Ferrotaaffeite-6N3S Mineral Data

Ferrotaaffeite-6N3S Mineral Data
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General Ferrotaaffeite-6N3S Information

Help on Chemical Formula: Chemical Formula: (Fe++,Zn,Mg)2Al6BeO12
Help on Composition: Composition: Molecular Weight = 470.24 gm
   Magnesium   1.03 %  Mg    1.71 % MgO
   Beryllium   1.72 %  Be    4.79 % BeO
   Aluminum   34.43 %  Al   65.05 % Al2O3
   Zinc        4.17 %  Zn    5.19 % ZnO
   Iron       17.81 %  Fe   22.92 % FeO
   Oxygen     40.83 %  O
             ______        ______ 
             100.00 %       99.66 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe2+1.5Zn0.3Mg0.2Al6Be0.9O12
Help on Environment: Environment: Wall zone of a granitic pegmatite in "hornblende" gabbro. Renamed from pehrmanite.
Help on IMA Status: IMA Status: Approved IMA 1981
Help on Locality: Locality: Rosendal pegmatite, Kemio (Kimito) Island, southwestern Finland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as the FERRous analog of magnesiotaaffeite. (S=Spinel, N=Nolanite Layers).
Help on Synonym: Synonym: IMA2001-A
  Pehrmanite
 

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Ferrotaaffeite-6N3S Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:7.22105
Help on Cell Dimensions: Cell Dimensions: a = 5.7, c = 41.16, Z = 6; V = 1,158.13 Den(Calc)= 4.05
Help on Crystal System: Crystal System: Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.422(1), 2.856(0.8), 1.426(0.5),
 

Physical Properties of Ferrotaaffeite-6N3S

Help on Cleavage: Cleavage: {???} Indistinct
Help on Color: Color: Light green.
Help on Density: Density: 4.07
Help on Diaphaneity: Diaphaneity: Semitransparent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Hexagonal - Six-sided crystal shape in cross-section or habit.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 8-8.5 - Between Topaz and Chrysoberyl
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Ferrotaaffeite-6N3S

Help on Dichroism (e): Dichroism (e): pale grayish brown.
Help on Dichroism (w): Dichroism (w): pale greenish.
Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.034 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.029 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1951,KPDmeas= 0.1941,KC= 0.2009
Ncalc = 1.81 - 1.82
Help on Optical Data: Optical Data: Uniaxial (-), w=1.79.
Help on RL Anisotrophism: RL Anisotrophism: Very weak.
Help on RL Color: RL Color: Gray.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Ferrotaaffeite-6N3S in Air
λ R  ∑ R(λ) 
 470 nm    8.34   
 546 nm    8.11 
 589 nm    8.01 
 650 nm    7.86 
Calculated Relative Intensity Colors of Ferrotaaffeite-6N3S in Air
Relative
Intensity		    0% 100% 200% 300% 400% 500% 600% 700% 800% 900% 1000%
R                      
 

Calculated Properties of Ferrotaaffeite-6N3S

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.93 gm/cc
note: Specific Gravity of Ferrotaaffeite-6N3S =4.05 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEFerrotaaffeite-6N3S = 8.44 barns/electron
U=PEFerrotaaffeite-6N3S x rElectron Density= 33.16 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ferrotaaffeite-6N3S is Not Radioactive
 

Ferrotaaffeite-6N3S Classification
Help on Dana Class: Dana Class: 07.02.12.02 (07)Multiple Oxides
  (07.02)(A+ B++)2 X4 Spinel group
  (07.02.12)Taaffeite Group (T2 = Be + T)
 
07.02.12.01 Magnesiotaaffeite-6N3S! (Mg,Fe,Zn)2Al6BeO12 R 3m 3 2/m
 
07.02.12.02 Ferrotaaffeite-6N3S (Fe,Zn,Mg)2Al6BeO12 R 3m 3 2/m
Help on Strunz Class: Strunz Class: 04.FC.25 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.F - Hydroxides (without V or U)
  04.FC -Hydroxides with OH, without H2O; corner-sharing octahedra
 
04.FC.25 Magnesiotaaffeite-6N3S! (Mg,Fe,Zn)2Al6BeO12 R 3m 3 2/m
 
04.FC.25 Magnesiotaaffeite-2N2S Mg3Al8BeO16 P 63mc 6mm
 
04.FC.25 Ferrotaaffeite-6N3S (Fe,Zn,Mg)2Al6BeO12 R 3m 3 2/m
 

Other Ferrotaaffeite-6N3S Information
Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)
Help on See Also: See Also: Links to other databases for Ferrotaaffeite-6N3S :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - Google Images
4 - Google Scholar
5 - MinDAT
6 - MinMax(Deutsch)
7 - MinMax(English)
8 - Mineralienatlas (Deutsch)
9 - QUT Mineral Atlas
10 - Ruff.Info

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Ferrotaaffeite-6N3S

(Fe++,Zn,Mg)2Al6BeO12
Dana No: 07.02.12.02 Strunz No: 04.FC.25
Locality:

 

Notes: