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Physical Properties of Bravoite
Cleavage:
None
Color:
Steel gray.
Density:
5 - 5.02, Average = 5.01
Diaphaneity:
Opaque
Fracture:
Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Habit:
Druse - Crystal growth in a cavity which results in numerous crystal tipped surfaces.
Habit:
Stalactitic - Shaped like pendant columns as stalactites or stalagmites (e.g. calcite).
Habit:
Striated - Parallel lines on crystal surface or cleavage face.
Hardness:
6.5 - Pyrite
Luster:
Metallic
Streak:
black
Optical Properties of Bravoite
Reflectivity
Standardized Intensity (100%) Reflection Spectra of Bravoite in Air
λ
R
∑ R(λ)
400 nm
36.20
420 nm
35.60
440 nm
35.00
460 nm
34.60
480 nm
34.70
500 nm
35.00
520 nm
35.60
540 nm
36.30
560 nm
36.80
580 nm
37.40
600 nm
38.00
620 nm
38.70
640 nm
39.40
660 nm
40.20
680 nm
40.80
700 nm
41.20
Calculated Relative Intensity Colors of Bravoite in Air
Relative Intensity
0%
30%
60%
90%
100%
120%
150%
180%
210%
240%
250%
R
Calculated Properties of Bravoite
Electron Density:
Bulk Density (Electron Density)=4.47 gm/cc note: Specific Gravity of Bravoite =4.62 gm/cc.
Fermion Index:
Fermion Index = 0.01 Boson Index = 0.99
Photoelectric:
PEBravoite = 18.13 barns/electron U=PEBravoite x rElectron Density= 81.10 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Bravoite is Not Radioactive
Chemical Formula: 
