Rutile Mineral Data

General Rutile Information

Chemical Formula:

TiO2

Composition:

Molecular Weight = 79.88 gm

Titanium 59.94 % Ti 100.00 % TiO₂

Oxygen 40.06 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

TiO₂

Environment:

High pressure and temperature accessory mineral in ignous rocks. Common detrital mineral.

IMA Status:

Valid Species (Pre-IMA) 1803

Locality:

Binnental and Campolungo, Switzerland. Link to MinDat.org Location Data.

Name Origin:

From the Latin, rutilus - "reddish."

Name Pronunciation:

Rutile

Synonym:

ICSD 62677

Ilmenorutile - Nb-bearing rutile

PDF 16-934

Sagenite - reticulated

Struverite - Ta-bearing rutile

Rutile Image

Images:

Rutile Pyrophyllite

Comments: Rutile on fine-grained pyrophyllite.
Location: Graves Mt. Georgia, USA. Scale: 4.5 x 5 cm.
© Fabre Minerals

Images:

Rutile Hematite

Comments: Acicular, golden yellow crystals of rutile epitaxially overgrown on black crystals of hematite. The overgrowths are perpendicular to the trigonal crystallography of the hematite.
Location: Novo Horizonte, Bahia Brazil. Scale: 4 x 3.5 x 3 cm.
© Fabre Minerals

Rutile Crystallography

Axial Ratios:

a:c = 1:0.64388

Cell Dimensions:

a = 4.594, c = 2.958, Z = 2; V = 62.43 Den(Calc)= 4.25

Crystal System:

Tetragonal - Ditetragonal Dipyramidal H-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): 3.245(1), 1.687(0.5), 2.489(0.41),

Forms:

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Forms: ( 1 0 1) ( 1 0 0) ( 1 1 0)

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Physical Properties of Rutile

Cleavage:

{110} Distinct

Color:

Blood red, Bluish, Brownish yellow, Brown red, Violet.

Density:

4.25

Diaphaneity:

Transparent to translucent to opaque

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Massive - Granular - Common texture observed in granite and other igneous rock.

Habit:

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

Hardness:

6-6.5 - Orthoclase-Pyrite

Luminescence:

Non-fluorescent.

Luster:

Adamantine

Streak:

grayish black

Optical Properties of Rutile

Dichroism (e):

red or yellow.

Dichroism (w):

brown or green.

Gladstone-Dale:

CI meas= -0.053 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.053 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.4137,KPDmeas= 0.4137,KC= 0.393
Ncalc = 2.67

Optical Data:

Uniaxial (+), w=2.605-2.621, e=2.899-2.908, bire=0.2870-0.2940.

RL Anisotrophism:

Strong.

RL Color:

Gray with bluish tint.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Rutile in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	23.70	27.00
420 nm	23.20	26.50
440 nm	22.70	26.00
460 nm	22.20	25.50
480 nm	21.70	25.10
500 nm	21.30	24.70
520 nm	20.90	24.30
540 nm	20.60	24.00
560 nm	20.20	23.60
580 nm	20.00	23.40
600 nm	19.70	23.10
620 nm	19.50	22.90
640 nm	19.20	22.80
660 nm	19.10	22.60
680 nm	19.00	22.50
700 nm	18.90	22.50

**Calculated Relative Intensity Colors of Rutile in Air**
Relative Intensity	0%	50%	100%	150%	200%	250%	300%	350%	400%	440%
R₁
R₂

Calculated Properties of Rutile

Electron Density:

Bulk Density (Electron Density)=4.04 gm/cc
note: Specific Gravity of Rutile =4.25 gm/cc.

Fermion Index:

Fermion Index = 0.07
Boson Index = 0.93

Photoelectric:

PE_Rutile= 10.03 barns/electron
U=PE_Rutile x rElectron Density= 40.58 barns/cc.

Radioactivity:

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

Rutile Classification

Dana Class:

04.04.01.01 (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.DB.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.D - Metal:Oxygen = 1:2 and similar

04.DB -With medium-sized cations; chains of edge-sharing octahedra

04.DB.05 Argutite GeO2 P 4/mnm 4/m 2/m 2/m

04.DB.05 Cassiterite SnO2 P 4/mnm 4/m 2/m 2/m

04.DB.05 Rutile TiO2 P 4/mnm 4/m 2/m 2/m

04.DB.05 Pyrolusite MnO2 P 4/mnm 4/m 2/m 2/m

04.DB.05 Plattnerite PbO2 P 4/mnm 4/m 2/m 2/m

04.DB.05 Varlamoffite* (Sn,Fe)(O,OH)2 P 4₁/mnm 4/m 2/m 2/m

04.DB.05 Squawcreekite? (Fe,Sb,W)O4•(H2O) P 4/mnm 4/m 2/m 2/m

04.DB.05 Tugarinovite MoO2 P 2₁/n 2/m

04.DB.05 Tripuhyite FeSbO4 P 4₁/mnm 4/m 2/m 2/m

Other Rutile Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)

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Rutile

TiO2
Dana No: 04.04.01.01 Strunz No: 04.DB.05
Locality:

Notes:

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