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Bornhardtite Subgroup

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About Bornhardtite SubgroupHide

Formula:
A2+D3+2Se4
A= Co2+, Ni2+
D= Co, Ni

Note: the D site is named as B in the IMA Proposal 17-H, to avoid confusion with Boron.
The Bornhardtite Subgroup is a subgroup of the Seleniospinel Group in the Spinel Supergroup.



Classification of Bornhardtite SubgroupHide

Notes:
IMA Approved Group Name
Approval History:
A classification of spinel supergroup was approved by IMA in march 2018 (Proposal 17-H).

Chemical Properties of Bornhardtite SubgroupHide

Formula:
A2+D3+2Se4

A= Co2+, Ni2+
D= Co, Ni

Note: the D site is named as B in the IMA Proposal 17-H, to avoid confusion with Boron.

Relationship of Bornhardtite Subgroup to other SpeciesHide

Other Members of this group:
NickeltyrrelliteCuNi2Se4Iso. m3m (4/m 3 2/m) : Fd3m
TyrrelliteCu(Co3+,Ni3+)2Se4Iso. m3m (4/m 3 2/m) : Fd3m
Group Members:
Bornhardtite Co2+Co3+2Se4Iso. m3m (4/m 3 2/m) : Fd3m
Trüstedtite Ni3Se4Iso.

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 Bornhardtite SubgroupHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
CNMNC Newsletter No. 42, April 2018, page xxx; Mineralogical Magazine: 82: xxx-xxx ( Proposal IMA 17-H).

Internet Links for Bornhardtite SubgroupHide

Localities for Bornhardtite SubgroupHide

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.
Argentina
 
  • Mendoza Province
    • Luján de Cuyo department
      • Cacheuta
[Bornhardtite] Grundmann, G., & Förster, H. J. (2018). The Sierra de Cacheuta Vein-Type Se Mineralization, Mendoza Province, Argentina. Minerals, 8(4), 127.
[Bornhardtite] Handbook of Mineralogy
Canada
 
  • Saskatchewan
[Bornhardtite] Handbook of Mineralogy
China
 
  • Sichuan
    • Ngawa Autonomous Prefecture (Aba Autonomous Prefecture)
      • Zoigê Co. (Ruo'ergai Co.)
[Trüstedtite] Anthony, J.W. et al.: Handbook of Mineralogy
Finland
 
  • North Ostrobothnia
[Trüstedtite] Econ Geol (1997) 92:468-484; Vuorelainen Y, Huhma A, Häkli A (1964): Sederholmite, wilkmanite, kullerudite, mäkinenite, and trüstedtite, five new nickel selenide minerals. Comptes Rendus de la Société Géologique de Finlande. 36, 113-125
[Trüstedtite] Compt.Rend.Soc.Geol.Finland,(1964) 36, 113-125
Germany
 
  • Lower Saxony
    • Goslar District
      • Langelsheim
        • Lautenthal
[Bornhardtite] Am. Mineral. (1956) 41, 164-165; Neues Jahrb. Mineral., Monatsh. (1955) 133–142; Weiss, S. (1990) Mineralfundstellen Atlas, Deutschland West. Weise Verlag, München, 320 pages.; Cabral, A. R., Koglin, N., & Bratz, H. (2012). Gold-bearing ferroselite (FeSe2) from Trogtal, Harz, Germany, and significance of its Co/Ni ratio. Journal of Geosciences, 57(4), 265-272.
    • Göttingen District
      • Osterode am Harz
        • Lerbach
[Bornhardtite] Weiss, S. (1990) Mineralfundstellen Atlas, Deutschland West. Weise Verlag, München, 320 pages.
  • Saxony-Anhalt
    • Mansfeld Basin
      • Mansfeld
[Bornhardtite] Wittern: "Mineralfundorte in Deutschland", 2001; Tischendorf, G. (1969). Sources of elements in selenide mineralization near Tilkerode (Harz). International Geology Review, 11(11), 1298-1301.
UK
 
  • England
    • Devon
      • Torbay
        • Torquay
[Trüstedtite] [Camm, 1995, 71 - "Gold in the Counties of Cornwall and Devon"]; C. J. Stanley, A. J. Criddle and D. Lloyd (1990) Precious and Base Metal Selenide Mineralization at Hope's Nose, Torquay, Devon. Mineralogical Magazine 54:485-493
 
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