Mineralogy Database

Brendelite Mineral Data

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General Brendelite Information

Help on Chemical  Formula: Chemical Formula: (Bi,Pb)2Fe(PO4)(O,OH)3
Help on Composition: Composition: Molecular Weight = 616.49 gm
   Iron         9.06 %  Fe   11.65 % FeO
   Bismuth     43.05 %  Bi   48.00 % Bi2O3
   Phosphorus   5.02 %  P    11.51 % P2O5
   Hydrogen     0.16 %  H     1.46 % H2O
   Lead        24.54 %  Pb   26.43 % PbO
   Oxygen      18.17 %  O
              ______        ______ 
              100.00 %       99.05 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Bi1.27Pb0.73Fe2+O2(OH)(PO4)
Help on Environment: Environment: From the dumps of the ancient (16th century) Guldener Falk silver mine. Chemically related to paulkerrite.
Help on IMA Status: IMA Status: Approved IMA 1999 (Dana # Added)
Help on Locality: Locality: Near Schneeberg, Saxony, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Christain Friedrick Brendel (1776-1861), in recognition of his development and application of mechanized mining technology.
Help on Name Pronunciation: Name Pronunciation: Brendelite + Pronunciation Say BRENDELITE
Help on Synonym: Synonym: ICSD 54148
  IMA1997-001
 

Brendelite Image

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  Brendelite

Comments: Small brown tabular crystals of brendelite on matrix.
Location: G├╝ldener Falk Mine, Schneeberg, Erzgebirge, Sachsen, Germany. Scale: Picture size 1 mm.
© Thomas Witzke / Abraxas-Verlag

Brendelite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =3.2183:1:1.8083
Help on Cell Dimensions: Cell Dimensions: a = 12.278, b = 3.815, c = 6.899, Z = 2; beta = 111.14° V = 301.41 Den(Calc)= 6.79
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.011(1), 3.372(0.77), 2.75(0.62),
 

Physical Properties of Brendelite

Help on Cleavage: Cleavage: None
Help on Color: Color: Black, Dark brown.
Help on Density: Density: 6.83
Help on Diaphaneity: Diaphaneity: Opaque to translucent
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Crystalline - Fine - Occurs as well-formed fine sized crystals.
Help on Habit: Habit: Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Help on Hardness: Hardness: 4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Vitreous - Adamantine
Help on Streak: Streak: light brown
 

Optical Properties of Brendelite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.06 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.066 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1669,KPDmeas= 0.1659,KC= 0.1565
Ncalc = 2.06 - 2.07
Help on Optical Data: Optical Data: Biaxial (-), a=2.06, b=2.15, g=2.19, bire=0.1300
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Brendelite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   14.69   16.36 
   
 420 nm   13.98   15.66 
 440 nm   13.49   15.22 
 460 nm   13.13   14.86 
 480 nm   12.85   14.58 
 500 nm   12.73   14.48 
 520 nm   12.60   14.37 
 540 nm   12.45   14.24 
 560 nm   12.38   14.14 
 580 nm   12.28   14.04 
 600 nm   12.22   13.94 
 620 nm   12.15   13.85 
 640 nm   12.10   13.77 
 660 nm   12.06   13.69 
 680 nm   11.96   13.61 
 700 nm   12.03   13.61 
Calculated Relative Intensity Colors of Brendelite in Air
Relative
Intensity
   0%   80% 100% 160% 240% 320% 400% 480% 560% 640% 710%
R1                      
R2                      
 

Calculated Properties of Brendelite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.83 gm/cc
note: Specific Gravity of Brendelite =6.83 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.05
Boson Index = 0.95
Help on Photoelectric: Photoelectric: PEBrendelite =1,255.52 barns/electron
U=PEBrendelite x rElectron Density=7,324.08 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Brendelite is Not Radioactive
 

Brendelite Classification

Help on  Dana Class: Dana Class: 41.03.08.02 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.03)where (A B)3 (XO4) Zq
  (41.03.08)Dana Group
 
41.03.08.01 Paulkellerite Bi2Fe(PO4)O2(OH)2 C 2/c 2/m
 
41.03.08.02 Brendelite! (Bi,Pb)2Fe(PO4)(O,OH)3 C 2/m 2/m
Help on  Strunz Class: Strunz Class: 08.BM.15 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BM -With medium-sized and large cations, (OH, etc.):RO4 = 4:1
 
08.BM.15 Brendelite! (Bi,Pb)2Fe(PO4)(O,OH)3 C 2/m 2/m
 

Other Brendelite Information

Help on References: References: NAME( AmMin, Vol. 84, No. 7-8) PHYS. PROP.(Eur. J. Min.,Vol.10,1998) OPTIC PROP.(AntBidBlaNic4)
Help on See Also: See Also: Links to other databases for Brendelite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Brendelite

(Bi,Pb)2Fe(PO4)(O,OH)3
Dana No: 41.03.08.02 Strunz No: 08.BM.15
Locality:

 

Notes:

 

 
   
 


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