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Newnham R E , de Haan Y M , Zeitschrift fur Kristallographie , 117 (1962) p.235-237, Refinement of the alpha Al2O3, Ti2O3, V2O3 and Cr2O3 structures, Locality: synthetic
Physical Properties of Karelianite
Cleavage:
None
Color:
Black.
Density:
4.87
Diaphaneity:
Opaque
Fracture:
Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Habit:
Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Habit:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Hardness:
8-9
Luster:
Metallic
Streak:
black
Optical Properties of Karelianite
Optical Data:
Uniaxial (?).
NCalc= 2.38 - from Gladstone-Dale relationship (KC = 0.279) where Ncalc=Dcalc*KC+1 NCalc= 2.36 - from Gladstone-Dale relationship (KC = 0.279) where Ncalc=Dmeas*KC+1
RL Anisotrophism:
Strong, reddish brown to gray.
RL Bireflectance:
Weak.
RL Color:
Brownish olive-gray.
Reflectivity
Standardized Intensity (100%) Reflection Spectra of Karelianite in Air
λ
R
∑ R(λ)
400 nm
14.30
420 nm
14.40
440 nm
14.50
460 nm
14.80
480 nm
15.20
500 nm
15.80
520 nm
16.30
540 nm
16.80
560 nm
17.20
580 nm
17.60
600 nm
18.00
620 nm
18.30
640 nm
18.70
660 nm
19.20
680 nm
19.80
700 nm
20.60
Calculated Relative Intensity Colors of Karelianite in Air
Relative Intensity
0%
60%
100%
120%
180%
240%
300%
360%
420%
480%
540%
600%
R
Calculated Properties of Karelianite
Electron Density:
Bulk Density (Electron Density)=4.62 gm/cc note: Specific Gravity of Karelianite =4.95 gm/cc.
Fermion Index:
Fermion Index = 0.0018531119 Boson Index = 0.9981468881
Photoelectric:
PEKarelianite = 13.27 barns/electron U=PEKarelianite x rElectron Density= 61.35 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Karelianite is Not Radioactive