Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Chat Now! (2 online) Mindat Auctions

Fencooperite

Big Photo

Trumbull Peak, Incline, Mariposa Co., California, USA
© Maurice de Graaf

Formula:
Ba
 
6
Fe
3+
3
Si
 
8
O
 
23
(CO
 
3
)
 
2
Cl
 
3
·H
 
2
O
System:TrigonalColour:Black
Hardness:4½ - 5
Name:Named for California mineral collector Fen Cooper.
This page provides mineralogical data about Fencooperite.

Classification of Fencooperite

IMA status:Approved 2000
Strunz 8th edition ID:8/C.37-10
Nickel-Strunz 10th (pending) edition ID:9.BH.20

9 : SILICATES (Germanates)
B : Sorosilicates
H : Sorosilicates with Si3O10, Si4O11, etc. anions; cations in tetrahedral [4] and greater coordination
mindat.org URL:http://www.mindat.org/min-10343.html
Please feel free to link to this page.

Type Occurrence of Fencooperite

Type Locality:Trumbull Peak, Incline, Mariposa Co., California, USA

Physical Properties of Fencooperite

Lustre:Adamantine, Vitreous
Colour:Black
Streak:Greyish black
Hardness (Mohs):4½ - 5

Crystallography of Fencooperite

Crystal System:Trigonal
Class (H-M):3m - Ditrigonal Pyramidal
Space Group:P3m1
Cell Parameters:a = 10.727Å, c = 7.085Å
Ratio:a:c = 1 : 0.66
Unit Cell Volume:V 706.1 ų

Optical Data of Fencooperite

Type:Isotropic (-)
RI values: nω = 1.723 nε = 1.711
Maximum Birefringence:δ = 0.012 - Isotropic minerals have no birefringence
Surface Relief:High

Chemical Properties of Fencooperite

Formula:
Ba
 
6
Fe
3+
3
Si
 
8
O
 
23
(CO
 
3
)
 
2
Cl
 
3
·H
 
2
O
Essential elements:Ba, C, Cl, Fe, H, O, Si
All elements listed in formula:Ba, C, Cl, Fe, H, O, Si

Relationship of Fencooperite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.BH.05Aminoffite
Ca
 
2
(Be,Al)Si
 
2
O
 
7
(OH)·H
 
2
O
9.BH.10Kinoite
Ca
 
2
Cu
 
2
(H
 
2
O)
 
2
[Si
 
3
O
 
10
]
9.BH.15Akatoreite
(Mn
2+
 
,Fe
2+
 
)
 
9
Al
 
2
[(OH)
 
3
|HSi
 
4
O
 
13
]
 
2

Other Names for Fencooperite

Synonyms:
IMA2000-023
Other Languages:
German:Fencooperit
Russian:Фенкуперит
Spanish:Fencooperita

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 Fencooperite

Reference List:Canadian Mineralogist: 39, 1059-1064,

Grice, J.D. (2001) The crystal structure of fencooperite: Unique [Fe3O13] pinwheels cross-connected by [Si8O22] islands. Canadian Mineralogist: 39: 1065-1071.

Internet Links for Fencooperite

Search Engines:
  • Look for Fencooperite on Google
  • Look for Fencooperite images on Google
    • External Links:
  • Look for Fencooperite on Webmineral
  • Look for Fencooperite on Athena Mineralogy
  • Look for Fencooperite on Wikipedia
  • Look for Fencooperite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Fencooperite in the Natural History Museum (London) online catalogue
    • Mineral Dealers:
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • Search for - Fencooperite - on e-Rocks Mineral Sales & Auctions
  • Top quality minerals from Kristalle of California
  • High-end worldwide specimens & outstanding customer service
  • Fine Minerals from Dan Weinrich Minerals
  • Wilensky Fine Minerals
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • Rare and Unusual minerals at Mineralogical Research Company
  • Fabre Minerals - search for Fencooperite specimens
  • The Arkenstone - Fine Minerals
  • Edwards Minerals - Fine Specimens
  • Buy fine minerals and gemstones from Pala International
    • Jobs:
  • Mining & Geology Jobs

    • Page Sponsor

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

    Localities for Fencooperite

    Hide Locality List
    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.
    (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.
    USA
     
    • California
      • Fresno Co.
        • Big Creek-Rush Creek District
          • Rush Creek deposit
            • Big Creek
    		Can. Min. 39:1065-1071.
      • Mariposa Co.
        • Incline
    		Canadian Mineralogist: 39(4): 1059
    Mineral and/or Locality
    Google
     
    www.mindat.org Web
    Copyright © Jolyon Ralph and Ida Chau 1993-2009. 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. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 7th Nov 2009 11:48:34