of sampleite. European Journal of Mineralogy 19, 75-93.

Internet Links for ShubnikoviteHide

Localities for ShubnikoviteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - 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.
Greece
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
      • Lavrion District Mines
        • Agios Konstantinos [St Constantine] (Kamariza)
          • Kamariza Mines (Kamareza Mines)
            • Hilarion area
Wendel, W. (2000): Lavrion-News 2000. Lapis 25 (10), 45-47.; J. Gröbner und U. Kolitsch (2002): Neufunde von Laurion aus den Jahren 2001 und 2002. Aufschluss 53 (5-6), 363-371.
Russia (TL)
 
  • Eastern-Siberian Region
    • Tuva Republic
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Mineral and/or Locality  
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