Pucherite Mineral Data

Advertisment

WE BUY COLLECTIONS & SINGLE IMPORTANT SPECIMENS

General Pucherite Information

Chemical Formula:

BiVO4

Composition:

Molecular Weight = 323.92 gm

Vanadium 15.73 % V 28.07 % V₂O₅

Bismuth 64.52 % Bi 71.93 % Bi₂O₃

Oxygen 19.76 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Bi(VO₄)

Environment:

Alteration product of native bismuth associated with bismutite and beyerite. One of 3 BiVO4 polymorphs (clinobisvanite and dreyerite).

IMA Status:

Valid Species (Pre-IMA) 1871

Locality:

Oxidized portions of Bi-Ag-U-Ca veins in the Pucher shaft of the Wolfgang Mine, Schneeberg, Saxony, Germany. Link to MinDat.org Location Data.

Name Origin:

Named after its locality.

Name Pronunciation:

Pucherite + Pronunciation

Synonym:

ICSD 70118

PDF 12-293

Pucherite Image

Images:

Pucherite Schumacherite

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

Pucherite Crystallography

Axial Ratios:

a:b:c =1.0649:1:2.3758

Cell Dimensions:

a = 5.38, b = 5.052, c = 12.003, Z = 4; V = 326.24 Den(Calc)= 6.59

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pnca

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

By Intensity(I/I_o): 3.499(1), 2.702(1), 4.644(0.55),3.96(0.5), 1.934(0.4), 1.99(0.4), 2.13(0.4), 2.99(0.4), 2.7(0.1),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Qurashi M M , Barnes W H , American Mineralogist , 37 (1952) p.423-426, A preliminary structure for pucherite, BiVO4

View Additional jPOWD Structure files for Pucherite
[1] [2]

Physical Properties of Pucherite

Cleavage:

{001} Perfect

Color:

Yellow brown, Dark brown red, Pink brown, Reddish brown.

Density:

6.25

Diaphaneity:

Transparent to Opaque

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Pulverulent - Forms a loose, poorly-coherent powdery mass.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

4 - Fluorite

Luminescence:

Non-fluorescent.

Luster:

Vitreous - Adamantine

Magnetism:

Nonmagnetic

Streak:

yellow

Optical Properties of Pucherite

Gladstone-Dale:

CI meas= -0.147 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.088 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2236,KPDmeas= 0.2357,KC= 0.2055
Ncalc = 2.28 - 2.35

Optical Data:

Biaxial (-), a=2.41, b=2.5, g=2.51, bire=0.1000, 2V(Calc)=34, 2V(Meas)=19. Dispersion marked to extreme, r < v.

Pleochroism (x):

yellow brown.

Pleochroism (y):

yellow brown.

Pleochroism (z):

yellow brown.

Calculated Properties of Pucherite

Electron Density:

Bulk Density (Electron Density)=5.62 gm/cc
note: Specific Gravity of Pucherite =6.59 gm/cc.

Fermion Index:

Fermion Index = 0.0004886448
Boson Index = 0.9995113552

Photoelectric:

PE_Pucherite=1,221.91 barns/electron
U=PE_Pucherite x rElectron Density=6,861.17 barns/cc.

Radioactivity:

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

Pucherite Classification

Dana Class:

38.04.06.01 (38)Anhydrous Phosphates, etc

(38.04)A+ XO4

(38.04.06)Dana Group

38.04.06.01 Pucherite BiVO4 Pnca 2/m 2/m 2/m

Strunz Class:

08.AD.40 08 - PHOSPHATES, ARSENATES, VANADATES

08.A - Phosphates, etc. without additional anions, without H2O

08.AD -With only large cations

08.AD.40 Pucherite BiVO4 Pnca 2/m 2/m 2/m

Other Pucherite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Pucherite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - WWW-MINCRYST

Search for Pucherite using:

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

Visit our Advertisers for Pucherite :

Cape Minerals Google Search for Pucherite
Dakota Matrix Minerals Google Search for Pucherite
Excalibur Mineral Corp. Google Search for Pucherite
Exceptional Minerals Google Search for Pucherite
John Betts Fine Minerals Search for Pucherite
McDougall Minerals Google Search for Pucherite
Mineral News Website Link
Rock and Mineral Shows Google Search for Pucherite
Weinrich Minerals, Inc. Google Search for Pucherite

Ask about Pucherite 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 Pucherite Specimen Label here :

Pucherite

BiVO4
Dana No: 38.04.06.01 Strunz No: 08.AD.40
Locality:

Notes: