Pseudorutile Mineral Data

General Pseudorutile Information

Chemical Formula: Fe+++2Ti3O9 Composition: Molecular Weight = 399.33 gm    Titanium  35.97 %  Ti   60.01 % TiO₂    Iron      27.97 %  Fe   39.99 % Fe₂O₃    Oxygen    36.06 %  O             ______        ______              100.00 %      100.00 % = TOTAL OXIDE Empirical Formula: Fe³⁺₂Ti₃O₉ Environment: Alteration in ilmenite placers and beach sands. IMA Status: Approved IMA 1966 Locality: Common and widespread alteration product of ilmenite. Link to MinDat.org Location Data. Name Origin: Named for the composition and as an intermediate product between ilmanite and rutile. Name Pronunciation: Pseudorutile + Pronunciation Synonym: Arizonite   ICSD 4131   Kleberite-(OH)   PDF 47-1777  

Pseudorutile Image

Images:

Pseudorutile Comments: Dark brown grain of hydroxyian pseudorutile (Kleberite), from a heavy mineral concentrate. Location: Königshain, Mittweida, Saxony, Germany. Scale: Picture size 0.8 mm. © Thomas Witzke / Abraxas-Verlag

Pseudorutile Crystallography

Axial Ratios: a:c = 1:0.32104 Cell Dimensions: a = 14.375, c = 4.615, Z = 5; V = 825.88 Den(Calc)= 4.01 Crystal System: Trigonal - TrapezohedralH-M Symbol (3 2) Space Group: P 3₂2 X Ray Diffraction: By Intensity(I/I_o): 1.686(1), 2.481(0.8), 2.183(0.7), Crystal Structure:

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Grey I E , Reid A F , American Mineralogist , 60 (1975) p.898-906, The structure of pseudorutile and its role in the natural alteration of ilmenite

 

Physical Properties of Pseudorutile

Cleavage: None Color: Black, Brown, Red, Gray. Density: 3.8 Diaphaneity: Opaque Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz). Hardness: 3.5 - Copper Penny Luster: Sub Metallic Streak: reddish brown  

Optical Properties of Pseudorutile

Optical Data: NCalc= 2.45 - from Gladstone-Dale relationship (KC = 0.3618) where Ncalc=Dcalc*KC+1
NCalc= 2.37 - from Gladstone-Dale relationship (KC = 0.3618) where Ncalc=Dmeas*KC+1  

Calculated Properties of Pseudorutile

Electron Density: Bulk Density (Electron Density)=3.82 gm/cc
note: Specific Gravity of Pseudorutile =4.01 gm/cc.
Fermion Index: Fermion Index = 0.05
Boson Index = 0.95 Photoelectric: PE_Pseudorutile = 14.57 barns/electron
U=PE_Pseudorutile x rElectron Density= 55.60 barns/cc.
Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Pseudorutile is Not Radioactive  

Pseudorutile Classification

Dana Class: 08.04.02.01 (08)Multiple Oxides with Nb, Ta, and Ti   (08.04)with miscellaneous formulae   (08.04.02)Dana Group  

08.04.02.01 Pseudorutile Fe2Ti3O9 P 3₂2 3 2

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 Pseudorutile Information

References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) See Also: Links to other databases for Pseudorutile :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info
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