Lewisite Mineral Data

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


Desert Winds Gems and Minerals
[Mineral Galleries] [About Me] [e-Bay Items] [Latest News] [How to Order]
A Diverse Selection of Beautifully Unique Gem & Mineral Specimens
Desert Winds Gems & Minerals • For All Levels of Collectors Worldwide
Aesthetic & Rare Mineral Specimens • Regular Updates


General Lewisite Information

Help on Chemical Formula: Chemical Formula: (Ca,Fe++,Na)2(Sb,Ti)2O7
Help on Composition: Composition: Molecular Weight = 426.94 gm
   Sodium      0.81 %  Na    1.09 % Na2O
   Calcium    12.20 %  Ca   17.08 % CaO
   Titanium    2.24 %  Ti    3.74 % TiO2
   Manganese   0.64 %  Mn    0.83 % MnO
   Iron        6.54 %  Fe    8.41 % FeO
   Antimony   51.33 %  Sb   68.19 % Sb2O5
   Oxygen     26.23 %  O
             ______        ______ 
             100.00 %       99.34 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca1.3Fe2+0.5Na0.15Mn2+0.05Sb1.8Ti0.2O7
Help on Environment: Environment: An alteration of large tetrahedrite crystals and in eluvial sands. Lewisite (1899) is now considered Ti-bearing romeite.
Help on IMA Status: IMA Status: Discredited IMA 2006 (Dana # Added)
Help on Locality: Locality: Tripuhy cinnabar mine, Ouro Preto, Minas Gerais, Barzil. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Willam James Lewis (1847-1926), Professor of Mineralogy, Cambridge University, Canbridge, England.
Help on Name Pronunciation: Name Pronunciation: Lewisite Say LEWISITE
 

Search for Lewisite 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.
  

Lewisite Crystallography
Help on Cell Dimensions: Cell Dimensions: a = 10.64, Z = 8; V = 1,204.55 Den(Calc)= 4.71
Help on Crystal System: Crystal System: Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F d3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.548(1), 1.813(1), 2.94(1),0.989(0.5), 1.05(0.5), 1.15(0.5), 1.179(0.5),
Click Here for Large Lewisite 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


Rouse R C , Dunn P J , Peacor D R , Wang L , Journal of Solid State Chemistry , 141 (1998) p.562-569, Structural studies of the natural antimonian pyrochlores I. Mixed valency,, cation site splitting, and symmetry reduction in lewisite, Locality: cinnabar mine, Tripuhy, Ouro Preto, Minas Gerias, Brazil, Sample: F23 refinement

 

Physical Properties of Lewisite

Help on Cleavage: Cleavage: {111} Imperfect, {111} Imperfect, {111} Imperfect
Help on Color: Color: Honey yellow, Amber yellow, Yellowish brown.
Help on Density: Density: 4.95
Help on Diaphaneity: Diaphaneity: Transparent to Subopaque
Help on Fracture: Fracture: Hackly - Jagged, torn surfaces, (e.g. fractured metals).
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Habit: Habit: Pulverulent - Forms a loose, poorly-coherent powdery mass.
Help on Hardness: Hardness: 5.5 - Knife Blade
Help on Luster: Luster: Vitreous - Resinous
Help on Streak: Streak: light yellowish brown
 

Optical Properties of Lewisite

Help on Optical Data: Optical Data: Isotropic.
  NCalc= 1.82 - from Gladstone-Dale relationship (KC = 0.1744) where Ncalc=Dcalc*KC+1
NCalc= 1.86 - from Gladstone-Dale relationship (KC = 0.1744) where Ncalc=Dmeas*KC+1
 

Calculated Properties of Lewisite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.28 gm/cc
note: Specific Gravity of Lewisite =4.71 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0045773186
Boson Index = 0.9954226814
Help on Photoelectric: Photoelectric: PELewisite = 170.36 barns/electron
U=PELewisite x rElectron Density= 729.57 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Lewisite is Not Radioactive
 

Lewisite Classification
Help on Dana Class: Dana Class: 44.01.01.03a (44)Antimonates
  (44.01)(A)2 (X2 O6) (O,OH,F)
  (44.01.01)Stibiconite Group
 
44.01.01.01 Stibiconite SbSb2O6(OH) F d3m 4/m 3 2/m
 
44.01.01.02 Bindheimite Pb2Sb2O6(O,OH) F d3m 4/m 3 2/m
 
44.01.01.03 Romeite (Ca,Fe,Mn,Na)2(Sb,Ti)2O6(O,OH,F) F d3m 4/m 3 2/m
 
44.01.01.03a Lewisite? (Ca,Fe,Na)2(Sb,Ti)2O7 F d3m 4/m 3 2/m
 
44.01.01.04 Monimolite (Pb,Ca)2Sb2O7 F d3m 4/m 3 2/m
 
44.01.01.05 Stetefeldtite Ag2Sb2O6(O,OH) F d3m 4/m 3 2/m
 
44.01.01.06 Bismutostibiconite Bi(Sb,Fe)2O7 F d3m 4/m 3 2/m
 
44.01.01.07 Partzite Cu2Sb2(O,OH)7(?) F d3m 4/m 3 2/m
Help on Strunz Class: Strunz Class: 08.XX.00 08 - PHOSPHATES, ARSENATES, VANADATES
  08.X - Unclassified Strunz PHOSPHATES, ARSENATES, VANADATES
  08.XX -Stibiconite Group
 
08.XX.00 Arsenobismite? Bi2(AsO4)(OH)3 Unk Ortho
 
08.XX.00 Coeruleolactite (Ca,Cu)Al6(PO4)4(OH)8•4-5(H2O) P1 1
 
08.XX.00 Cheralite-(Ce)? (Ce,Ca,Th)(P,Si)O4 P 21/n 2/m
 
08.XX.00 Chernovite-(Ce)* (Ce,Y)(AsO4) I 41/amd 4/m 2/m 2/m
 
08.XX.00 Kerstenite? PbSeO4(?) P nma 2/m 2/m 2/m
 
08.XX.00 Laubmannite? Fe3Fe6(PO4)4(OH)12 Unk Ortho
 
08.XX.00 Spodiosite? Ca2(PO4)F Pbcm 2/m 2/m 2/m
 
08.XX.00 Pseudo-autunite* (H3O)4Ca2(UO2)2(PO4)4•5(H2O)(?) Unk Ortho
 
08.XX.00 Viseite Ca10Al24(SiO4)6(PO4)7O22F3•72(H2O)(?) I a3d 4/m 3 2/m
 
08.XX.00 Vanuranylite? (H3O,Ba,Ca,K)1.6(UO2)2V2O8•4(H2O)(?) C 2/c ? 2/m
 
08.XX.00 Sodium-autunite Na2(UO2)2(PO4)2•8(H2O) P 4/nmm 4/m 2/m 2/m
 
08.XX.00 Sodium meta-autunite! Na2(UO2)2(PO4)2•6-8(H2O) P 4/nmm 4/m 2/m 2/m
 
08.XX.00 Slavkovite! Cu13(AsO4)6(AsO3OH)4•23(H2O) P1 1
 
08.XX.00 IMA2000-020! Fe4[AsO3OH]5[AsO2(OH)2]2•20(H2O) Ortho Ortho
 
08.XX.00 Lewisite! (Ca,Fe,Na)2(Sb,Ti)2O7 F d3m 4/m 3 2/m
 
08.XX.00 Kamarizaite! Fe3(AsO4)2(OH)3•3H2O Pccm, Pcc2, Pcmm, Pcm21 Ortho
 
08.XX.00 Lapeyreite! Cu3O[AsO3(OH)]2•H2O C 2/m 2/m
 
08.XX.00 IMA2008-063 Pb[Zn0.25,[]0.75]Fe3H(AsO4)2(OH)6 C 2/c 2/m
 
08.XX.00 IMA2009-002! Cu3(AsO4)2 P 21/c 2/m
 
08.XX.00 IMA2009-005 (Y,Ca,REE)5[(Si,P)O4]3F P 63/m 6/m 2/m 2/m
 
08.XX.00 IMA2009-016 Cu4H(AsO4)2(OH)3•H2O P1 1
 

Other Lewisite Information
Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(AntBidBlaNic3) OPTIC PROP.(AntBidBlaNic3)
Help on See Also: See Also: Links to other databases for Lewisite :
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

Search for Lewisite using:

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

Visit our Advertisers for Lewisite :

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 Lewisite Mineral Data :

Ask about Lewisite 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 Lewisite Specimen Label here :

Lewisite

(Ca,Fe++,Na)2(Sb,Ti)2O7
Dana No: 44.01.01.03a Strunz No: 08.XX.00
Locality:

 

Notes: