Ilmenite Mineral Data

Ilmenite Mineral Data +

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General Ilmenite Information

Chemical Formula:

Fe++TiO3

Composition:

Molecular Weight = 151.73 gm

Titanium 31.56 % Ti 52.65 % TiO₂

Iron 36.81 % Fe 47.35 % FeO

Oxygen 31.63 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Fe²⁺TiO₃

Environment:

Common accessory mineral in igneous and metamorphic rocks. Commonly concentrated in placers as "black sand" deposits.

IMA Status:

Valid Species (Pre-IMA) 1827

Locality:

Ilmen Mountains, southern Urals, of the Russia. Link to MinDat.org Location Data.

Name Origin:

Named after It's locality.

Synonym:

ICSD 30664

Leucoxene-alteration

Menaccanite

PDF 29-733

Titanic Iron Ore

Titanoferrite

Ilmenite Image

Images:

Ilmenite

Comments: Sharp, opaque crystal of Ilmenite.
Location: Mont St. Hilaire, Quebec, Canada. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Ilmenite Crystallography

Axial Ratios:

a:c = 1:2.76065

Cell Dimensions:

a = 5.093, c = 14.06, Z = 6; V = 315.84 Den(Calc)= 4.79

Crystal System:

Trigonal - RhombohedralH-M Symbol ( 3) Space Group: R 3

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

By Intensity(I/I_o): 2.754(1), 2.544(0.7), 1.7261(0.55),

Forms:

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Forms: [ 1 1 0] [ 0 1 1] [ 0 0 1]

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Crystal Structure:

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Wechsler B A , Prewitt C T , American Mineralogist , 69 (1984) p.176-185, Crystal structure of ilmenite (FeTiO3) at high temperature and high pressure, 24 deg C

View Additional jPOWD Structure files for Ilmenite
[1] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [2] [20] [21] [22] [23] [24] [25] [26] [27] [28] [29] [3] [30] [31] [32] [33] [34] [35] [36] [37] [38] [39] [4] [40] [41] [42] [43] [44] [45] [46] [47] [48] [49] [5] [6] [7] [8] [9]

Physical Properties of Ilmenite

Cleavage:

None

Color:

Iron black, Black.

Density:

4.72

Diaphaniety:

Opaque

Fracture:

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

Habit:

Massive - Lamellar - Distinctly foliated fine-grained forms.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

5-5.5 - Apatite-Knife Blade

Luminescence:

None.

Luster:

Sub Metallic

Magnetism:

Naturally weak

Streak:

brownish black

Optical Properties of Ilmenite

Dichroism (e):

dark brown.

Dichroism (w):

pinkish brown.

Optical Data:

Uniaxial (-).

NCalc= 2.42 - from Gladstone-Dale relationship (KC = 0.2959) where Ncalc=Dcalc*KC+1
NCalc= 2.4 - from Gladstone-Dale relationship (KC = 0.2959) where Ncalc=Dmeas*KC+1

RL Anisotrophism:

Strong in shades of gray.

RL Bireflectance:

Strong.

RL Color:

Gray, brownish tinted.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Ilmenite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	20.00	21.20
420 nm	19.50	20.80
440 nm	19.00	20.40
460 nm	18.50	20.10
480 nm	18.10	20.00
500 nm	18.00	19.80
520 nm	18.00	19.80
540 nm	18.00	19.70
560 nm	18.00	19.60
580 nm	18.00	19.80
600 nm	18.10	19.90
620 nm	18.20	19.90
640 nm	18.30	19.90
660 nm	18.40	20.00
680 nm	18.50	20.10
700 nm	18.60	20.40

**Calculated Relative Intensity Colors of Ilmenite in Air**
Relative Intensity	0%	50%	100%	150%	200%	250%	300%	350%	400%	450%	490%
R₁
R₂

Calculated Properties of Ilmenite

Electron Density:

r_electron=4.55 gm/cc
note: r_Ilmenite=4.79 gm/cc.

Fermion Index

Fermion Index = 0.04875
Boson Index = 0.95125

Photoelectric:

PE_Ilmenite= 16.55 barns/electron
U=PE_Ilmenite x r_electron= 75.25 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Ilmenite is Not Radioactive

Ilmenite Classification

Dana Class:

4.3.5.1 (4)Simple Oxides

(4.3)with a cation charge of 3+ (A+++2 O3)

(4.3.5)Dana Group

4.3.5.1 Ilmenite FeTiO3 R 3 3

4.3.5.2 Geikielite MgTiO3 R 3 3

4.3.5.3 Pyrophanite MnTiO3 R 3 3

4.3.5.4 Ecandrewsite (Zn,Fe,Mn)TiO3 R 3 3

4.3.5.5 Melanostibite Mn(Sb,Fe)O3 R 3 3

4.3.5.6 Brizziite-III NaSbO3 R 3 3

4.3.5.7 Akimotoite! (Mg,Fe)SiO3 R 3 3

Strunz Class:

IV/C.05-20 IV - Oxides

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

IV/C.05 - Ilmenite group, Geikilith - Brizziite series

IV/C.05-05 Akimotoite! (Mg,Fe)SiO3 R 3 3

IV/C.05-10 Geikielite MgTiO3 R 3 3

IV/C.05-20 Ilmenite FeTiO3 R 3 3

IV/C.05-30 Pyrophanite MnTiO3 R 3 3

IV/C.05-40 Ecandrewsite (Zn,Fe,Mn)TiO3 R 3 3

IV/C.05-50 Melanostibite Mn(Sb,Fe)O3 R 3 3

IV/C.05-60 Brizziite-III NaSbO3 R 3 3

IV/C.05-60* Brizziite-VII NaSbO3 R 3 3

Other Ilmenite Information

References:

NAME( Sinkankas66) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)

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Print or Cut-and-Paste your Ilmenite Specimen Label here :

Ilmenite

Fe++TiO3
Dana No: 4.3.5.1 Strunz No: IV/C.05-20
Locality:

Notes: