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Magnesiotaaffeite-6N3S Mineral Data

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General Magnesiotaaffeite-6N3S Information

Help on Chemical  Formula: Chemical Formula: (Mg,Fe++,Zn)2Al6BeO12
Help on Composition: Composition: Molecular Weight = 426.60 gm
   Magnesium   9.69 %  Mg   16.06 % MgO
   Beryllium   1.90 %  Be    5.28 % BeO
   Aluminum   37.95 %  Al   71.70 % Al2O3
   Zinc        1.53 %  Zn    1.91 % ZnO
   Iron        3.93 %  Fe    5.05 % FeO
   Oxygen     45.00 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg1.7Fe2+0.3Zn0.1Al6Be0.9O12
Help on Environment: Environment: In a nodule, perhaps formerly a corundum crystal, in high-grade metapyroxinite, metaperidotites, and granulites. Renamed from musgravite.
Help on IMA Status: IMA Status: Approved IMA 2002 (Dana # Added)
Help on Locality: Locality: Located 16 km north-northeast of Ernambella Mission, Musgrave Ranges, South Australia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Count R.Taaffe of Dublin, Ireland, who discovered the mineral in 1945. (S=Spinel, N=Nolanite Layers).
Help on Synonym: Synonym: IMA2001-A

Magnesiotaaffeite-6N3S Image

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  Magnesiotaaffeite-6N3S   Magnesiotaaffeite-2N2S   Taaffeite

Comments: BSE image of magnesiotaaffeite-6N3S (Mgt-6N3S) with a central lamella of magnesiotaaffeite-2N2S (Mgt-2N2S). Other minerals Spl: spinel; Chl: clinochlore.
Location: Polymetamorphic dolomite marble at Eastern Alps, Stubenberg, Styria, Austria. (CanMin, v46:1195). Scale: See Image.
© Canadian Mineralogist

Magnesiotaaffeite-6N3S Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:7.24158
Help on Cell Dimensions: Cell Dimensions: a = 5.675, c = 41.096, Z = 6; V = 1,146.20 Den(Calc)= 3.71
Help on Crystal System: Crystal System: Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.408(1), 1.419(0.8), 2.052(0.7),

Physical Properties of Magnesiotaaffeite-6N3S

Help on Cleavage: Cleavage: {0001} Perfect, {1011} Parting
Help on Color: Color: Light olive green.
Help on Density: Density: 3.68
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
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 Magnesiotaaffeite-6N3S

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.026 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.034 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1987,KPDmeas= 0.2003,KC= 0.2057
Ncalc = 1.76
Help on Optical Data: Optical Data: Uniaxial (-), e=1.735, w=1.739, bire=0.0040.

Calculated Properties of Magnesiotaaffeite-6N3S

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.60 gm/cc
note: Specific Gravity of Magnesiotaaffeite-6N3S =3.68 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEMagnesiotaaffeite-6N3S = 3.25 barns/electron
U=PEMagnesiotaaffeite-6N3S x rElectron Density= 11.72 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Magnesiotaaffeite-6N3S is Not Radioactive

Magnesiotaaffeite-6N3S Classification

Help on  Dana Class: Dana Class: (07)Multiple Oxides
  (07.02)(A+ B++)2 X4 Spinel group
  (07.02.12)Taaffeite Group (T2 = Be + T) Magnesiotaaffeite-6N3S! (Mg,Fe,Zn)2Al6BeO12 R 3m 3 2/m 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 Magnesiotaaffeite-6N3S Information

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

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Dana No: Strunz No: 04.FC.25





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