Brown, Brownish white, Colorless, Yellow, Golden brown.
Density:
1.55 - 1.65, Average = 1.6
Diaphaneity:
Transparent to Translucent
Fracture:
Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Habit:
Crystalline - Coarse - Occurs as well-formed coarse sized crystals.
Habit:
Massive - Granular - Common texture observed in granite and other igneous rock.
Hardness:
2-2.5 - Gypsum-Finger Nail
Luminescence:
Fluorescent and Phosphorescent, Short UV=blue, Long UV=blue.
Luster:
Vitreous (Glassy)
Streak:
white
Optical Properties of Mellite
Dichroism (e):
none.
Dichroism (w):
none.
Gladstone-Dale:
CI meas= -0.043 (Good) - where the CI = (1-KPDmeas/KC) CI calc= -0.314 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.4134,KPDmeas= 0.3281,KC= 0.3145 Ncalc = 1.4 - 1.52
Optical Data:
Uniaxial (-), e=1.511, w=1.539, bire=0.0280.
Calculated Properties of Mellite
Electron Density:
Bulk Density (Electron Density)=1.74 gm/cc note: Specific Gravity of Mellite =1.60 gm/cc.
Fermion Index:
Fermion Index = 0.0032386455 Boson Index = 0.9967613545
Photoelectric:
PEMellite = 0.49 barns/electron U=PEMellite x rElectron Density= 0.85 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Mellite is Not Radioactive
Chemical Formula: 
