Cassiterite Mineral Data + Say CASSITERITE

General Cassiterite Information
Help on Chemical Formula: Chemical Formula: SnO2
Help on Composition: Composition: Molecular Weight = 150.71 gm
   Tin     78.77 %  Sn  100.00 % SnO2
   Oxygen  21.23 %  O
          ______        ______ 
          100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: SnO2
Help on Environment: Environment: Granite pegmatites and alluvial placer deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1832
Help on Locality: Locality: Cornwall, Wales, Great Britain. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek kassiteros - "tin."
Help on Synonym: Synonym: ICSD 39173
  PDF 41-1445
  Staringite-mixture with ferrotapiolite
  Tin Ore
  Wood Tin
 

Cassiterite Image

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Cassiterite

Comments: Very brilliant black crystals of cassiterite on white mica.
Location: Xue Bao Diang, Sichuan, China. Scale: Size Not Given.
© Fabre Minerals
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Cassiterite

Comments: Gemmy, doubly terminated cassiterite on quartz-mica matrix.
Location: Langcangjiang river area, Yunnan, China. Scale: 2.7 x 2.2 x 1.8 cm.
© Fabre Minerals

Cassiterite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:0.65808
Help on Cell Dimensions: Cell Dimensions: a = 4.738, c = 3.118, Z = 2; V = 69.99 Den(Calc)= 7.15
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: P 4/mnm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.351(1), 2.644(0.81), 1.765(0.63),
Help on Forms: Forms:

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Forms: [ 1 1 0] [ 1 1 1] [ 1 0 0] [ 1 0 1]

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Baur W H , Acta Crystallographica , 9 (1956) p.515-520, Uber die verfeinerung der kristallstrukturbestimmung einiger vertreter, des rutiltyps: TiO2, SnO2, GeO2 und MgF2

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

Physical Properties of Cassiterite

Help on Cleavage: Cleavage: [100] Perfect, [110] Indistinct
Help on Color: Color: Brown, Brownish black, Colorless, Green, Gray.
Help on Density: Density: 6.8 - 7, Average = 6.9
Help on Diaphaniety: Diaphaniety: Transparent to translucent to opaque
Help on Fracture: Fracture: Irregular - Flat surfaces (not cleavage) fractured in an irregular pattern.
Help on Habit: Habit: Botryoidal - "Grape-like" rounded forms (e.g.. malachite).
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 6-7 - Orthoclase-Quartz
Help on Luminescence: Luminescence: None.
Help on Luster: Luster: Adamantine
Help on Streak: Streak: brownish white
 

Optical Properties of Cassiterite

Help on Dichroism (e): Dichroism (e): yellow.
Help on Dichroism (w): Dichroism (w): red brown.
Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.062 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.025 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1466,KPDmeas= 0.1519,KC= 0.143
Help on Optical Data: Optical Data: Uniaxial (+), w=1.99-2.01, e=2.093-2.1, bire=0.0900-0.1030.
Help on RL Anisotrophism: RL Anisotrophism: Strong.
Help on RL Color: RL Color: Light gray with white to brownish internal reflections.
Help on RL Pleochroism: RL Pleochroism: Strong to very weak.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Cassiterite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   11.70   13.20 
   
 420 nm   11.60   13.00 
 440 nm   11.50   12.80 
 460 nm   11.40   12.60 
 480 nm   11.30   12.50 
 500 nm   11.20   12.40 
 520 nm   11.00   12.20 
 540 nm   11.00   12.10 
 560 nm   10.90   12.00 
 580 nm   10.90   12.00 
 600 nm   10.80   12.00 
 620 nm   10.80   12.00 
 640 nm   10.70   12.00 
 660 nm   10.70   12.00 
 680 nm   10.60   12.00 
 700 nm   10.60   12.00 
Calculated Relative Intensity Colors of Cassiterite in Air
Relative
Intensity		    0%   90% 100% 180% 270% 360% 450% 540% 630% 720% 810%
R1                      
R2                      
 

Calculated Properties of Cassiterite

Help on Electron Density: Electron Density:

relectron=6.26 gm/cc
note: rCassiterite =7.15 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.13101
Boson Index = 0.86899
Help on Photoelectric: Photoelectric:

PECassiterite = 247.66 barns/electron
U=PECassiterite x relectron=1,550.92 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Cassiterite is Not Radioactive
 

Cassiterite Classification
Help on Dana Class: Dana Class: 4.4.1.5 (4)Simple Oxides
  (4.4)with a cation charge of 4+ (A++++ O2)
  (4.4.1)Rutile group (Tetragonal: P4/mnm)
 
4.4.1.1 Rutile TiO2 P 4/mnm 4/m 2/m 2/m
 
4.4.1.2 Ilmenorutile (Ti,Nb,Fe)O2 P 4/mnm 4/m 2/m 2/m
 
4.4.1.3 Struverite (Ti,Ta,Fe)O2 P 4/mnm 4/m 2/m 2/m
 
4.4.1.4 Pyrolusite MnO2 P 4/mnm 4/m 2/m 2/m
 
4.4.1.5 Cassiterite SnO2 P 4/mnm 4/m 2/m 2/m
 
4.4.1.6 Plattnerite PbO2 P 4/mnm 4/m 2/m 2/m
 
4.4.1.7 Argutite GeO2 P 4/mnm 4/m 2/m 2/m
 
4.4.1.8 Squawcreekite? (Fe,Sb,W)O4·(H2O) P 4/mnm 4/m 2/m 2/m
 
4.4.1.9 Stishovite SiO2 P 4/mnm 4/m 2/m 2/m
Help on Strunz Class: Strunz Class: IV/D.02-40 IV - Oxides
  IV/D - Oxides with metal : oxygen = 1:2 (MO2 and related compounds)
  IV/D.02 - Rutile group, Rutile - Cassiterite - Platnerite series
 
IV/D.02-10 Rutile TiO2 P 4/mnm 4/m 2/m 2/m
 
IV/D.02-20 Pyrolusite MnO2 P 4/mnm 4/m 2/m 2/m
 
IV/D.02-30 Squawcreekite? (Fe,Sb,W)O4·(H2O) P 4/mnm 4/m 2/m 2/m
 
IV/D.02-40 Cassiterite SnO2 P 4/mnm 4/m 2/m 2/m
 
IV/D.02-45 Argutite GeO2 P 4/mnm 4/m 2/m 2/m
 
IV/D.02-50 Paratellurite TeO2 P 41212,P 43212 4 2 2
 
IV/D.02-60 Plattnerite PbO2 P 4/mnm 4/m 2/m 2/m
 

Other Cassiterite Information
Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Cassiterite :
1 -Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 - Applied Mineralogy 4 -Athena 5 - Crocoite.com Mineral Locations 6 - EUROmin Project 7 - Glendale Community College 8 -Google Images 9 -Google Scholar 10 -Handbook of Mineralogy (UofA) 11 - HyperPhysics 12 -MinDAT 13 -MinMax(Deutsch) 14 -MinMax(English) 15 -Mineralienatlas (Deutsch) 16 - Philatelic Mineralogy 17 -QUT Mineral Atlas 18 - Scandinavian mineral gallery 19 - Tradeshop.com - The Rainbow of Gems 20 -University of Colorado - Mineral Structure Data 21 - WWW-MINCRYST 22 -theimage 23 -École des Mines de Paris

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Cassiterite

SnO2
Dana No: 4.4.1.5 Strunz No: IV/D.02-40
Locality:

 

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