Magnesionigerite-6N6S Mineral Data

Magnesionigerite-6N6S Mineral Data

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General Magnesionigerite-6N6S Information

Chemical Formula:

(Mg,Zn,Fe+++,Al)4(Sn,Fe+++)2Al10O22(OH)2

Composition:

Molecular Weight = 964.03 gm

Magnesium 4.79 % Mg 7.94 % MgO

Aluminum 29.95 % Al 56.58 % Al₂O₃

Zinc 4.07 % Zn 5.07 % ZnO

Iron 5.79 % Fe 1.49 % FeO / 6.63 % Fe₂O₃

Silicon 0.58 % Si 1.25 % SiO₂

Tin 14.78 % Sn 18.76 % SnO₂

Hydrogen 0.21 % H 1.87 % H₂O

Oxygen 39.83 % O

______ ______

100.00 % 99.58 % = TOTAL OXIDE

Empirical Formula:

Mg_1.9Zn_0.6AlSi_0.2Fe²⁺_0.2Sn_1.2Fe³⁺_0.8Al_9.7O₂₂(OH)₂

Environment:

The Mg-analog of nigerite. High temperature metasomatic tungsten ore. Fomerly named Pengzhizhongite-24R for Peng Zhizhong, late Chinese mineralogist.

IMA Status:

Approved IMA 2002

Locality:

Anhua area, Hunan, China. Link to MinDat.org Location Data.

Name Origin:

Named as the MAGNESIum analog of Ferronigerite. (S=Spinel, N=Nolanite Layers).

Synonym:

IMA2001-A

Pengzhizhongite-24R

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Magnesionigerite-6N6S Crystallography

Axial Ratios:

a:c = 1:2.42094

Cell Dimensions:

a = 5.692, c = 13.78, Z = 1; V = 386.64 Den(Calc)= 4.14

Crystal System:

TrigonalSpace Group: Unk

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

By Intensity(I/I_o): 2.423(1), 2.846(0.9), 1.414(0.5),

Physical Properties of Magnesionigerite-6N6S

Color:

Brown, Light yellow, Colorless.

Density:

4.22

Diaphaniety:

Transparent

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

8-8.5 - Between Topaz and Chrysoberyl

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Magnesionigerite-6N6S

Gladstone-Dale:

CI meas= 0.031 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.013 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1952,KPDmeas= 0.1915,KC= 0.1977

Optical Data:

Uniaxial (+), w=1.802, e=1.814, bire=0.0120.

Calculated Properties of Magnesionigerite-6N6S

Electron Density:

r_electron=3.97 gm/cc
note: r_{Magnesionigerite-6N6S}=4.14 gm/cc.

Fermion Index

Fermion Index = 0.0327
Boson Index = 0.9673

Photoelectric:

PE_{Magnesionigerite-6N6S}= 47.21 barns/electron
U=PE_{Magnesionigerite-6N6S} x r_electron= 187.60 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Magnesionigerite-6N6S is Not Radioactive

Magnesionigerite-6N6S Classification

Dana Class:

7.11.9.2 (7)Multiple Oxides

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

(7.11.9)Dana Group

7.11.9.1 Magnesionigerite-2N1S (Mg,Zn,Fe,Al)4(Sn,Fe)2Al10O22(OH)2 P 3m 3 2/m

7.11.9.2 Magnesionigerite-6N6S (Mg,Zn,Fe,Al)4(Sn,Fe)2Al10O22(OH)2 Unk Trig

Strunz Class:

IV/C.07-45* IV - Oxides

IV/C - Oxides with metal : oxygen = 2:3 (M2O3 and related compounds)

IV/C.07 - Högbomite - Mengxianminite series

IV/C.07-10* Magnesiohogbomite-2N2S (Al,Fe,Fe,Mg,Ti,Zn)11O15(OH) P 6₃mc 6mm

IV/C.07-10** Magnesiohogbomite-2N3S (Mg,Fe)1.4Ti0.3Al4O8 P 6₃mc 6mm

IV/C.07-10 Magnesiohogbomite-6N6S (Mg,Fe)1.4Ti0.3Al4O8 R 3m 3 2/m

IV/C.07-15 Zincohogbomite-2N2S! (Zn,Fe)(2-2x)(Ti)xAl4O8 P 6₃mc 6mm

IV/C.07-17 Ferrohogbomite-2N2S! (Fe,Zn,Mg,Al)6Al14(Ti,Fe)2O30(OH)2 P 6₃mc 6mm

IV/C.07-20 Freudenbergite Na2Fe2Ti6O16 C 2/m 2/m

IV/C.07-30 Kamiokite Fe2Mo3O8 P 6₃mc 6mm

IV/C.07-40 Nolanite (V,Fe,Fe,Ti)10O14(OH)2 P 6₃mc 6mm

IV/C.07-42 Rinmanite! (Zn,Mn)2Sb2Mg2Fe4O14(OH)2 P 6₃mc 6mm

IV/C.07-45 Magnesionigerite-2N1S (Mg,Zn,Fe,Al)4(Sn,Fe)2Al10O22(OH)2 P 3m 3 2/m

IV/C.07-45* Magnesionigerite-6N6S (Mg,Zn,Fe,Al)4(Sn,Fe)2Al10O22(OH)2 Unk Trig

IV/C.07-50 Ferronigerite-2N1S (Zn,Mg,Fe)(Sn,Zn)2(Al,Fe)12O22(OH)2 P 3m or P 3m1 3 2/m

IV/C.07-50* Ferronigerite-6N6S (Fe,Zn)4Sn2(Al,Fe)15O30(OH)2 R 3m 3 2/m

IV/C.07-60 Mengxianminite* (Ca,Na)3(Fe,Mn)2Mg2(Sn,Zn)5Al8O29 Unk Ortho

Other Magnesionigerite-6N6S Information

References:

NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.76,p1728,1991) OPTIC PROP.(Am.Min.,Vol.76,p1728,1991)

See Also:

Links to other databases for Magnesionigerite-6N6S :
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

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Print or Cut-and-Paste your Magnesionigerite-6N6S Specimen Label here :

Magnesionigerite-6N6S

(Mg,Zn,Fe+++,Al)4(Sn,Fe+++)2Al10O22(OH)2
Dana No: 7.11.9.2 Strunz No: IV/C.07-45*
Locality:

Notes: