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Physical Properties of Hausmannite
Cleavage:
{001} Perfect
Color:
Brownish black, Grayish.
Density:
4.7 - 4.84, Average = 4.76
Diaphaneity:
Opaque
Fracture:
Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Habit:
Massive - Granular - Common texture observed in granite and other igneous rock.
Habit:
Pseudo Octohedral - Crystals show an octohedral outline.
Hardness:
5.5 - Knife Blade
Luminescence:
Non-fluorescent.
Luster:
Sub Metallic
Magnetism:
Nonmagnetic
Streak:
dark reddish brown
Optical Properties of Hausmannite
Dichroism (e):
dark gray.
Dichroism (w):
light gray.
Gladstone-Dale:
CI meas= 0.122 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= 0.136 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2691,KPDmeas= 0.2736,KC= 0.3115 Ncalc = 2.46 - 2.51
Optical Data:
Uniaxial (-), e=2.15, w=2.46, bire=0.3100.
RL Anisotrophism:
Distinct.
RL Bireflectance:
Weak.
RL Color:
Gray, with deep blood red to reddish brown internal reflections.
Reflectivity
Standardized Intensity (100%) Reflection Spectra of Hausmannite in Air
λ
R1
R2
∑ R1(λ)
∑ R2(λ)
400 nm
21.50
18.80
420 nm
21.20
18.40
440 nm
20.90
17.90
460 nm
20.70
17.50
480 nm
20.50
17.20
500 nm
20.40
17.00
520 nm
20.40
16.70
540 nm
20.30
16.40
560 nm
20.10
16.10
580 nm
20.10
15.90
600 nm
20.00
15.70
620 nm
19.90
15.50
640 nm
19.90
15.40
660 nm
19.80
15.20
680 nm
19.80
15.10
700 nm
19.70
14.90
Calculated Relative Intensity Colors of Hausmannite in Air
Relative Intensity
0%
60%
100%
120%
180%
240%
300%
360%
420%
480%
540%
560%
R1
R2
Calculated Properties of Hausmannite
Electron Density:
Bulk Density (Electron Density)=4.46 gm/cc note: Specific Gravity of Hausmannite =4.77 gm/cc.
Fermion Index:
Fermion Index = 0.0001342538 Boson Index = 0.9998657462
Photoelectric:
PEHausmannite = 19.02 barns/electron U=PEHausmannite x rElectron Density= 84.86 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Hausmannite is Not Radioactive
Chemical Formula: 
