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Physical Properties of Frankhawthorneite
Cleavage:
None
Color:
Medium leaf green.
Density:
5.44
Diaphaneity:
Transparent
Fracture:
Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Habit:
Bladed - Aggregates of thin lath-like crystals (e.g. kyanite).
Habit:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Hardness:
3-3.5 - Calcite-Copper Penny
Luminescence:
Non-fluorescent.
Luster:
Vitreous (Glassy)
Streak:
light leaf green
Optical Properties of Frankhawthorneite
Gladstone-Dale:
CI meas= 0.006 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.005 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1842,KPDmeas= 0.1838,KC= 0.185 Ncalc = 2 - 2.01
Optical Data:
Biaxial (?), b=2
RL Anisotrophism:
Weak, somber brown.
RL Bireflectance:
Weak.
RL Color:
Pale gray with viridian-green internal reflections.
Reflectivity
Standardized Intensity (100%) Reflection Spectra of Frankhawthorneite in Air
λ
R1
R2
∑ R1(λ)
∑ R2(λ)
400 nm
12.60
14.20
420 nm
12.30
13.70
440 nm
12.00
13.30
460 nm
11.70
12.90
480 nm
11.40
12.60
500 nm
11.20
12.40
520 nm
11.00
12.20
540 nm
10.90
12.00
560 nm
10.70
11.90
580 nm
10.60
11.70
600 nm
10.50
11.60
620 nm
10.40
11.40
640 nm
10.30
11.30
660 nm
10.20
11.20
680 nm
10.10
11.20
700 nm
10.10
11.20
Calculated Relative Intensity Colors of Frankhawthorneite in Air
Relative Intensity
0%
90%
100%
180%
270%
360%
450%
540%
630%
720%
810%
830%
R1
R2
Calculated Properties of Frankhawthorneite
Electron Density:
Bulk Density (Electron Density)=4.93 gm/cc note: Specific Gravity of Frankhawthorneite =5.43 gm/cc.
Fermion Index:
Fermion Index = 0.02 Boson Index = 0.98
Photoelectric:
PEFrankhawthorneite = 139.10 barns/electron U=PEFrankhawthorneite x rElectron Density= 685.30 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Frankhawthorneite is Not Radioactive
Chemical Formula: 
