Mineralogy Database

Varlamoffite Mineral Data

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General Varlamoffite Information

Help on Chemical  Formula: Chemical Formula: (Sn,Fe)(O,OH)2
Help on Composition: Composition: Molecular Weight = 135.50 gm
   Iron      10.30 %  Fe   14.73 % Fe2O3
   Tin       65.71 %  Sn   83.42 % SnO2
   Hydrogen   0.37 %  H     3.32 % H2O
   Oxygen    23.62 %  O
            ______        ______ 
            100.00 %      101.48 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Sn0.75Fe3+0.25O1.5(OH)0.5
Help on Environment: Environment: Oxidized protions of stannite-cassiterite veins.
Help on IMA Status: IMA Status: Not Approved IMA 1946
Help on Locality: Locality: Cligga mine, Cronwall, England. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Nicolas Varlamoff (1910-1976), Belgian geologist who collected the mineral.

Varlamoffite Image

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Comments: Yellowish earthy varlamoffite masses with quartz.
Location: Saint Austell, Cornwall, England. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Varlamoffite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.66454
Help on Cell Dimensions: Cell Dimensions: a = 4.71, c = 3.13, Z = 1; V = 69.44 Den(Calc)= 3.24
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: P 41/mnm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.75(1), 2.6(0.8), 3.33(0.8),

Physical Properties of Varlamoffite

Help on Cleavage: Cleavage: None
Help on Color: Color: Yellow, Orange red.
Help on Density: Density: 2.52 - 2.61, Average = 2.56
Help on Diaphaneity: Diaphaneity: Translucent to Opaque
Help on Hardness: Hardness: 6-6.5 - Orthoclase-Pyrite
Help on Luster: Luster: Waxy
Help on Streak: Streak: light yellow

Optical Properties of Varlamoffite

Help on Optical Data: Optical Data: NCalc= 1.57 - from Gladstone-Dale relationship (KC = 0.177) where Ncalc=Dcalc*KC+1
NCalc= 1.45 - from Gladstone-Dale relationship (KC = 0.177) where Ncalc=Dmeas*KC+1

Calculated Properties of Varlamoffite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.89 gm/cc
note: Specific Gravity of Varlamoffite =3.24 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.11
Boson Index = 0.89
Help on Photoelectric: Photoelectric: PEVarlamoffite = 205.99 barns/electron
U=PEVarlamoffite x rElectron Density= 596.00 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Varlamoffite is Not Radioactive

Varlamoffite Classification

Help on  Dana Class: Dana Class: (04)Simple Oxides
  (04.04)with a cation charge of 4+ (A++++ O2)
  (04.04.02)Dana Group Varlamoffite* (Sn,Fe)(O,OH)2 P 41/mnm 4/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 04.DB.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.D - Metal:Oxygen = 1:2 and similar
  04.DB -With medium-sized cations; chains of edge-sharing octahedra
04.DB.05 Argutite GeO2 P 4/mnm 4/m 2/m 2/m
04.DB.05 Cassiterite SnO2 P 4/mnm 4/m 2/m 2/m
04.DB.05 Rutile TiO2 P 4/mnm 4/m 2/m 2/m
04.DB.05 Pyrolusite MnO2 P 4/mnm 4/m 2/m 2/m
04.DB.05 Plattnerite PbO2 P 4/mnm 4/m 2/m 2/m
04.DB.05 Varlamoffite* (Sn,Fe)(O,OH)2 P 41/mnm 4/m 2/m 2/m
04.DB.05 Squawcreekite? (Fe,Sb,W)O4•(H2O) P 4/mnm 4/m 2/m 2/m
04.DB.05 Tugarinovite MoO2 P 21/n 2/m
04.DB.05 Tripuhyite FeSbO4 P 41/mnm 4/m 2/m 2/m

Other Varlamoffite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Varlamoffite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - MinDAT
8 - Mineralienatlas (Deutsch)
9 - Online Mineral Museum
10 - QUT Mineral Atlas
11 - Ruff.Info

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Dana No: Strunz No: 04.DB.05





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