Ilmenorutile Mineral Data

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General Ilmenorutile Information

Chemical Formula:

(Ti,Nb,Fe+++)O2

Composition:

Molecular Weight = 95.27 gm

Titanium 35.18 % Ti 58.69 % TiO₂

Niobium 19.50 % Nb 27.90 % Nb₂O₅

Iron 11.72 % Fe 15.08 % FeO

Oxygen 33.59 % O

______ ______

100.00 % 101.68 % = TOTAL OXIDE

Empirical Formula:

Ti_0.7Nb_0.2Fe²⁺_0.2O₂

Environment:

Late primary mineral in granite pegmatites, carbonatites, and found in alluvial placers. Ilmenorutile (1854) is now regarded as Nb-bearing rutile.

IMA Status:

Valid Species (Pre-IMA) 1854

Locality:

Miass, Ilmen Mountains, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for the occurrence in the Ilmen Mountains and the relation to rutile.

Name Pronunciation:

Ilmenorutile + Pronunciation

Ilmenorutile Image

Images:

Ilmenorutile

Comments: Dark brown ilmenorutile crystal in matrix.
Location: Iveland, Aust-Agder, Norway. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ilmenorutile Crystallography

Axial Ratios:

a:c = 1:0.64741

Cell Dimensions:

a = 4.606, c = 2.982, Z = 2; V = 63.26 Den(Calc)= 5.00

Crystal System:

Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: P 4/mnm

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

By Intensity(I/I_o): 3.23(1), 1.687(0.9), 2.48(0.8),

Physical Properties of Ilmenorutile

Cleavage:

{110} Distinct, {100} Imperfect

Color:

Iron black, Black.

Density:

4.35 - 4.92, Average = 4.63

Diaphaneity:

Opaque

Fracture:

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

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Habit:

Striated - Parallel lines on crystal surface or cleavage face.

Hardness:

6-6.5 - Orthoclase-Pyrite

Luster:

Sub Metallic

Streak:

reddish brown

Optical Properties of Ilmenorutile

Dichroism (e):

brown.

Dichroism (w):

dark bluish green.

Optical Data:

Uniaxial (-).

NCalc= 2.67 - from Gladstone-Dale relationship (KC = 0.3338) where Ncalc=Dcalc*KC+1
NCalc= 2.55 - from Gladstone-Dale relationship (KC = 0.3338) where Ncalc=Dmeas*KC+1

RL Anisotrophism:

Strong.

RL Bireflectance:

Weak.

RL Color:

Pale creamy white.

Calculated Properties of Ilmenorutile

Electron Density:

Bulk Density (Electron Density)=4.70 gm/cc
note: Specific Gravity of Ilmenorutile =5.00 gm/cc.

Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

Photoelectric:

PE_Ilmenorutile= 38.88 barns/electron
U=PE_Ilmenorutile x rElectron Density= 182.85 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ilmenorutile is Not Radioactive

Ilmenorutile Classification

Dana Class:

04.04.01.02 (04)Simple Oxides

(04.04)with a cation charge of 4+ (A++++ O2)

(04.04.01)Rutile group (Tetragonal: P4/mnm)

04.04.01.01 Rutile TiO2 P 4/mnm 4/m 2/m 2/m

04.04.01.02 Ilmenorutile (Ti,Nb,Fe)O2 P 4/mnm 4/m 2/m 2/m

04.04.01.03 Struverite? (Ti,Ta,Fe)O2 P 4/mnm 4/m 2/m 2/m

04.04.01.04 Pyrolusite MnO2 P 4/mnm 4/m 2/m 2/m

04.04.01.05 Cassiterite SnO2 P 4/mnm 4/m 2/m 2/m

04.04.01.06 Plattnerite PbO2 P 4/mnm 4/m 2/m 2/m

04.04.01.07 Argutite GeO2 P 4/mnm 4/m 2/m 2/m

04.04.01.08 Squawcreekite? (Fe,Sb,W)O4•(H2O) P 4/mnm 4/m 2/m 2/m

04.04.01.09 Stishovite SiO2 P 4/mnm 4/m 2/m 2/m

Strunz Class:

04.CB.25 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.25 Ilmenorutile (Ti,Nb,Fe)O2 P 4/mnm 4/m 2/m 2/m

04.CB.25 Pseudorutile Fe2Ti3O9 P 3₂2 3 2

Other Ilmenorutile Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(AntBidBlaNic3) OPTIC PROP.(AntBidBlaNic3)

See Also:

Links to other databases for Ilmenorutile :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - EUROmin Project
6 - Ecole des Mines de Paris
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - MinMax(Deutsch)
13 - MinMax(English)
14 - Mineralienatlas (Deutsch)
15 - QUT Mineral Atlas
16 - Ruff.Info

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Ilmenorutile

(Ti,Nb,Fe+++)O2
Dana No: 04.04.01.02 Strunz No: 04.CB.25
Locality:

Notes: