Titanite Mineral Data (original) (raw)
General Titanite Information
Chemical Formula:
CaTiSiO5
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
______ ______
100.00 % 99.60 % = TOTAL OXIDE
Empirical Formula:
Ca0.95REE0.05Ti0.75Al0.2Fe3+0.05SiO4.9F0.1
Environment:
A common accessory mineral in intermediate and felsic plutonic rocks, pegmatites, and alpine veins. In gneisses, schists, and some skarns.
IMA Status:
Valid Species (Pre-IMA) 1795
Locality:
Passau, Bavaria, Germany. Link to MinDat.org Location Data.
Name Origin:
Named after its chemical composition of titanium.
Name Pronunciation:
Titanite 
Synonym:
Greenovite - Mn bearing
Grothite - Al bearing
ICSD 39870
Keilhauite - REE bearing
PDF 31-295
Sphene
Titanite Image
Images:
Images:
 |
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
Axial Ratios:
a:b:c =0.7522:1:0.8532
Cell Dimensions:
a = 6.56, b = 8.72, c = 7.44, Z = 4; beta = 119.716° V = 369.62 Den(Calc)= 3.55
Crystal System:
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/a
X Ray Diffraction:
By Intensity(I/Io): 3.233(1), 2.595(0.9), 2.989(0.9),
Forms:
Mouse
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Drag2 - Resize
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| | Forms:( 1 1 0) ( 1 1 1) ( 0 0 1) Warning: this large pop-up is very compute intensive and may not work well with some computers. | | --------------------------------------------------------------------------------------------------------------------------------------------------- |
Crystal Structure:
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drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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Physical Properties of Titanite
Cleavage:
{110} Distinct, {100} Imperfect, {112} Imperfect
Color:
Reddish brown, Gray, Yellow, Green, Red.
Density:
3.4 - 3.56, Average = 3.48
Diaphaneity:
Transparent to translucent to opaque
Fracture:
Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.
Habit:
Crystalline - Fine - Occurs as well-formed fine sized crystals.
Habit:
Massive - Lamellar - Distinctly foliated fine-grained forms.
Hardness:
5-5.5 - Apatite-Knife Blade
Luminescence:
Fluorescent, Short UV=weak brown.
Luster:
Adamantine - Resinous
Streak:
reddish white
Optical Properties of Titanite
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
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.
Pleochroism (x):
colorless, greenish yellow, colorless, or yellowish brown.
Pleochroism (y):
colorless, pink, greenish yellow, yellowish brown, or yellowish green.
Calculated Properties of Titanite
Electron Density:
Bulk Density (Electron Density)=3.47 gm/cc
note: Specific Gravity of Titanite =3.55 gm/cc.
Fermion Index:
Fermion Index = 0.03
Boson Index = 0.97
Photoelectric:
PETitanite = 27.56 barns/electron
U=PETitanite x relectron= 95.53 barns/cc.
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
| SpecimenSizeWeight/Volume(Sphere) * | CalculatedActivityBecquerels(Bq) | CalculatedActivityCuries (Ci) | EstimatedActivityGR(api) | EstimatedExposure(mRem**)/hrIf Held in HandFor 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
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
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
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 :
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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: