Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite).
Habit:
Platy - Sheet forms (e.g. micas).
Hardness:
2-2.5 - Gypsum-Finger Nail
Luminescence:
Non-fluorescent.
Luster:
Adamantine
Streak:
dark red
Optical Properties of Parkinsonite
Dichroism (e):
greenish yellow.
Dichroism (w):
brownish red.
Gladstone-Dale:
CI meas= -0.511 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= -0.409 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1911,KPDmeas= 0.2049,KC= 0.1356 Ncalc = 1.99 - 2.06
Optical Data:
Uniaxial (-), e=2.42, w=2.58, bire=0.1600.
RL Anisotrophism:
Weak to moderate.
RL Bireflectance:
Moderate.
RL Color:
Gray with deep red to red-orange internal reflections.
Reflectivity
Standardized Intensity (100%) Reflection Spectra of Parkinsonite in Air
λ
R1
R2
∑ R1(λ)
∑ R2(λ)
400 nm
22.60
21.80
420 nm
22.40
21.20
440 nm
22.30
20.50
460 nm
22.20
19.90
480 nm
21.90
19.40
500 nm
21.60
18.90
520 nm
21.20
18.50
540 nm
20.60
18.10
560 nm
20.20
17.80
580 nm
19.80
17.50
600 nm
19.40
17.20
620 nm
19.10
17.10
640 nm
18.90
17.00
660 nm
18.70
16.90
680 nm
18.60
16.70
700 nm
18.50
16.70
Calculated Relative Intensity Colors of Parkinsonite in Air
Relative Intensity
0%
50%
100%
150%
200%
250%
300%
350%
400%
450%
500%
R1
R2
Calculated Properties of Parkinsonite
Electron Density:
Bulk Density (Electron Density)=6.41 gm/cc note: Specific Gravity of Parkinsonite =7.85 gm/cc.
Fermion Index:
Fermion Index = 0.19 Boson Index = 0.81
Photoelectric:
PEParkinsonite =1,612.04 barns/electron U=PEParkinsonite x rElectron Density=10333.73 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Parkinsonite is Not Radioactive
Chemical Formula: 
