Titanite Mineral Data

Titanite Mineral Data
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General Titanite Information

Help on Chemical Formula: Chemical Formula: CaTiSiO5
Help on Composition: Composition: Molecular Weight = 197.76 gm
   Calcium          19.25 %  Ca   26.94 % CaO
   La,Ce,Pr,Nd,Sm,   3.64 %  RE    4.25 % REE2O3
   Titanium         18.16 %  Ti   30.29 % TiO2
   Aluminum          2.73 %  Al    5.16 % Al2O3
   Iron              1.41 %  Fe    2.02 % Fe2O3
   Silicon          14.20 %  Si   30.38 % SiO2
   Oxygen           39.64 %  O
   Fluorine          0.96 %  F     0.96 % F
                      -   %   F    -0.40 % -O=F2    
                   ______        ______ 
                   100.00 %       99.60 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca0.95REE0.05Ti0.75Al0.2Fe3+0.05SiO4.9F0.1
Help on Environment: Environment: A common accessory mineral in intermediate and felsic plutonic rocks, pegmatites, and alpine veins. In gneisses, schists, and some skarns.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1795
Help on Locality: Locality: Passau, Bavaria, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its chemical composition of titanium.
Help on Name Pronunciation: Name Pronunciation: Titanite Say TITANITE
Help on Synonym: Synonym: Greenovite - Mn bearing
  Grothite - Al bearing
  ICSD 39870
  Keilhauite - REE bearing
  PDF 31-295
  Sphene
 

Titanite Image

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Titanite

Comments: Several twinned green crystals of Titanite (sphene) on matrix.
Location: Capelinha, Minas Gerais, Brazil. Scale: 5.5x5x3.5 cm.
© Isaias Casanova / IC Minerals
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Titanite   Amesite

Comments: Green titanite (sphene) crystals on purple chromamesite (clinochlore?).
Location: Saranovskaya Deposit, Middle Ural Mountains, Russia. Scale: Picture size 7 cm.
© Dave Barthelmy

Titanite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.7522:1:0.8532
Help on Cell Dimensions: Cell Dimensions: a = 6.56, b = 8.72, c = 7.44, Z = 4; beta = 119.716° V = 369.62 Den(Calc)= 3.55
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.233(1), 2.595(0.9), 2.989(0.9),
Help on Forms: Forms:

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

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Click Here for Large Titanite Structure Window Crystal Structure:

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Speer J A , Gibbs G V , American Mineralogist , 61 (1976) p.238-247, The crystal structure of synthetic titanite, CaTiOSiO4, and the domain textures, of natural titanites

View Additional jPOWD Structure files for Titanite
[1] [10] [100] [101] [102] [103] [104] [105] [106] [107] [108] [109] [11] [110] [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] [50] [51] [52] [53] [54] [55] [56] [57] [58] [59] [6] [60] [61] [62] [63] [64] [65] [66] [67] [68] [69] [7] [70] [71] [72] [73] [74] [75] [76] [77] [78] [79] [8] [80] [81] [82] [83] [84] [85] [86] [87] [88] [89] [9] [90] [91] [92] [93] [94] [95] [96] [97] [98] [99]
 

Physical Properties of Titanite

Help on Cleavage: Cleavage: {110} Distinct, {100} Imperfect, {112} Imperfect
Help on Color: Color: Reddish brown, Gray, Yellow, Green, Red.
Help on Density: Density: 3.4 - 3.56, Average = 3.48
Help on Diaphaneity: Diaphaneity: Transparent to translucent to opaque
Help on Fracture: Fracture: Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.
Help on Habit: Habit: Crystalline - Fine - Occurs as well-formed fine sized crystals.
Help on Habit: Habit: Massive - Lamellar - Distinctly foliated fine-grained forms.
Help on Hardness: Hardness: 5-5.5 - Apatite-Knife Blade
Help on Luminescence: Luminescence: Fluorescent, Short UV=weak brown.
Help on Luster: Luster: Adamantine - Resinous
Help on Streak: Streak: reddish white
 

Optical Properties of Titanite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.051 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.03 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2698,KPDmeas= 0.2752,KC= 0.2618
Ncalc = 1.89 - 1.93
Help on Optical Data: Optical Data: Biaxial (+), a=1.84-1.95, b=1.87-2.034, g=1.943-2.11, bire=0.1030-0.1600, 2V(Calc)=68-82, 2V(Meas)=20-56. Dispersion r > v extreme.
Help on Pleochroism (x): Pleochroism (x): colorless, greenish yellow, colorless, or yellowish brown.
Help on Pleochroism (y): Pleochroism (y): colorless, pink, greenish yellow, yellowish brown, or yellowish green.
 

Calculated Properties of Titanite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.47 gm/cc
note: Specific Gravity of Titanite =3.55 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PETitanite = 27.56 barns/electron
U=PETitanite x relectron= 95.53 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 3,805.78 (Gamma Ray American Petroleum Institute Units)
Concentration of Titanite per GRapi unit = 262.76 (PPM)

Titanite is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

Estimated Radioactivity from Titanite - mild
Specimen
Size
Weight/Volume
(Sphere) *		 Calculated
Activity
Becquerels
(Bq)		 Calculated
Activity
Curies (Ci)		 Estimated
Activity
GR(api)		 Estimated
Exposure
(mRem**)/hr
If Held in Hand
For One Hour
1000 gm / 8.13 cm 81,848 2.21E-06 3,805.78 1.25
100 gm / 3.78 cm 8,185 2.21E-07 380.58 0.13
10 gm / 1.75 cm 818 2.21E-08 38.06 0.01
1 gm / 8.13 mm 82 2.21E-09 3.81 0.00
0.1 gm / 3.78 mm 8 2.21E-10 0.38 0.00
0.01 gm / 1.75 mm 1 2.21E-11 0.04 0.00
0.001 gm / 0.81 mm 0 2.21E-12 0.00 0.00

Weight of pure Titanite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.55 gm/cc.*
Goverment Estimate of Average Annual Exposure ( 360 mRem) **
Note: 10 microsieverts/hr = 1 mRem/hr **
Max Permissable Adult Dose 50,000 mRem/yr (hands), 15,000 mRem/yr (eyes)
Lethal Dose LD(50) Exposure 400,000 to 500,000 mRem
Estimated Thorium Activity ( 0.18 % Th) From Sum REE Elements ( 3.64 % REE)
 

Titanite Classification
Help on Dana Class: Dana Class: 52.04.03.01 (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O
  (52.04)with cations in [6] and/or > [6] coordination
  (52.04.03)Titanite group
 
52.04.03.01 Titanite CaTiSiO5 P 21/a 2/m
 
52.04.03.02 Malayaite CaSnSiO5=CaSnOSiO4 A2/a 2/m
 
52.04.03.03 Vanadomalayaite CaVOSiO4 C 2/c 2/m
Help on Strunz Class: Strunz Class: 09.AG.15 09 - SILICATES (Germanates)
  09.A - Nesosilicates
  09.AG -Nesosilicates with additional anions; cations in > [6] ± [6] coordination
 
09.AG.15 Malayaite CaSnSiO5=CaSnOSiO4 A2/a 2/m
 
09.AG.15 Vanadomalayaite CaVOSiO4 C 2/c 2/m
 
09.AG.15 Titanite CaTiSiO5 P 21/a 2/m
 

Other Titanite Information
Help on See Also: See Also: Links to other databases for Titanite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Amethyst Galleries' Mineral Gallery
5 - Athena
6 - CalTech Mineral Spectroscopy
7 - EUROmin Project
8 - Ecole des Mines de Paris
9 - Franklin Minerals(Dunn)
10 - Franklin Minerals(Palache)
11 - GeoScienceWorld
12 - Glendale Community College
13 - Google Images
14 - Google Scholar
15 - Handbook of Mineralogy (MinSocAm)
16 - Handbook of Mineralogy (UofA)
17 - MinDAT
18 - Mineralienatlas (Deutsch)
19 - Minerals in Thin Section-University of North Carolina
20 - Minerals in Thin Sections-Humboldt State
21 - Online Mineral Museum
22 - QUT Mineral Atlas
23 - Ruff.Info
24 - Scandinavian mineral gallery
25 - Tradeshop.com - The Rainbow of Gems
26 - University of Colorado - Mineral Structure Data
27 - theimage

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Ask about Titanite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Titanite

CaTiSiO5
Dana No: 52.04.03.01 Strunz No: 09.AG.15
Locality:

 

Notes: