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Schumacherite Mineral Data

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General Schumacherite Information

Help on Chemical  Formula: Chemical Formula: Bi3[(V,As,P)O4]2O(OH)
Help on Composition: Composition: Molecular Weight = 900.22 gm
   Vanadium     6.79 %  V    12.12 % V2O5
   Bismuth     69.64 %  Bi   77.64 % Bi2O3
   Arsenic      4.99 %  As    7.66 % As2O5
   Phosphorus   0.69 %  P     1.58 % P2O5
   Hydrogen     0.11 %  H     1.00 % H2O
   Oxygen      17.77 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Bi3(VO4)1.2(AsO4)0.6(PO4)0.2O(OH)
Help on Environment: Environment: Probable series with preisingerite.
Help on IMA Status: IMA Status: Approved IMA 1983
Help on Locality: Locality: Schneeberg, Germany Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Friedrich Schumacher, professor, University of Freiberg and Bonn, Germany
Help on Name Pronunciation: Name Pronunciation: Schumacherite + Pronunciation Say SCHUMACHERITE
 

Schumacherite Image

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  Schumacherite   Pucherite

Comments: Brown crystals of pucherite with yellow schumacherite on matrix.
Location: Pucher Shaft, Schneeberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Schumacherite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.3471:1:0.9249
Help on Cell Dimensions: Cell Dimensions: a = 10.05, b = 7.46, c = 6.9, Z = 2; alpha = 87.7°, beta = 115.3°, gamma = 111.5° V = 434.80 Den(Calc)= 6.88
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.28(1), 3.09(0.8), 3.19(0.8),
 

Physical Properties of Schumacherite

Help on Cleavage: Cleavage: None
Help on Color: Color: Yellow, Yellow brown.
Help on Density: Density: 6.9
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Adamantine
Help on Streak: Streak: light yellow
 

Optical Properties of Schumacherite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.038 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.032 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1844,KPDmeas= 0.1855,KC= 0.1787
Ncalc = 2.23 - 2.24
Help on Optical Data: Optical Data: Biaxial (+), a=2.2, g=2.3-2.42, bire=0.1000-0.2200, 2V(Meas)=~90.
 

Calculated Properties of Schumacherite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.87 gm/cc
note: Specific Gravity of Schumacherite =6.94 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.000255937
Boson Index = 0.999744063
Help on Photoelectric: Photoelectric: PESchumacherite =1,331.50 barns/electron
U=PESchumacherite x rElectron Density=7,809.47 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Schumacherite is Not Radioactive
 

Schumacherite Classification

Help on  Dana Class: Dana Class: 41.10.09.02 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.10)where (A++ B++)3 (XO4)2 Zq
  (41.10.09)Preisingerite Group
 
41.10.09.01 Preisingerite Bi3(AsO4)2O(OH) P1 1
 
41.10.09.02 Schumacherite Bi3[(V,As,P)O4]2O(OH) P1 1
Help on  Strunz Class: Strunz Class: 08.BO.10 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BO -With only large cations, (OH, etc.):RO4 � 1:1
 
08.BO.10 Preisingerite Bi3(AsO4)2O(OH) P1 1
 
08.BO.10 Petitjeanite Bi3(PO4)2O(OH) P1 1
 
08.BO.10 Schumacherite Bi3[(V,As,P)O4]2O(OH) P1 1
 

Other Schumacherite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Schumacherite :
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

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Schumacherite

Bi3[(V,As,P)O4]2O(OH)
Dana No: 41.10.09.02 Strunz No: 08.BO.10
Locality:

 

Notes:

 

 
   
 


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