Rasvumite Mineral Data + Say RASVUMITE

General Rasvumite Information
Help on Chemical Formula: Chemical Formula: KFe2S3
Help on Composition: Composition: Molecular Weight = 246.99 gm
   Potassium  15.83 %  K
   Iron       45.22 %  Fe
   Sulfur     38.95 %  S
             ______ 
             100.00 % 
Help on Empirical Formula: Empirical Formula: KFe2+2S3
Help on Environment: Environment: In pegmatites.
Help on IMA Status: IMA Status: Approved IMA 1970
Help on Locality: Locality: Rasvumchorr and Kidusvumchorr apatite deposits, Khibina massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Synonym: Synonym: ICSD 100180
  PDF 33-1018
 

Rasvumite Image

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Rasvumite

Comments: Opaque dull orange fibrous rasvumite masses.
Location: Coyote Peak, Humboldt County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species
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Rasvumite

Comments: Reddish brown micro crystals of rasvumite in vugs to about 0.75mm.
Location: Kirovskiy mine, Khibina massif, Kola Peninsula, Russia. Scale: 3.5 x 2.5 x 2.5cm.
© Tom Loomis / Dakota Matrix

Rasvumite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.8212:1:0.4928
Help on Cell Dimensions: Cell Dimensions: a = 9.049, b = 11.019, c = 5.431, Z = 4; V = 541.53 Den(Calc)= 3.03
Help on Crystal System: Crystal System: Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: C mcm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.99(1), 1.799(0.9), 5.54(0.8),
Click Here for Large Rasvumite Structure Window Crystal Structure:

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drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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Clark J R , Brown G E , American Mineralogist , 65 (1980) p.477-482, Crystal structure of rasvumite, KFe2S3

 

Physical Properties of Rasvumite

Help on Cleavage: Cleavage: [110] Perfect
Help on Color: Color: Brownish black, Gray, Black, Steel gray.
Help on Density: Density: 3.1
Help on Diaphaniety: Diaphaniety: Opaque
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Hardness: Hardness: 4-5 - Fluorite-Apatite
Help on Luster: Luster: Metallic
 

Optical Properties of Rasvumite

Help on RL Anisotrophism: RL Anisotrophism: Strong.
Help on RL Pleochroism: RL Pleochroism: Strong.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Rasvumite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   15.90   23.60 
   
 420 nm   16.20   23.90 
 440 nm   16.50   24.20 
 460 nm   16.70   23.60 
 480 nm   16.90   23.30 
 500 nm   17.10   23.30 
 520 nm   17.40   23.50 
 540 nm   17.70   23.80 
 560 nm   18.10   24.20 
 580 nm   18.60   24.70 
 600 nm   19.20   25.30 
 620 nm   19.80   25.80 
 640 nm   20.20   26.30 
 660 nm   20.50   26.70 
 680 nm   20.60   27.00 
 700 nm   20.70   27.00 
Calculated Relative Intensity Colors of Rasvumite in Air
Relative
Intensity		    0%   60% 100% 120% 180% 240% 300% 360% 420% 480% 530%
R1                      
R2                      
 

Calculated Properties of Rasvumite

Help on Electron Density: Electron Density:

relectron=2.92 gm/cc
note: rRasvumite =3.03 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.01252
Boson Index = 0.98748
Help on Photoelectric: Photoelectric:

PERasvumite = 17.34 barns/electron
U=PERasvumite x relectron= 50.64 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 220.07 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Rasvumite - barely detectable

 

Rasvumite Classification
Help on Dana Class: Dana Class: 2.9.11.1 (2)Sulfides - Including Selenides and Tellurides
  (2.9)where Am Bn Xp, with (m+n):p=1:1
  (2.9.11)Dana Group
 
2.9.11.1 Rasvumite KFe2S3 C mcm 2/m 2/m 2/m
 
2.9.11.2 IMA2004-005! CsFe2S3 C mcm 2/m 2/m 2/m
Help on Strunz Class: Strunz Class: II/F.07-10 II - Sulfides and sulphosalts
  II/F - Sulfides with nonmetallic properties, Alkalisulfides
  II/F.07 - Rasvumite - Bartonite series
 
II/F.07-10 Rasvumite KFe2S3 C mcm 2/m 2/m 2/m
 
II/F.07-20 Bartonite K3Fe10S14 I 4/mmm 4/m 2/m 2/m
 
II/F.07-30 Chlorbartonite! K6Fe24S26(Cl,S) I 4/mmm 4/m 2/m 2/m
 

Other Rasvumite Information
Help on References: References: NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Rasvumite :
1 - Alkali-Nuts(English) 2 - Alkali-Nuts(Francais) 3 -Am. Min. Crystal Structure Database 4 -Athena 5 - EUROmin Project 6 -Google Images 7 -Google Scholar 8 -Handbook of Mineralogy (UofA) 9 -MinDAT 10 -MinMax(Deutsch) 11 -MinMax(English) 12 -Mineralienatlas (Deutsch) 13 -QUT Mineral Atlas 14 - WWW-MINCRYST 15 -École des Mines de Paris

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Rasvumite

KFe2S3
Dana No: 2.9.11.1 Strunz No: II/F.07-10
Locality:

 

Notes:

 
 
   
 
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