Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Habit:
Inclusions - Generally found as inclusions in other minerals.
Hardness:
6.5 - Pyrite
Luster:
Adamantine - Metallic
Optical Properties of Srilankite
Gladstone-Dale:
CI meas= 0.126 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= 0.092 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.3007,KPDmeas= 0.2896,KC= 0.3312 Ncalc = 2.52 - 2.58
Optical Data:
Biaxial (-), a=2.38, 2V(Meas)=16. Dispersion high birefringence.
Pleochroism (x):
dark blue.
RL Anisotrophism:
Observed.
RL Color:
Gray-white.
Reflectivity
Standardized Intensity (100%) Reflection Spectra of Srilankite in Air
λ
R1
R2
∑ R1(λ)
∑ R2(λ)
480 nm
19.40
18.60
546 nm
18.40
16.00
589 nm
18.50
16.40
649 nm
18.70
17.00
Calculated Relative Intensity Colors of Srilankite in Air
Relative Intensity
0%
60%
100%
120%
180%
240%
300%
360%
420%
480%
530%
R1
R2
Calculated Properties of Srilankite
Electron Density:
Bulk Density (Electron Density)=4.30 gm/cc note: Specific Gravity of Srilankite =4.59 gm/cc.
Fermion Index:
Fermion Index = 0.07 Boson Index = 0.93
Photoelectric:
PESrilankite = 41.20 barns/electron U=PESrilankite x rElectron Density= 177.21 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Srilankite is Not Radioactive
Chemical Formula: 
