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Brenkite

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About BrenkiteHide

the interesting part is on the left upper zone in the rubble

Schellkopf, Brenk, Niederzissen, Rhineland-Palatinate, Germany
Formula:
Ca2(CO3)F2
Crystal System:
Orthorhombic
Name:
Named for the type locality at Brenk, Germany.
This page provides mineralogical data about Brenkite.


Classification of BrenkiteHide

Approved
Approval Year:
1977
5.BC.05

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

16a : ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
3 : (AB)2(XO3)Zq
12.1.6

12 : Carbonates with other anions
1 : Carbonates with halides

Optical Data of BrenkiteHide

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

Formula:
Ca2(CO3)F2

Crystallography of BrenkiteHide

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

Type Occurrence of BrenkiteHide

Synonyms of BrenkiteHide

Other Language Names for BrenkiteHide

German:Brenkit
Spanish:Brenkita

Common AssociatesHide

Associated Minerals Based on Photo Data:
Phillipsite4 photos of Brenkite associated with Phillipsite on mindat.org.
Polylithionite3 photos of Brenkite associated with Polylithionite on mindat.org.
Aegirine3 photos of Brenkite associated with Aegirine on mindat.org.
Zeophyllite1 photo of Brenkite associated with Zeophyllite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

5.BC.10RouvilleiteNa3(Ca,Mn,Fe)2(CO3)3FMon. 2/m : B2/b
5.BC.15PodlesnoiteBaCa2(CO3)2F2Orth. mmm (2/m 2/m 2/m) : Cmcm

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

12.1.1NorthupiteNa3Mg(CO3)2ClIso. m3 (2/m 3) : Fd3
12.1.2BarentsiteNa7Al(HCO3)2(CO3)2F4Tric.
12.1.3RouvilleiteNa3(Ca,Mn,Fe)2(CO3)3FMon. 2/m : B2/b
12.1.4ChlormagaluminiteMg4Al2(OH)12Cl2 · 3H2OHex.
12.1.5DeferniteCa6(CO3)2-x(SiO4)x(OH)7(Cl,OH)1-2x (x<0.5)Orth. mmm (2/m 2/m 2/m) : Pnma
12.1.7Stenonite(Sr,Ba,Na)2Al(CO3)F5Mon. 2/m
12.1.8Bastnäsite-(Ce)Ce(CO3)FHex. 6 m2 : P6c2
12.1.9Bastnäsite-(La)La(CO3)FHex.
12.1.10Bastnäsite-(Y)Y(CO3)FHex. 6 m2 : P62c
12.1.11Parisite-(Ce)CaCe2(CO3)3F2Mon. m : Bb
12.1.12Parisite-(Nd)Ca(Nd,Ce,La)2(CO3)3F2
12.1.13Synchysite-(Ce)CaCe(CO3)2FMon. 2/m : B2/b
12.1.14Synchysite-(Y)CaY(CO3)2FMon. 2/m : B2/b
12.1.15Synchysite-(Nd)CaNd(CO3)2F
12.1.16Röntgenite-(Ce)Ca2(Ce,La)3(CO3)5F3Trig. 3 : R3
12.1.17Cordylite-(Ce)NaBaCe2(CO3)4F Hex.
12.1.19Huanghoite-(Ce)BaCe(CO3)2FTrig. 3m (3 2/m) : R3m
12.1.20Zhonghuacerite-(Ce)Ba2Ce(CO3)3FTrig.
12.1.21Cebaite-(Ce)Ba3Ce2(CO3)5F2
12.1.22ThorbastnäsiteThCa(CO3)2F2 · 3H2O
12.1.23PhosgenitePb2CO3Cl2Tet. 4/mmm (4/m 2/m 2/m) : P4/mbm
12.1.24BarstowitePb4Cl6(CO3) · H2OMon. 2/m : P21/m
12.1.25AlbrechtschraufiteCa4Mg(UO2)2(CO3)6F2 · 17-18H2OTric. 1 : P1
12.1.26KettneriteCaBiCO3OFOrth. mmm (2/m 2/m 2/m)

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 BrenkiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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 BrenkiteHide

Localities for BrenkiteHide

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.
Germany (TL)
 
  • Rhineland-Palatinate
    • Niederzissen
      • Brenk
Neues Jahrb.Min.,Mh.(1978) 325-329
Sweden
 
  • Jämtland
Lindh, A. (2012). Minute-sized crystals of HFSE minerals in evolved, fluorite-bearing granite, an example from the Sörvik granite, central Sweden. GFF, 134(4), 283-294.
USA
 
  • New Mexico
    • Colfax Co.
      • Springer
        • Point of Rocks Mesa (Pecks Mesa)
Rocks & Min.: 60:229.
Mineral and/or Locality  
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