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Physical Properties of Apatite
Cleavage:
{0001} Indistinct, {1010} Indistinct
Color:
White, Yellow, Green, Red, Blue.
Density:
3.16 - 3.22, Average = 3.19
Diaphaneity:
Transparent to translucent
Fracture:
Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Habit:
Colloform - Forming from a gel or colloidal mass.
Habit:
Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).
Habit:
Massive - Granular - Common texture observed in granite and other igneous rock.
Hardness:
5 - Apatite
Luminescence:
Non-fluorescent.
Luster:
Vitreous (Glassy)
Streak:
white
Optical Properties of Apatite
Gladstone-Dale:
CI meas= 0.021 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= 0.03 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1961,KPDmeas= 0.198,KC= 0.2021 Ncalc = 1.64 - 1.65
Optical Data:
Uniaxial (-), e=1.63, w=1.633, bire=0.0030.
Calculated Properties of Apatite
Electron Density:
Bulk Density (Electron Density)=3.17 gm/cc note: Specific Gravity of Apatite =3.19 gm/cc.
Fermion Index:
Fermion Index = 0.0007174973 Boson Index = 0.9992825027
Photoelectric:
PEApatite = 5.87 barns/electron U=PEApatite x rElectron Density= 18.59 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Apatite is Not Radioactive
Apatite Classification
Dana Class:
41.08.01.00(41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
Chemical Formula: 
