Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Mineral Chatroom The Mindat Store

Mcconnellite

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

Merume river, Kamakusa, Mazaruni District, Guyana
© Brent Thorne




Formula:
CuCrO
 
2
System:TrigonalHardness:5½
Name:After Dr. Richard Bradford McConnell, former Director, British Guyana Geological Survey.


Delafossite Group.

Classification of Mcconnellite

IMA status:Approved
Strunz 8th edition ID:4/A.05-40
Nickel-Strunz 10th (pending) edition ID:4.AB.15

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
A : Metal: Oxygen = 2:1 and 1:1
B : M:O = 1:1 (and up to 1:1.25); with small to medium-sized cations only
Dana 8th edition ID:7.1.1.2

7 : MULTIPLE OXIDES
1 : ABX2
Hey's CIM Ref.:7.14.7

7 : Oxides and Hydroxides
14 : Oxides of Cr
mindat.org URL:http://www.mindat.org/min-2612.html
Please feel free to link to this page.

Type Occurrence of Mcconnellite

Type Locality:Merume river, Kamakusa, Mazaruni District, Guyana
Year of Discovery:1976

Physical Properties of Mcconnellite

Hardness (Mohs):5½

Crystallography of Mcconnellite

Crystal System:Trigonal
Cell Parameters:a = 2.97Å, c = 17.11Å
Ratio:a:c = 1 : 5.761
Unit Cell Volume:V 130.71 ų (Calculated from Unit Cell)

Chemical Properties of Mcconnellite

Formula:
CuCrO
 
2
Essential elements:Cr, Cu, O
All elements listed in formula:Cr, Cu, O

Relationship of Mcconnellite to other Species

Structurally related to group(s):
Delafossite Group
ABO
 
2
Related Minerals - Nickel-Strunz Grouping):

- +
4.AB.05Crednerite
CuMnO
 
2
4.AB.10Tenorite
CuO
4.AB.15Delafossite
CuFeO
 
2
4.AB.20Bromellite
BeO
4.AB.20Zincite
(Zn,Mn
2+
 
,Fe
2+
 
)O
4.AB.25Bunsenite
NiO
4.AB.25Lime
CaO
4.AB.25Manganosite
MnO
4.AB.25Monteponite
CdO
4.AB.25Periclase
MgO
4.AB.25Wüstite
FeO
4.AB.30Palladinite
PdO
Related Minerals - Hey's Index Grouping:

- +
7.14.1Eskolaite
Cr
 
2
O
 
3
7.14.2Bracewellite
CrO(OH)
7.14.3Grimaldiite
CrO(OH)
7.14.4Guyanaite
CrO(OH)
7.14.5Yimengite
K(Cr,Ti,Fe,Mg)
 
12
O
 
19
7.14.6Mathiasite
K(Ti,Cr,Fe,Mg,Zr)
 
21
O
 
38
7.14.8Redledgeite
Ba
 
x
([Cr,Fe,V]
3+
2x
Ti
 
8-2x
)O
 
16
7.14.9Hawthorneite
Ba(MgTi
 
3
Cr
 
4
Fe
 
4
)O
 
19
7.14.10Zincochromite
ZnCr
 
2
O
 
4
7.14.11Wattersite
(Hg
+
2
)
 
2
Hg
2+
 
(CrO
 
4
)O
 
2
7.14.12Chromite
FeCr
 
2
O
 
4
7.14.13Magnesiochromite
MgCr
 
2
O
 
4
7.14.14 Donathite

Other Names for Mcconnellite

Synonyms:
IMA1967-037
Other Languages:
German:McConnellit
Russian:Макконелит
Spanish:McConnellita

Other Information

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

References for Mcconnellite

Reference List:

- +
Milton, C., D.E. Appleman, M.H. Appleman, E.C.T. Chao, F. Cuttitta, J.I.
Dinnin, E.J. Dwornik, B.L. Ingram, and H.J. Rose, Jr. (1976) Merumite – a complex assemblage of chromium minerals from Guyana. U.S. Geological Survey Professional Paper 887: 1–29.

Geological Society of America, Program for Annual Meeting (1967) p. 151.

American Mineralogist (1977): 62: 593 (abstract).

Dannhauser, W. and P.A. Vaughan (1955) The crystal structure of cuprous chromite. Journal of the American Chemical Society: 77: 896-897.

Internet Links for Mcconnellite

Search Engines:
  • Look for Mcconnellite on Google
  • Look for Mcconnellite images on Google
    • External Links:
  • Look for Mcconnellite on Webmineral
  • Look for Mcconnellite on Athena Mineralogy
  • Look for Mcconnellite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • McConnellite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • Find Mcconnellite on www.crystalclassics.co.uk
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • Pricedownminerals.com - Reverse Auctions and Shop
  • Edwards Minerals - Fine Specimens
  • Fine Minerals from Weinrich Minerals, Inc.
  • The Arkenstone - Fine Minerals
  • Search for Mcconnellite from all mineral dealers at minfind.com
  • Buy RARE Minerals from Rocks of Africa
  • Search for minerals at Heliodor
  • Buy fine minerals and gemstones from Pala International
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • High-end worldwide specimens & outstanding customer service
    • Jobs:
  • Mining & Geology Jobs

    • Localities for Mcconnellite

    The 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.
    Hide Locality List
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Guyana
     
    • Mazaruni District
      • Kamakusa
    		Geol.Soc.Amer.,Progr.Ann. Meeting (1967) p. 151; MINERALOGICAL MAGAZINE, DECEMBER 1984, VOL. 48, PP. 560 2
    Namibia
     
    • Otjikoto (Oshikoto) Region
      • Tsumeb
    		Ettler, V., Johan, Z., Kříbek, B., Šebek, O. & Mihaljevič, M. (2009): Mineralogy and environmental stability of slags from the Tsumeb smelter, Namibia. Applied Geochemistry 24, 1-15.
    Mineral and/or Locality
    Search Google
     
    Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 18th Jun 2011 08:03:30
    Mineral and Locality Search
    Mineral:
    and/or Locality:
    Options
    Fade toolbar when not in focusFix toolbar to bottom of page
    Hide Social Media Links
    Slideshow frame delay seconds