Zincohogbomite-2N2S Mineral Data

Zincohogbomite-2N2S Mineral Data +

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General Zincohogbomite-2N2S Information

Chemical Formula:

(Zn,Fe++)(2-2x)(Ti)xAl4O8

Composition:

Molecular Weight = 335.37 gm

Titanium 3.43 % Ti 5.72 % TiO₂

Aluminum 32.18 % Al 60.81 % Al₂O₃

Zinc 15.40 % Zn 19.17 % ZnO

Iron 10.82 % Fe 13.92 % FeO

Oxygen 38.17 % O

______ ______

100.00 % 99.62 % = TOTAL OXIDE

Empirical Formula:

Zn_0.79Fe²⁺_0.65Ti_0.24Al₄O₈

Environment:

Formed by breakdown of gahnite in diasporites (diaspore-bearing metabauxites) and emeries (corundum-bearing metabauxites).

IMA Status:

Approved IMA 1994 (Dana # Added)

Locality:

Emory deposit at Kerketefs Mountain, Samos Island, Greece. Link to MinDat.org Location Data.

Name Origin:

Named as the Zn dominant analogue of högbomite, found as the 8H and 16H polytypes. (S=Spinel, N=Nolanite Layers).

Synonym:

IMA1994-016

IMA2001-A

Zincohogbomite-8H

Zincohogbomite-2N2S Image

Images:

Click Here for Larger Zincohogbomite-2N2S Image

Zincohogbomite-2N2S Corundum

Comments: Thin-Section (Plane Polarized Light) of a brown, twinned zincoh?gbomite-2N2S crystal with blue corundum.
Location: Mikro-Lakka Emery deposit, Kerketeas Mt, S?mos Island, Aegean Islands Department, Greece. Scale: Picture size 1.1 mm.
© Thomas Witzke / Abraxas-Verlag

Zincohogbomite-2N2S Crystallography

Axial Ratios:

a:c = 1:3.20777

Cell Dimensions:

a = 5.708, c = 18.31, Z = 4; V = 516.64 Den(Calc)= 4.31

Crystal System:

Hexagonal - Dihexagonal PyramidalH-M Symbol (6mm) Space Group: P 6₃mc

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

By Intensity(I/I_o): 2.42(1), 1.425(0.8), 2.6(0.8),

Physical Properties of Zincohogbomite-2N2S

Cleavage:

None

Color:

Deep brown, Black.

Density:

4.36

Diaphaniety:

Transparent to Opaque

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Habit:

Euhedral Crystals - Occurs as well-formed crystals showing good external form.

Habit:

Pseudo Tetragonal - Crystals show a tetragonal shape.

Hardness:

7 - Quartz

Luster:

Adamantine

Streak:

brownish

Optical Properties of Zincohogbomite-2N2S

Gladstone-Dale:

CI meas= 0.042 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.031 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1984,KPDmeas= 0.1961,KC= 0.2048

Optical Data:

Uniaxial (-), e=1.832, w=1.878, bire=0.0460.

Calculated Properties of Zincohogbomite-2N2S

Electron Density:

r_electron=4.16 gm/cc
note: r_{Zincohogbomite-2N2S}=4.31 gm/cc.

Fermion Index

Fermion Index = 0.01322
Boson Index = 0.98678

Photoelectric:

PE_{Zincohogbomite-2N2S}= 12.40 barns/electron
U=PE_{Zincohogbomite-2N2S} x r_electron= 51.59 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Zincohogbomite-2N2S is Not Radioactive

Zincohogbomite-2N2S Classification

Dana Class:

7.11.7.4 (7)Multiple Oxides

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

(7.11.7)Hogbomite Group (Ti>Sn)

7.11.7.1 Magnesiohogbomite-2N3S (Mg,Fe)1.4Ti0.3Al4O8 P 6₃mc 6mm

7.11.7.2 Magnesiohogbomite-2N2S (Al,Fe,Fe,Mg,Ti,Zn)11O15(OH) P 6₃mc 6mm

7.11.7.3 Magnesiohogbomite-6N6S (Mg,Fe)1.4Ti0.3Al4O8 R 3m 3 2/m

7.11.7.4 Zincohogbomite-2N2S ! (Zn,Fe)(2-2x)(Ti)xAl4O8 P 6₃mc 6mm

7.11.7.5 Ferrohogbomite-2N2S! (Fe,Zn,Mg,Al)6Al14(Ti,Fe)2O30(OH)2 P 6₃mc 6mm

Strunz Class:

IV/C.07-15 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 Zincohogbomite-2N2S Information

References:

NAME( AmMin, Vol. 84, No. 7-8) PHYS. PROP.(AmMin, Vol. 78, No. 7-8) OPTIC PROP.(AmMin, Vol. 84, No. 7-8)

See Also:

Links to other databases for Zincohogbomite-2N2S :
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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Zincohogbomite-2N2S

(Zn,Fe++)(2-2x)(Ti)xAl4O8
Dana No: 7.11.7.4 Strunz No: IV/C.07-15
Locality:

Notes: