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Splintery - Thin, elongated fractures produced by intersecting good cleavages or partings (e.g. hornblende).
Habit:
Massive - Granular - Common texture observed in granite and other igneous rock.
Habit:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Habit:
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Hardness:
4-5 - Fluorite-Apatite
Luminescence:
Non-fluorescent.
Luster:
Vitreous - Greasy
Streak:
white
Optical Properties of Xenotime-(Y)
Dichroism (e):
pink, yellow, or yellow brown.
Dichroism (w):
brownish yellow, grayish brown, or greenish.
Gladstone-Dale:
CI meas= 0.076 (Fair) - where the CI = (1-KPDmeas/KC) CI calc= -0.028 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.18,KPDmeas= 0.1618,KC= 0.175 Ncalc = 1.75 - 1.89
Optical Data:
Uniaxial (+), w=1.721, e=1.816, bire=0.0950.
Calculated Properties of Xenotime-(Y)
Electron Density:
Bulk Density (Electron Density)=3.99 gm/cc note: Specific Gravity of Xenotime-(Y) =4.27 gm/cc.
Fermion Index:
Fermion Index = 0.0001670617 Boson Index = 0.9998329383
Photoelectric:
PEXenotime-(Y) = 61.49 barns/electron U=PEXenotime-(Y) x rElectron Density= 245.62 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Xenotime-(Y) is Not Radioactive
Chemical Formula: 
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