Ferrohogbomite-2N2S Mineral Data

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General Ferrohogbomite-2N2S Information

Chemical Formula:

(Fe++,Zn,Mg,Al)6Al14(Ti,Fe)2O30(OH)2

Composition:

Molecular Weight = 1,269.78 gm

Magnesium 1.99 % Mg 3.30 % MgO

Titanium 3.05 % Ti 5.10 % TiO₂

Manganese 0.22 % Mn 0.28 % MnO

Aluminum 31.66 % Al 59.82 % Al₂O₃

Zinc 4.79 % Zn 5.96 % ZnO

Chromium 0.08 % Cr 0.12 % Cr₂O₃

Gallium 0.16 % Ga 0.22 % Ga₂O₃

Iron 18.47 % Fe 16.47 % FeO / 8.11 % Fe₂O₃

Silicon 0.02 % Si 0.05 % SiO₂

Nickel 0.05 % Ni 0.06 % NiO

Tin 0.28 % Sn 0.36 % SnO₂

Hydrogen 0.16 % H 1.43 % H₂O

Oxygen 39.06 % O

______ ______

100.00 % 101.27 % = TOTAL OXIDE

Empirical Formula:

Fe²⁺_2.91Zn_0.93Mg_1.04Mn²⁺_0.05Ni_0.01Al_1.06Al_13.84Fe³⁺_1.29Ti_0.81Ga_0.03Sn_0.03Cr_0.02Si_0.01 O_28.98(OH)_2.02

Environment:

Metamorphic environments (T 500 to 730 deg C) ultrahigh-temperature granulite-facies. (högbomite group; structure).

IMA Status:

Approved IMA 2002 (Dana # Added)

Locality:

Ain Taiba, Grand Erg Oriental, Algerian Sahara. Link to MinDat.org Location Data.

Name Origin:

Named as the Fe-dominant member of the hogbomite series.

Synonym:

Hogbomite-8H

IMA2001-048

Ferrohogbomite-2N2S Image

Images:

Ferrohogbomite-2N2S

Comments: Photomicrograph of euhedral ferrohogbomite-2N2S grains (Hog) in magnetite (Mgt). (MinMag, v 67, p 1084).
Location: Eastern Ghats belt, Andhra Pradesh, India. Scale: See Image.
© Mineralogical Magazine

Ferrohogbomite-2N2S Crystallography

Axial Ratios:

a:c = 1:3.20675

Cell Dimensions:

a = 5.712, c = 18.317, Z = 1; V = 517.56 Den(Calc)= 4.07

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): 2.427(1)(114), 2.603(0.88)(016), 1.43(0.56)(220),2.86(0.53)(110), 1.475(0.44)(0.2.10), 1.597(0.34)(126), 2.053(0.34)(025), 2.948(0.32)(015), 2.392(0.28)(022),

Crystal Structure:

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Hejny C , Gnos E , Grobety B , Armbruster T , European Journal of Mineralogy , 14 (2002) p.957-967, Crystal chemistry of the polysome ferrohogbomite-2N2S,, a long-known but newly defined mineral species

Physical Properties of Ferrohogbomite-2N2S

Cleavage:

{001} Distinct

Color:

Chestnut brown.

Diaphaneity:

Translucent

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

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

Habit:

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

Hardness:

6-7 - Orthoclase-Quartz

Luster:

Adamantine

Streak:

brown

Optical Properties of Ferrohogbomite-2N2S

Gladstone-Dale:

CI calc= 0.076 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2063,KC= 0.2232
Ncalc = 1.91

Optical Data:

Uniaxial (-), e=1.827, w=1.852, bire=0.0250.

Calculated Properties of Ferrohogbomite-2N2S

Electron Density:

Bulk Density (Electron Density)=3.95 gm/cc
note: Specific Gravity of Ferrohogbomite-2N2S =4.07 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_{Ferrohogbomite-2N2S}= 10.35 barns/electron
U=PE_{Ferrohogbomite-2N2S} x rElectron Density= 40.85 barns/cc.

Radioactivity:

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

Ferrohogbomite-2N2S Classification

Dana Class:

07.11.07.05 (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 Ferrohogbomite-2N2S Information

References:

NAME( AmMin, 88:1176) PHYS. PROP.(AmMin, 88:1176) OPTIC PROP.(AmMin, 88:1176)

See Also:

Links to other databases for Ferrohogbomite-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 Ferrohogbomite-2N2S Specimen Label here :

Ferrohogbomite-2N2S

(Fe++,Zn,Mg,Al)6Al14(Ti,Fe)2O30(OH)2
Dana No: 07.11.07.05 Strunz No: 04.CB.20
Locality:

Notes: