Ferrotaaffeite-6N3S Mineral Data (original) (raw)

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

RelativeIntensity 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 - 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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Print or Cut-and-Paste your Ferrotaaffeite-6N3S Specimen Label here :

Ferrotaaffeite-6N3S

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

Notes: