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Physical Properties of Galena
Cleavage:
{001} Perfect, {010} Perfect, {100} Perfect
Color:
Light lead gray, Dark lead gray.
Density:
7.2 - 7.6, Average = 7.4
Diaphaneity:
Opaque
Fracture:
Brittle - Generally displayed by glasses and most non-metallic minerals.
Habit:
Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Habit:
Massive - Granular - Common texture observed in granite and other igneous rock.
Habit:
Massive - Uniformly indistinguishable crystals forming large masses.
Hardness:
2.5 - Finger Nail
Luminescence:
Non-fluorescent.
Luster:
Metallic
Magnetism:
Nonmagnetic
Streak:
grayish black
Optical Properties of Galena
RL Color:
White.
Reflectivity
Standardized Intensity (100%) Reflection Spectra of Galena in Air
λ
R
∑ R(λ)
400 nm
52.80
420 nm
50.50
440 nm
48.20
460 nm
46.40
480 nm
45.00
500 nm
43.90
520 nm
43.00
540 nm
42.40
560 nm
41.90
580 nm
41.60
600 nm
41.50
620 nm
41.60
640 nm
41.80
660 nm
41.90
680 nm
42.10
700 nm
42.20
Calculated Relative Intensity Colors of Galena in Air
Relative Intensity
0%
30%
60%
90%
100%
120%
150%
180%
210%
R
Calculated Properties of Galena
Electron Density:
Bulk Density (Electron Density)=6.23 gm/cc note: Specific Gravity of Galena =7.60 gm/cc.
Fermion Index:
Fermion Index = 0.19 Boson Index = 0.81
Photoelectric:
PEGalena =1,623.65 barns/electron U=PEGalena x rElectron Density=10108.40 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Galena is Not Radioactive
Galena Classification
Dana Class:
02.08.01.01(02)Sulfides - Including Selenides and Tellurides
Chemical Formula: 
