Britvinite Mineral Data

Britvinite Mineral Data
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General Britvinite Information

Help on Chemical Formula: Chemical Formula: Pb7+xMg4.5[(Si,Al)5O14](BO3)(BO3,AsO4)(CO3)(OH,O)7 ( x < 0.5)
Help on Composition: Composition: Molecular Weight = 4,587.29 gm
   Magnesium   4.78 %  Mg    7.93 % MgO
   Aluminum    0.22 %  Al    0.41 % Al2O3
   Silicon     5.96 %  Si   12.74 % SiO2
   Boron       0.83 %  B     2.66 % B2O3
   Hydrogen    0.26 %  H     2.30 % H2O
   Lead       66.62 %  Pb   71.77 % PbO
   Carbon      0.57 %  C     2.09 % CO2
   Oxygen     20.76 %  O
             ______        ______ 
             100.00 %       99.91 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb14.75Mg9.03Si9.73Al0.37O30.76(BO3)3.51(CO3)2.18(OH)11.7
Help on Environment: Environment: Layer silicate
Help on IMA Status: IMA Status: Approved IMA 2006 (Dana # Added)
Help on Locality: Locality: Långban deposit, Bergslagen ore region, Filipstad district, Värmland, Sweden Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Sergei Nikolaevich Britvin (b. 1965), a Russian mineralogist.
Help on Synonym: Synonym: IMA2006-031
 

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Britvinite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.9979:1:2.0121
Help on Cell Dimensions: Cell Dimensions: a = 9.3409, b = 9.3597, c = 18.8333, Z = 1; alpha = 80.365°, beta = 75.816°, gamma = 59.87° V = 1,361.20 Den(Calc)= 5.60
Help on Crystal System: Crystal System: Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 18.1(1), 3.02(0.9), 2.698(0.7),1.519(0.4), 1.766(0.4), 1.867(0.3), 2.275(0.3), 3.39(0.3),
Click Here for Large Britvinite Structure Window Crystal Structure:

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Yakubovich O V , Massa W , Chukanov N V , Crystallography Reports , 53 (2008) p.206-215, Crystal structure of britvinite [Pb7(OH)3F(BO3)2(CO3)][Mg4.5(OH)3(Si5O14)]:, A new layered silicate with an original type of silicon-oxygen networks, Locality: Varmland, Sweden

 

Physical Properties of Britvinite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Pale yellow, Colorless.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Sectile - Brittle fracture with slightly sectile shavings possible.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Adamantine
Help on Streak: Streak: white
 

Optical Properties of Britvinite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= -0.042 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1632,KC= 0.1566
Ncalc = 1.86
Help on Optical Data: Optical Data: Biaxial (+/-), a=1.896, b=1.903, g=1.903, bire=0.0070, 2V(Calc)=0, 2V(Meas)=20. Dispersion strong, r < v.
 

Calculated Properties of Britvinite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.76 gm/cc
note: Specific Gravity of Britvinite =5.52 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.15
Boson Index = 0.85
Help on Photoelectric: Photoelectric: PEBritvinite =1,186.68 barns/electron
U=PEBritvinite x rElectron Density=5,647.46 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Britvinite is Not Radioactive
 

Britvinite Classification
Help on Dana Class: Dana Class: 71.05.03.01 (71)Phyllosilicate Sheets of Six-Membered Rings
  (71.05)with other anions
  (71.05.03)Dana Group
 
71.05.03.01 Britvinite! Pb7xMg4.5[(Si,Al)5O14](BO3)(BO3,AsO4)(CO3)(OH,O)7(x<0.5) P1 1
Help on Strunz Class: Strunz Class: 09.EG.70 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.EG -Double nets with 6-membered and larger rings
 
09.EG.70 Britvinite! Pb7xMg4.5[(Si,Al)5O14](BO3)(BO3,AsO4)(CO3)(OH,O)7(x<0.5) P1 1
 

Other Britvinite Information
Help on References: References: NAME( Geology of Ore Deposits, v50:713) PHYS. PROP.(Geology of Ore Deposits, v50:713) OPTIC PROP.(Geology of Ore Deposits, v50:713)
Help on See Also: See Also: Links to other databases for Britvinite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Print or Cut-and-Paste your Britvinite Specimen Label here :

Britvinite

Pb7+xMg4.5[(Si,Al)5O14](BO3)(BO3,AsO4)(CO3)(OH,O)7 ( x < 0.5)
Dana No: 71.05.03.01 Strunz No: 09.EG.70
Locality:

 

Notes: