Zimbabweite Mineral Data

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


Crystalarium.com
[Minerals] [Gems] [Sale Items] [Gold Rings] [Big Stuff] [Main Page]
Shop early for Holiday Season and get the best stuff.
You can put it on layaway for up to six weeks!


General Zimbabweite Information

Help on Chemical Formula: Chemical Formula: Na(Pb,Na,K)2(Ta,Nb,Ti)4As+++4O18
Help on Composition: Composition: Molecular Weight = 1,498.05 gm
   Potassium   1.30 %  K     1.57 % K2O
   Sodium      2.30 %  Na    3.10 % Na2O
   Tantalum   38.65 %  Ta   47.20 % Ta2O5
   Titanium    0.96 %  Ti    1.60 % TiO2
   Niobium     3.72 %  Nb    5.32 % Nb2O5
   Arsenic    20.01 %  As   26.41 % As2O3
   Lead       13.83 %  Pb   14.37 % Pb2O
   Oxygen     19.22 %  O
             ______        ______ 
             100.00 %       99.57 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na1.5K0.5PbAs4Ta3.2Nb0.6Ti0.3O18
Help on Environment: Environment: In a kaolinized pegmatite.
Help on IMA Status: IMA Status: Approved IMA 1986
Help on Locality: Locality: St. Ann's mine, Karoi district, SE of Miami, Zimbabwe. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the country of origin.
Help on Name Pronunciation: Name Pronunciation: Zimbabweite + Pronunciation Say ZIMBABWEITE
Help on Synonym: Synonym: ICSD 202709
  PDF 39-356
 

Search for Zimbabweite Images

Click Here To Search Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.
  

Zimbabweite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.801:1:0.568
Help on Cell Dimensions: Cell Dimensions: a = 12.245, b = 15.287, c = 8.684, Z = 4; V = 1,625.55 Den(Calc)= 6.12
Help on Crystal System: Crystal System: Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Ccmb
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.195(1), 2.882(0.7), 2.99(0.7),
Click Here for Large Zimbabweite 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


Duesler E N , Chakoumakos B C , Foord E E , American Mineralogist , 73 (1988) p.1186-1190, Zimbabweite, Na(Pb,Na,K)2As4(Ta,Nb,Ti)4O18, an arsenite-tantalate with a, novel corner-linked octahedral sheet

 

Physical Properties of Zimbabweite

Help on Cleavage: Cleavage: {010} Perfect
Help on Color: Color: Yellow brown, Honey yellow.
Help on Density: Density: 6.2
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 5-5.5 - Apatite-Knife Blade
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Adamantine
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: white
 

Optical Properties of Zimbabweite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.089 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.104 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1797,KPDmeas= 0.1774,KC= 0.1629
Ncalc = 2 - 2.01
Help on Optical Data: Optical Data: Biaxial (+), a=2.1, 2V(Meas)=80. Dispersion r < v very strong.
Help on Pleochroism (x): Pleochroism (x): pale yellow brown.
Help on Pleochroism (y): Pleochroism (y): light reddish brown.
Help on Pleochroism (z): Pleochroism (z): reddish brown.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Zimbabweite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 470 nm   17.60   17.80 
   
 546 nm   17.00   17.10 
 589 nm   16.60   16.70 
 650 nm   16.20   16.50 
Calculated Relative Intensity Colors of Zimbabweite in Air
Relative
Intensity		    0%   60% 100% 120% 180% 240% 300% 360% 420% 480% 530%
R1                      
R2                      
 

Calculated Properties of Zimbabweite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.37 gm/cc
note: Specific Gravity of Zimbabweite =6.20 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEZimbabweite = 726.01 barns/electron
U=PEZimbabweite x relectron=3,898.95 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 16.29 (Gamma Ray American Petroleum Institute Units)
Concentration of Zimbabweite per GRapi unit = 6.14 (%)

Estimated Radioactivity from Zimbabweite - barely detectable

 

Zimbabweite Classification
Help on Dana Class: Dana Class: 08.07.10.01 (08)Multiple Oxides with Nb, Ta, and Ti
  (08.07)Dana Type
  (08.07.10)Dana Group
 
08.07.10.01 Zimbabweite Na(Pb,Na,K)2(Ta,Nb,Ti)4As4O18 Ccmb 2/m 2/m 2/m
Help on Strunz Class: Strunz Class: 04.JA.40 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.J - Arsenites, Antimonites, Bismuthites, Sulfites,
  04.JA -Arsenites, antimonites, bismuthites; without additional anions, without H2O
 
04.JA.40 Zimbabweite Na(Pb,Na,K)2(Ta,Nb,Ti)4As4O18 Ccmb 2/m 2/m 2/m
 

Other Zimbabweite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic3, Dana8)
Help on See Also: See Also: Links to other databases for Zimbabweite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

Search for Zimbabweite using:

Google
 
Web webmineral.com
[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Zimbabweite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

Excalibur Minerals

Exceptional Minerals

Fabre Minerals

Heliodor

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Zimbabweite Mineral Data :

Ask about Zimbabweite 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 Zimbabweite Specimen Label here :

Zimbabweite

Na(Pb,Na,K)2(Ta,Nb,Ti)4As+++4O18
Dana No: 08.07.10.01 Strunz No: 04.JA.40
Locality:

 

Notes: