Ferronigerite-2N1S Mineral Data

General Ferronigerite-2N1S Information

Chemical Formula:

(Zn,Mg,Fe++)(Sn,Zn)2(Al,Fe+++)12O22(OH)2

Composition:

Molecular Weight = 1,041.00 gm

Magnesium 0.70 % Mg 1.16 % MgO

Aluminum 27.21 % Al 51.42 % Al₂O₃

Zinc 3.77 % Zn 4.69 % ZnO

Iron 10.73 % Fe 2.76 % FeO / 12.27 % Fe₂O₃

Tin 20.53 % Sn 26.06 % SnO₂

Hydrogen 0.17 % H 1.56 % H₂O

Oxygen 36.89 % O

______ ______

100.00 % 99.92 % = TOTAL OXIDE

Empirical Formula:

Fe²⁺_0.4Zn_0.4Mg_0.3Fe³⁺_0.1Sn_1.8Zn_0.2Al_10.5Fe³⁺_1.5O_22.2(OH)_1.8

Environment:

Tin-bearing pegmatitic rocks.

IMA Status:

Valid Species (Pre-IMA) 1947

Locality:

Egbe district, Nigeria, Africa. Link to MinDat.org Location Data.

Name Origin:

Named after its locality and FERRO (Iron). (S=Spinel, N=Nolanite Layers).

Synonym:

IMA2001-A

Nigerite

Nigerite-6H

Nigerite-6T

Ferronigerite-2N1S Image

Images:

Ferronigerite-2N1S

Comments: Hexagonal crystal of ferronigerite-2N1S with an inset back-light image showing the deep brown tranparency.
Location: Stiepelmann Mine, Arandis, Swakopmund District, Erongo Region, Namibia. Scale: Crystal Size 1.0 x 0.8 x 0.1 cm.
© Rob Lavinsky

Ferronigerite-2N1S Crystallography

Axial Ratios:

a:c = 1:2.42307

Cell Dimensions:

a = 5.72, c = 13.86, Z = 1; V = 392.72 Den(Calc)= 4.40

Crystal System:

Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: P 3m or P 3m1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.42(1), 2.85(0.9), 1.55(0.6),

Physical Properties of Ferronigerite-2N1S

Cleavage:

None

Color:

Colorless, Amber yellow, Golden brown, Brown, Red.

Density:

4.51

Diaphaneity:

Opaque

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Habit:

Hexagonal - Six-sided crystal shape in cross-section or habit.

Habit:

Platy - Sheet forms (e.g. micas).

Hardness:

8.5 - Chrysoberyl

Luminescence:

Non-fluorescent.

Luster:

Vitreous - Greasy

Magnetism:

Weakly magnetic

Streak:

grayish white

Optical Properties of Ferronigerite-2N1S

Dichroism (e):

brownish yellow or yellow brown.

Dichroism (w):

pale brownish yellow or yellow.

Gladstone-Dale:

CI meas= 0.119 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.097 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.183,KPDmeas= 0.1785,KC= 0.2026
Ncalc = 1.89 - 1.91

Optical Data:

Uniaxial (+), w=1.8, e=1.81, bire=0.0100.

Calculated Properties of Ferronigerite-2N1S

Electron Density:

Bulk Density (Electron Density)=4.18 gm/cc
note: Specific Gravity of Ferronigerite-2N1S =4.40 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_{Ferronigerite-2N1S}= 65.60 barns/electron
U=PE_{Ferronigerite-2N1S} x rElectron Density= 273.88 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ferronigerite-2N1S is Not Radioactive

Ferronigerite-2N1S Classification

Dana Class:

07.11.08.01 (07)Multiple Oxides

(07.11)as titano-oxides with [4] and [6] substitutions

(07.11.08)Nigerite Group (Sn>Ti)

07.11.08.01 Ferronigerite-2N1S (Zn,Mg,Fe)(Sn,Zn)2(Al,Fe)12O22(OH)2 P 3m or P 3m1 3 2/m

07.11.08.02 Ferronigerite-6N6S! (Fe,Zn)4Sn2(Al,Fe)15O30(OH)2 R 3m 3 2/m

Strunz Class:

04.FC.20 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.20 Ferronigerite-6N6S! (Fe,Zn)4Sn2(Al,Fe)15O30(OH)2 R 3m 3 2/m

04.FC.20 Ferronigerite-2N1S (Zn,Mg,Fe)(Sn,Zn)2(Al,Fe)12O22(OH)2 P 3m or P 3m1 3 2/m

04.FC.20 Magnesionigerite-6N6S! (Mg,Zn,Fe,Al)4(Sn,Fe)2Al10O22(OH)2 Unk Trig

04.FC.20 Magnesionigerite-2N1S (Mg,Zn,Fe,Al)4(Sn,Fe)2Al10O22(OH)2 P 3m 3 2/m

Other Ferronigerite-2N1S Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Ferronigerite-2N1S :
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 Ferronigerite-2N1S Specimen Label here :

Ferronigerite-2N1S

(Zn,Mg,Fe++)(Sn,Zn)2(Al,Fe+++)12O22(OH)2
Dana No: 07.11.08.01 Strunz No: 04.FC.20
Locality:

Notes: