Zincohogbomite-2N2S Mineral Data

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).

Name Pronunciation:

Zincohogbomite-2N2S + Pronunciation

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 zincohögbomite-2N2S crystal with blue corundum.
Location: Mikro-Lakka Emery deposit, Kerketeas Mt, Sámos 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

Diaphaneity:

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
Ncalc = 1.88 - 1.89

Optical Data:

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

Calculated Properties of Zincohogbomite-2N2S

Electron Density:

Bulk Density (Electron Density)=4.16 gm/cc
note: Specific Gravity of Zincohogbomite-2N2S =4.31 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

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

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Zincohogbomite-2N2S is Not Radioactive

Zincohogbomite-2N2S Classification

Dana Class:

07.11.07.04 (07)Multiple Oxides

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

(07.11.07)Hogbomite Group (Ti>Sn)

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

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

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

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

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

Strunz Class:

04.CB.20 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.C - Metal:Oxygen = 2:3, 3:5, and Similar

04.CB -With medium-sized cations

04.CB.20 Magnesiohogbomite-6N6S (Mg,Fe)1.4Ti0.3Al4O8 R 3m 3 2/m

04.CB.20 Magnesiohogbomite-2N3S (Mg,Fe)1.4Ti0.3Al4O8 P 6₃mc 6mm

04.CB.20 Magnesiohogbomite-2N2S (Al,Fe,Fe,Mg,Ti,Zn)11O15(OH) P 6₃mc 6mm

04.CB.20 Zincohogbomite-2N2S! (Zn,Fe)(2-2x)(Ti)xAl4O8 P 6₃mc 6mm

04.CB.20 Ferrohogbomite-2N2S! (Fe,Zn,Mg,Al)6Al14(Ti,Fe)2O30(OH)2 P 6₃mc 6mm

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 - 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 Zincohogbomite-2N2S Specimen Label here :

Zincohogbomite-2N2S

(Zn,Fe++)(2-2x)(Ti)xAl4O8
Dana No: 07.11.07.04 Strunz No: 04.CB.20
Locality:

Notes: