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Fleet M E , Liu X , Pan Y , American Mineralogist , 85 (2000) p.1437-1446, Rare-earth elements in chlorapatite [Ca10(PO4)6(Cl)2]:, Uptake, site preference, and degradation of monoclinic structure, Sample: La-ClAp
Massive - Uniformly indistinguishable crystals forming large masses.
Hardness:
5 - Apatite
Luminescence:
Fluorescent.
Luster:
Vitreous - Dull
Streak:
white
Optical Properties of Apatite-(CaCl)
Dichroism (e):
colorless.
Dichroism (w):
colorless.
Gladstone-Dale:
CI meas= -0.018 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= -0.002 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2098,KPDmeas= 0.2131,KC= 0.2094 Ncalc = 1.65 - 1.67
Optical Data:
Uniaxial (-), e=1.6675, w=1.675, bire=0.0075.
Calculated Properties of Apatite-(CaCl)
Electron Density:
Bulk Density (Electron Density)=3.17 gm/cc note: Specific Gravity of Apatite-(CaCl) =3.20 gm/cc.
Fermion Index:
Fermion Index = 0.0006964538 Boson Index = 0.9993035462
Photoelectric:
PEApatite-(CaCl) = 6.03 barns/electron U=PEApatite-(CaCl) x rElectron Density= 19.13 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Apatite-(CaCl) is Not Radioactive
Apatite-(CaCl) Classification
Dana Class:
41.08.01.02(41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen