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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.
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
Specimen Size Weight/Volume (Sphere) *
Calculated Activity Bequerols (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
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
Chemical Formula: 
- mild