Volborthite Mineral Data

General Volborthite Information

Chemical Formula:

Cu++3V+++++2O7(OH)2•2(H2O)

Composition:

Molecular Weight = 474.56 gm

Vanadium 21.47 % V 38.33 % V₂O₅

Copper 40.17 % Cu 50.29 % CuO

Hydrogen 1.27 % H 11.39 % H₂O

Oxygen 37.09 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Cu₃V⁵⁺₂O₇(OH)₂•2(H₂O)

Environment:

Secondary mineral associated with U-V Colorado Plateau type deposits.

IMA Status:

Valid Species (Pre-IMA) 1838

Locality:

Syssersk and Nizhne Taglisk, Ural Mountains, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for Alexander von Volborth (1800-1876), Russian paleontologist who first noted the mineral.

Name Pronunciation:

Volborthite + Pronunciation

Synonym:

ICSD 63282

PDF 46-1443

Volborthite Image

Images:

Volborthite Vashegyite

Comments: Small bluish-white crystals of vashegyite with green volborthite.
Location: Jeremias GlÃ¼ck Mine (Fairy Grotto), Garnsdorf, Saalfeld, Thuringia, Germany. Scale: Picture size 1.8 mm.
© Thomas Witzke / Abraxas-Verlag

Images:

Volborthite

Comments: Shale with a heavy coating of brilliant green, scaly crystals of volborthite.
Location: Monument #1 Mine, Apache County, Arizona. Scale: 6.5 x 5.5 cm.
© John Veevaert

Volborthite Crystallography

Axial Ratios:

a:b:c =1.8052:1:1.2279

Cell Dimensions:

a = 10.604, b = 5.874, c = 7.213, Z = 2; beta = 94.9° V = 447.64 Den(Calc)= 3.52

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m

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

By Intensity(I/I_o): 7.26(1), 2.56(0.8), 2.87(0.8),

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

Lafontaine M A , LeBail A , Ferey G , Journal of Solid State Chemistry , 85 (1990) p.220-227, Copper-containing minerals - I. Cu3V2O7(OH)2,2H2O: The synthetic homolog

View Additional jPOWD Structure files for Volborthite
[1]

Physical Properties of Volborthite

Cleavage:

{???} Perfect

Color:

Brownish yellow, Greenish yellow, Yellow, Yellow green, Light brown.

Density:

3.5

Diaphaneity:

Translucent to Subtranslucent

Habit:

Globular - Spherical, or nearly so, rounded forms (e.g. wavellite).

Habit:

Scaly - Morphology like fish scales.

Hardness:

3 - Calcite

Luminescence:

Non-fluorescent.

Luster:

Vitreous - Pearly

Magnetism:

Nonmagnetic

Streak:

light green

Optical Properties of Volborthite

Gladstone-Dale:

CI meas= -0.167 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.161 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2955,KPDmeas= 0.2971,KC= 0.2545
Ncalc = 1.89 - 1.9

Optical Data:

Biaxial (-), a=2.01, b=2.04, g=2.07, bire=0.0600

Calculated Properties of Volborthite

Electron Density:

Bulk Density (Electron Density)=3.37 gm/cc
note: Specific Gravity of Volborthite =3.52 gm/cc.

Fermion Index:

Fermion Index = 0.0007166428
Boson Index = 0.9992833572

Photoelectric:

PE_Volborthite= 21.84 barns/electron
U=PE_Volborthite x rElectron Density= 73.55 barns/cc.

Radioactivity:

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

Volborthite Classification

Dana Class:

40.03.10.01 (40)Hydrated Phosphates, etc

(40.03)where (A++)3 (XO4)2 · x(H2O)

(40.03.10)Dana Group

40.03.10.01 Volborthite Cu3V2O7(OH)2•2(H2O) C 2/m 2/m

40.03.10.02 Martyite! Zn3V2O7(OH)2•2H2O P 3m1 3 2/m

Strunz Class:

08.FD.05 08 - PHOSPHATES, ARSENATES, VANADATES

08.F - Polyphosphates, Polyarsenates, [4]-Polyvanadates

08.FD -Polyphosphates, etc, with OH and H2O

08.FD.05 Volborthite Cu3V2O7(OH)2•2(H2O) C 2/m 2/m

08.FD.05 Martyite! Zn3V2O7(OH)2•2H2O P 3m1 3 2/m

Other Volborthite Information

References:

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

See Also:

Links to other databases for Volborthite :
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 Volborthite using:

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

Visit our Advertisers for Volborthite :

A Bijoux Google Search for Volborthite
Adam's Minerals Google Search for Volborthite
Cape Minerals Google Search for Volborthite
Dakota Matrix Minerals Google Search for Volborthite
Excalibur Mineral Corp. Google Search for Volborthite
Exceptional Minerals Google Search for Volborthite
John Betts Fine Minerals Search for Volborthite
McDougall Minerals Google Search for Volborthite
Mineral News Website Link
Rock and Mineral Shows Google Search for Volborthite
Weinrich Minerals, Inc. Google Search for Volborthite

Ask about Volborthite 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 Volborthite Specimen Label here :

Volborthite

Cu++3V+++++2O7(OH)2•2(H2O)
Dana No: 40.03.10.01 Strunz No: 08.FD.05
Locality:

Notes: