Descloizite Mineral Data

Descloizite Mineral Data
Search Webmineral :
   
Home Crystal jmol jPOWD Chem X Ray Dana Strunz Properties A to Z Images       News Help About



[Content and History] [Recent Issues] [Back Issues] [Subscriptions] [Contacts]
See Also: [Diamond Crystals] [Excalibur Minerals] [Hudson Institute] [Minerals on CDROM]
Mineral News was founded some twenty years ago and has developed a following of
avid mineral collectors seeking timely information about new finds and other items
of interest to the collector community. Articles are solicited from collector and scientific authors.


General Descloizite Information

Help on Chemical Formula: Chemical Formula: PbZn(VO4)(OH)
Help on Composition: Composition: Molecular Weight = 404.54 gm
   Vanadium  12.59 %  V    22.48 % V2O5
   Zinc      16.16 %  Zn   20.12 % ZnO
   Hydrogen   0.25 %  H     2.23 % H2O
   Lead      51.22 %  Pb   55.17 % PbO
   Oxygen    19.77 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: PbZn(VO4)(OH)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1854
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the French mineralogist, Alfred Des Closzeaux (1817-1897).
Help on Name Pronunciation: Name Pronunciation: Descloizite + Pronunciation Say DESCLOIZITE
 

Descloizite Image

Click Here for Larger Descloizite Image in a New Browser Window Images:
Click Here for Larger Descloizite Image

Descloizite

Comments: Dark reddish brown, crystalline aggregate of descloizite.
Location: Grootfontein. Namibia. Scale: 3 cm.
© Fabre Minerals

Descloizite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.8053:1:0.643
Help on Cell Dimensions: Cell Dimensions: a = 7.607, b = 9.446, c = 6.074, Z = 4; V = 436.45 Den(Calc)= 6.16
Help on Crystal System: Crystal System: Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pnam
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.23(1), 2.9(0.8), 5.12(0.8),
Help on Forms: Forms:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize
Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu
Help on Above

Forms: ( 2 1 0) ( 1 0 2) ( 0 1 1) ( 0 3 1) ( 1 1 1) ( 1 0 0) ( 0 0 1)

Warning: this large pop-up is very compute intensive and may not work well with some computers.
Click Here for Large Descloizite Structure Window 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 , The Canadian Mineralogist , 8 (1964) p.23-39, The structures of the minerals of the descloizite and adelite groups:, V - descloizite and conichalcite (part 3). The structure of descloizite

 

Physical Properties of Descloizite

Help on Cleavage: Cleavage: None
Help on Color: Color: Dark brownish black, Dark reddish brown, Orange red, Reddish brown, Black.
Help on Density: Density: 6.1 - 6.2, Average = 6.15
Help on Diaphaneity: Diaphaneity: Transparent to Opaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Habit: Habit: Plumose - "Mica-like" minerals forming aggregates of plume-like forms.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Greasy (Oily)
Help on Streak: Streak: light brownish green
 

Optical Properties of Descloizite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.089 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.087 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2056,KPDmeas= 0.206,KC= 0.1892
Ncalc = 2.15 - 2.17
Help on Optical Data: Optical Data: Biaxial (-), a=2.185, b=2.265, g=2.35, bire=0.1650, 2V(Calc)=88, 2V(Meas)=85-90. Dispersion relatively strong.
 

Calculated Properties of Descloizite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.36 gm/cc
note: Specific Gravity of Descloizite =6.16 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.12
Boson Index = 0.88
Help on Photoelectric: Photoelectric: PEDescloizite = 915.15 barns/electron
U=PEDescloizite x rElectron Density=4,905.24 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Descloizite is Not Radioactive
 

Descloizite Classification
Help on Dana Class: Dana Class: 41.05.02.01 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.05)where (A B)2 (XO4) Zq
  (41.05.02)Descloizite Group
 
41.05.02.01 Descloizite PbZn(VO4)(OH) Pnam 2/m 2/m 2/m
 
41.05.02.02 Mottramite PbCu(VO4)(OH) Pnam 2/m 2/m 2/m
 
41.05.02.03 Pyrobelonite PbMn(VO4)(OH) Pnam 2/m 2/m 2/m
 
41.05.02.04 Cechite Pb(Fe,Mn)(VO4)(OH) Pnam 2/m 2/m 2/m
 
41.05.02.05 Duftite-alpha PbCu(AsO4)(OH) P 212121 2 2 2
Help on Strunz Class: Strunz Class: 08.BH.40 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BH -With medium-sized and large cations, (OH,etc.):RO4 = 1:1
 
08.BH.40 Descloizite PbZn(VO4)(OH) Pnam 2/m 2/m 2/m
 
08.BH.40 Cechite Pb(Fe,Mn)(VO4)(OH) Pnam 2/m 2/m 2/m
 
08.BH.40 Duhamelite? Pb2Cu4Bi(VO4)4(OH)3•8(H2O) Unk Ortho
 
08.BH.40 Pyrobelonite PbMn(VO4)(OH) Pnam 2/m 2/m 2/m
 
08.BH.40 Mottramite PbCu(VO4)(OH) Pnam 2/m 2/m 2/m
 

Other Descloizite Information
Help on References: References: NAME( Sinkankas66) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Sinkankas66)
Help on See Also: See Also: Links to other databases for Descloizite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - Franklin Minerals(Dunn)
7 - Franklin Minerals(Palache)
8 - GeoScienceWorld
9 - Glendale Community College
10 - Google Images
11 - Google Scholar
12 - Handbook of Mineralogy (MinSocAm)
13 - MinDAT
14 - Mineralienatlas (Deutsch)
15 - Online Mineral Museum
16 - QUT Mineral Atlas
17 - Ruff.Info
18 - WWW-MINCRYST

Search for Descloizite using:

Google
 
Web webmineral.com
[ALTAVISTA] [AOL] [bing] [GeoScienceWorld] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Descloizite :

B & L Fine Minerals

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Excalibur Minerals

Exceptional Minerals

Fabre Minerals

John Betts Fine Minerals

Lapis Mineral Journal

Mineral News

UV Tools

Wrights Rock Shop

Translate Descloizite Mineral Data :

Ask about Descloizite 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 Espaņol

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

Descloizite

PbZn(VO4)(OH)
Dana No: 41.05.02.01 Strunz No: 08.BH.40
Locality:

 

Notes: