Help mindat.org|Log In|Register|
Home PageMindat NewsThe Mindat ManualHistory of MindatCopyright StatusManagement TeamContact UsAdvertise on Mindat
Donate to MindatSponsor a PageSponsored PagesTop Available PagesMindat AdvertisersAdvertise on MindatThe Mindat Store
Minerals by PropertiesMinerals by ChemistryRandom MineralSearch by minIDLocalities Near MeSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportAdd Glossary Item
StatisticsMember ListBooks & MagazinesMineral Shows & EventsThe Mindat DirectoryHow to Link to MindatDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Shubnikovite

This page is currently not sponsored. Click here to sponsor this page.
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.

Classification of Shubnikovite

Questionable/Doubtful
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
mindat.org URL:
http://www.mindat.org/min-3641.html
Please feel free to link to this page.

First Recorded Occurrence of Shubnikovite

Year of Discovery:
1953

Physical Properties of Shubnikovite

Colour:
Bright blue

Optical Data of Shubnikovite

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 Shubnikovite

Formula:
Ca2Cu8(AsO4)6(OH)Cl · 7H2O
Essential elements:
All elements listed in formula:

Relationship of Shubnikovite to other Species

8.DG.05LavendulanNaCaCu5(AsO4)4Cl · 5H2O
8.DG.05SampleiteNaCaCu5(PO4)4Cl · 5H2O
8.DG.05ZdenĕkiteNaPbCu5(AsO4)4Cl · 5H2O
8.DG.05LemanskiiteNaCaCu5(AsO4)4Cl · 5H2O
22.2.1SampleiteNaCaCu5(PO4)4Cl · 5H2O
22.2.2LavendulanNaCaCu5(AsO4)4Cl · 5H2O
22.2.3ChlorapatiteCa5(PO4)3Cl
22.2.4TurneaureiteCa5(AsO4)3Cl
22.2.6RichelsdorfiteCa2Cu5Sb(AsO4)4(OH)6Cl · 6H2O
22.2.7AlforsiteBa5(PO4)3Cl
22.2.8MorelanditeCa2Ba3(AsO4)3Cl
22.2.9PyromorphitePb5(PO4)3Cl
22.2.10MimetitePb5(AsO4)3Cl
22.2.11Mimetite-MPb5(AsO4)3Cl
22.2.12SahlinitePb14(AsO4)2O9Cl4
22.2.13GeorgiadèsitePb4(AsO3)Cl4(OH)
22.2.14VanadinitePb5(VO4)3Cl
22.2.15KombatitePb14(VO4)2O9Cl4
22.2.16LeningraditePbCu3(VO4)2Cl
22.2.17HedyphanePb3Ca2(AsO4)3Cl
22.2.18NealitePb4Fe2+(As3+O3)2Cl4 · 2H2O

Other Names for Shubnikovite

Name in Other Languages:

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.

References for Shubnikovite

Reference List:
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 Shubnikovite

Localities for Shubnikovite

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.
Mineral and/or Locality  
Copyright © mindat.org 1993-2015, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: January 28, 2015 09:21:12