Mineralogy Database

Blossite Mineral Data

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General Blossite Information

Help on Chemical  Formula: Chemical Formula: Cu2V+++++2O7
Help on Composition: Composition: Molecular Weight = 340.97 gm
   Vanadium  29.88 %  V    53.34 % V2O5
   Copper    37.27 %  Cu   46.66 % CuO
   Oxygen    32.85 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Cu2V5+2O7
Help on Environment: Environment: A very rare sublimate, probably formed between 100-200 deg C, from the outer sulfate zone of a fumarole in the crater of a basaltic composite volcano.
Help on IMA Status: IMA Status: Approved IMA 1986
Help on Locality: Locality: Summit crater of Izalco Volcano, San Salvador. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for F. Donald Bloss, American mineralogist, Virginia Polytechnic Institute, Blacksburg, Virginia.
Help on Name Pronunciation: Name Pronunciation: Blossite Say BLOSSITE
Help on Synonym: Synonym: ICSD 1831
  PDF 26-566

Blossite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =2.4637:1:0.7681
Help on Cell Dimensions: Cell Dimensions: a = 20.676, b = 8.392, c = 6.446, Z = 8; V = 1,118.46 Den(Calc)= 4.05
Help on Crystal System: Crystal System: Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: F dd2
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.08(1), 3.26(1), 2.483(0.8),3.22(0.8), 1.712(0.7), 2.096(0.7), 2.102(0.7),

Physical Properties of Blossite

Help on Color: Color: Black.
Help on Density: Density: 3.95 - 3.97, Average = 3.96
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Anhedral Grains - Granular minerals without the expression of crystal shapes
Help on Luster: Luster: Metallic
Help on Streak: Streak: red brown

Optical Properties of Blossite

Help on Optical Data: Optical Data: NCalc= 2.06 - from Gladstone-Dale relationship (KC = 0.2607) where Ncalc=Dcalc*KC+1
NCalc= 2.03 - from Gladstone-Dale relationship (KC = 0.2607) where Ncalc=Dmeas*KC+1
Help on RL Anisotrophism: RL Anisotrophism: Moderate, gray to creamy gray-brown.
Help on RL Bireflectance: RL Bireflectance: Weak to moderate, in shades of cream-white.
Help on RL Color: RL Color: White, with red-brown internal reflections.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Blossite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 481 nm   14.60   15.30 
 547 nm   15.40   16.60 
 591 nm   14.80   16.70 
 644 nm   14.50   15.70 
Calculated Relative Intensity Colors of Blossite in Air
   0%   60% 100% 120% 180% 240% 300% 360% 420% 480% 540% 600%

Calculated Properties of Blossite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.80 gm/cc
note: Specific Gravity of Blossite =4.05 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0009046683
Boson Index = 0.9990953317
Help on Photoelectric: Photoelectric: PEBlossite = 22.56 barns/electron
U=PEBlossite x rElectron Density= 85.76 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Blossite is Not Radioactive

Blossite Classification

Help on  Dana Class: Dana Class: (38)Anhydrous Phosphates, etc
  (38.05)with miscellaneous formulae
  (38.05.06)Dana Group Blossite Cu2V2O7 F dd2 mm2
Help on  Strunz Class: Strunz Class: 08.FA.05 08 - PHOSPHATES, ARSENATES, VANADATES
  08.F - Polyphosphates, Polyarsenates, [4]-Polyvanadates
  08.FA -Polyphosphates, etc., without OH and H2O; dimers of corner-sharing RO4 tetrahedra.
08.FA.05 Blossite Cu2V2O7 F dd2 mm2

Other Blossite Information

Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(Am.Min.,Vol.72,p397-400,1987) OPTIC PROP.(AntBidBlaNic3)
Help on See Also: See Also: Links to other databases for Blossite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 08.FA.05





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