Brenkite Mineral Data

Brenkite Mineral Data
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General Brenkite Information

Help on Chemical Formula: Chemical Formula: Ca2(CO3)F2
Help on Composition: Composition: Molecular Weight = 178.16 gm
   Calcium   44.99 %  Ca   62.95 % CaO
   Carbon     6.74 %  C    24.70 % CO2
   Oxygen    26.94 %  O
   Fluorine  21.33 %  F    21.33 % F
               -   %   F    -8.98 % -O=F2    
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2(CO3)F2
Help on Environment: Environment: Voids and fissures in a porphryritic selbergite.
Help on IMA Status: IMA Status: Approved IMA 1978
Help on Locality: Locality: Schellkopf, 0.5 km west of Brenk, Eifel district, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Brenkite Say BRENKITE
Help on Synonym: Synonym: ICSD 100607
  PDF 29-322
 

Brenkite Image

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Brenkite

Comments: Spherical aggregate of colorless crystals of brenkite.
Location: Schellkopf, Brenk, Eifel Mts, Rhineland-Palatinate, Germany. Scale: Picture size 7.5 mm.
© Thomas Witzke / Abraxas-Verlag

Brenkite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.0132:1:0.8672
Help on Cell Dimensions: Cell Dimensions: a = 7.65, b = 7.55, c = 6.548, Z = 4; V = 378.20 Den(Calc)= 3.13
Help on Crystal System: Crystal System: Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: P bcn
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.794(1), 3.006(0.8), 3.028(0.8),
Click Here for Large Brenkite Structure Window Crystal Structure:

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Leufer U , Tillmanns E , Tschermaks Mineralogische und Petrographische Mitteilungen , 27 (1980) p.261-266, Die kristallstruktur von brenkit, Ca2F2CO3

 

Physical Properties of Brenkite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless.
Help on Density: Density: 3.1
Help on Diaphaneity: Diaphaneity: Transparent
Help on Streak: Streak: white
 

Optical Properties of Brenkite

Help on Optical Data: Optical Data: Biaxial (-), a=1.525, b=1.59, g=1.593, bire=0.0680, 2V(Calc)=22, 2V(Meas)=26-28.
 

Calculated Properties of Brenkite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.09 gm/cc
note: Specific Gravity of Brenkite =3.13 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0014782654
Boson Index = 0.9985217346
Help on Photoelectric: Photoelectric: PEBrenkite = 5.76 barns/electron
U=PEBrenkite x rElectron Density= 17.80 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Brenkite is Not Radioactive
 

Brenkite Classification
Help on Dana Class: Dana Class: 16a.03.06.01 (16a)Carbonates - Hydroxyl or Halogen
  (16a.03)where (A B)2 (XO3) Zq
  (16a.03.06)Dana Group
 
16a.03.06.01 Brenkite Ca2(CO3)F2 P bcn 2/m 2/m 2/m
Help on Strunz Class: Strunz Class: 05.BC.05 05 - CARBONATES (NITRATES)
  05.B - Carbonates with additional anions, without H2O
  05.BC -With alkali-earth cations
 
05.BC.05 Brenkite Ca2(CO3)F2 P bcn 2/m 2/m 2/m
 

Other Brenkite Information
Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Brenkite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Brenkite

Ca2(CO3)F2
Dana No: 16a.03.06.01 Strunz No: 05.BC.05
Locality:

 

Notes: