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

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

Musgravite

Magnesiotaaffeite-6N3S Image

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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 ScalenohedralH-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),

Click Here for Large Magnesiotaaffeite-6N3S Structure Window Crystal Structure:

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Help on Above

| | Nuber B , Schmetzer K , Neues Jahrbuch fur Mineralogie, Monatshefte , 1983 (1983) p.393-402, Crystal structure of ternary Be-Mg-Al oxides: taaffeite, BeMg3Al8O16,, and musgravite, BeMg2Al6O12, Note: formerly known as musgravite-18R, Locality: Musgrave Ranges, Australia View Additional jPOWD Structure files for Magnesiotaaffeite-6N3S [1] | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |

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:

07.02.12.01 (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 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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Print or Cut-and-Paste your Magnesiotaaffeite-6N3S Specimen Label here :

Magnesiotaaffeite-6N3S

(Mg,Fe++,Zn)2Al6BeO12
Dana No: 07.02.12.01 Strunz No: 04.FC.25
Locality:

Notes: