Schumacherite Mineral Data

Advertisment

McDougall Minerals is based near famous Bancroft, Ontario, at the heart of one of the best mineral regions in Canada

General Schumacherite Information

Chemical Formula:

Bi3[(V,As,P)O4]2O(OH)

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

Empirical Formula:

Bi₃(VO₄)_1.2(AsO₄)_0.6(PO₄)_0.2O(OH)

Environment:

Probable series with preisingerite.

IMA Status:

Approved IMA 1983

Locality:

Schneeberg, Germany Link to MinDat.org Location Data.

Name Origin:

Named for Friedrich Schumacher, professor, University of Freiberg and Bonn, Germany

Name Pronunciation:

Schumacherite + Pronunciation

Schumacherite Image

Images:

Click Here for Larger Schumacherite Image

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

Axial Ratios:

a:b:c =1.3471:1:0.9249

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

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.28(1), 3.09(0.8), 3.19(0.8),

Physical Properties of Schumacherite

Cleavage:

None

Color:

Yellow, Yellow brown.

Density:

6.9

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

3 - Calcite

Luster:

Adamantine

Streak:

light yellow

Optical Properties of Schumacherite

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

Optical Data:

Biaxial (+), a=2.2, g=2.3-2.42, bire=0.1000-0.2200, 2V(Meas)=~90.

Calculated Properties of Schumacherite

Electron Density:

Bulk Density (Electron Density)=5.87 gm/cc
note: Specific Gravity of Schumacherite =6.94 gm/cc.

Fermion Index:

Fermion Index = 0.000255937
Boson Index = 0.999744063

Photoelectric:

PE_{Schumacherite}=1,331.50 barns/electron
U=PE_{Schumacherite} x rElectron Density=7,809.47 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Schumacherite is Not Radioactive

Schumacherite Classification

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

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 ³ 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

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)

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

Search for Schumacherite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Schumacherite :

Dakota Matrix Minerals Google Search for Schumacherite
John Betts Fine Minerals Search for Schumacherite
McDougall Minerals Google Search for Schumacherite
Rock and Mineral Shows Google Search for Schumacherite
Weinrich Minerals, Inc. Google Search for Schumacherite

Ask about Schumacherite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Schumacherite

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

Notes: