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

Brenkite

Big Photo

Schellkopf Mt., Brenk, Niederzissen, Eifel Mts, Rhineland-Palatinate, Germany
© C.H.M.-Schäfer

Show Brenkite Photos (15)
Formula:
Ca
 
2
[F
 
2
|CO
 
3
]
System:Orthorhombic
This page provides mineralogical data about Brenkite.

Classification of Brenkite

IMA status:Approved 1977
Strunz 8th edition ID:5/C.06-10
Nickel-Strunz 10th (pending) edition ID:5.BC.05

5 : CARBONATES (NITRATES)
B : Carbonates with additional anions, without H2O
C : With alkali-earth cations
Dana 8th edition ID:16a.3.6.1

16a : ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
3 : (AB)2(XO3)Zq
Hey's CIM Ref.:12.1.6

12 : Carbonates with other anions
1 : Carbonates with halides
mindat.org URL:http://www.mindat.org/min-764.html
Please feel free to link to this page.

Type Occurrence of Brenkite

Type Locality:Schellkopf Mt., Brenk, Niederzissen, Eifel Mts, Rhineland-Palatinate, Germany
Year of Discovery:1978

Crystallography of Brenkite

Crystal System:Orthorhombic
Cell Parameters:a = 7.65Å, b = 7.55Å, c = 6.54Å
Ratio:a:b:c = 1.013 : 1 : 0.866
Unit Cell Volume:V 377.73 ų (Calculated from Unit Cell)

Optical Data of Brenkite

Type:Biaxial (-)
RI values: nα = 1.525 nβ = 1.590 nγ = 1.593
2V:Measured: 26° to 28°, Calculated: 22°
Maximum Birefringence:δ = 0.068

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:r > v

Chemical Properties of Brenkite

Formula:
Ca
 
2
[F
 
2
|CO
 
3
]
Essential elements:C, Ca, F, O
All elements listed in formula:C, Ca, F, O

Relationship of Brenkite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
5.BC.10Rouvilleite
Na
 
3
(Ca,Mn,Fe)
 
2
(CO
 
3
)
 
3
F
5.BC.15Podlesnoite
BaCa
 
2
(CO
 
3
)
 
2
F
 
2
Related Minerals - Hey's Index Grouping:

- +
12.1.1Northupite
Na
 
3
Mg(CO
 
3
)
 
2
Cl
12.1.2Barentsite
Na
 
7
AlH
 
2
(CO
 
3
)
 
4
F
 
4
12.1.3Rouvilleite
Na
 
3
(Ca,Mn,Fe)
 
2
(CO
 
3
)
 
3
F
12.1.4Chlormagaluminite
(Mg,Fe
2+
 
)
 
4
Al
 
2
[(OH)
 
12
|(Cl
 
2
,CO
 
3
)] · 2H
 
2
O
12.1.5Defernite
Ca
 
6
(CO
 
3
)
 
2-x
(SiO
 
4
)
 
x
(OH)
 
7
(Cl,OH)
 
1-2x
 (x=0.5)
12.1.7Stenonite
(Sr,Ba,Na)
 
2
AlCO
 
3
F
 
5
12.1.8Bastnäsite-(Ce)
(Ce,La)[F|CO
 
3
]
12.1.9Bastnäsite-(La)
(La,Ce)[F|CO
 
3
]
12.1.10Bastnäsite-(Y)
(Y,Ce)[F|CO
 
3
]
12.1.11Parisite-(Ce)
Ca(Ce,La)
 
2
[F
 
2
|(CO
 
3
)
 
3
]
12.1.12Parisite-(Nd)
Ca(Nd,Ce,La)
 
2
[F
 
2
|(CO
 
3
)
 
3
]
12.1.13Synchysite-(Ce)
Ca(Ce,La)[F|(CO
 
3
)
 
2
]
12.1.14Synchysite-(Y)
Ca(Y,Ce)[F|(CO
 
3
)
 
2
]
12.1.15Synchysite-(Nd)
Ca(Nd,Y,Gd)[F|(CO
 
3
)
 
2
]
12.1.16Röntgenite-(Ce)
Ca
 
2
(Ce,La)
 
3
[F
 
3
|(CO
 
3
)
 
5
]
12.1.17Cordylite-(Ce)
(Na,Ca)BaCe
 
2
(CO
 
3
)
 
4
F
12.1.19Huanghoite-(Ce)
BaCe[F|(CO
 
3
)
 
2
]
12.1.20Zhonghuacerite-(Ce)
Ba
 
2
Ce[F|(CO
 
3
)
 
3
]
12.1.21Cebaite-(Ce)
Ba
 
3
Ce
 
2
[F
 
2
|(CO
 
3
)
 
5
]
12.1.22Thorbastnäsite
Th(Ca,Ce)(CO
 
3
)
 
2
F
 
2
·3H
 
2
O
12.1.23Phosgenite
Pb
 
2
[Cl
 
2
|CO
 
3
]
12.1.24Barstowite
Pb
 
4
[Cl
 
6
|CO
 
3
] · H
 
2
O
12.1.25Albrechtschraufite
Ca
 
4
Mg(UO
 
2
)
 
2
[F
 
2
|(CO
 
3
)
 
6
] · 17 H
 
2
O
12.1.26Kettnerite
(BiO)Ca[F|CO
 
3
]

Other Names for Brenkite

Synonyms:
IMA1977-036
Other Languages:
German:Brenkit
Russian:Бренкит
Spanish:Brenkita

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 Brenkite

Reference List:Hentschel, G., Leufer, U., Tillmanns, E. (1978): Brenkit, ein neues Kalzium-Fluor-Carbonat von Schellkopf/Eifel. N.Jb.Mineral., Mh, 1978, 325-329.
American Mineralogist: 64: 241-242.

Tschermaks Mineralogische und Petrographische Mitteilungen: 27: 261-266.

Internet Links for Brenkite

Search Engines:
  • Look for Brenkite on Google
  • Look for Brenkite images on Google
    • External Links:
  • Look for Brenkite on Webmineral
  • Look for Brenkite on Athena Mineralogy
  • Look for Brenkite on Wikipedia
  • Look for Brenkite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Brenkite in the Natural History Museum (London) online catalogue
  • Brenkite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • Lapis Mineral Magazin
  • Buy Minerals and Crystals from Crystalarium.com
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • rare and unusual minerals mainly crystallized
  • Search for - Brenkite - on e-Rocks Mineral Sales & Auctions
  • Top quality minerals from Kristalle of California
  • Buy minerals from Mineralium.com
  • Find Brenkite on www.crystalclassics.co.uk
  • Buy from David K Joyce minerals
  • Buy fine minerals and gemstones from Pala International
  • Fabre Minerals - search for Brenkite specimens
    • Jobs:
  • Mining & Geology Jobs

    • Page Sponsor

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

    Localities for Brenkite

    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.
    Germany
     
    • Rhineland-Palatinate
      • Eifel Mts
        • Niederzissen
          • Brenk
    		Neues Jahrb.Min.,Mh.(1978) 325-329
    USA
     
    • New Mexico
      • Colfax Co.
        • Springer
          • Point of Rocks Mesa (Pecks Mesa)
    		Rocks & Min.: 60:229.
    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: 6th Nov 2009 15:33:19