Constituent in a layered iron silicate-quartz-apatite body in gneisses, probably a shaly and phosphatic iron formation metamorphosed to the granulite facies.
IMA Status:
Approved IMA 1993 (Dana # Added)
Locality:
Arcedeckne Island, near the Boothia Peninsula, District of Franklin, Arctic Canada. Link to MinDat.org Location Data.
Name Origin:
Named for James Merritt Harrison (1915-1990), tth former director of the Canadian Geological Service.
Anhedral Grains - Granular minerals without the expression of crystal shapes
Habit:
Selvage - As a reaction rim, surrounding the host mineral.
Hardness:
4-5 - Fluorite-Apatite
Luster:
Vitreous (Glassy)
Streak:
light yellow
Optical Properties of Harrisonite
Dichroism (e):
pale yellow.
Dichroism (w):
paler yellow.
Gladstone-Dale:
CI meas= 0.014 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.016 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1897,KPDmeas= 0.1902,KC= 0.1929 Ncalc = 1.78
Optical Data:
Uniaxial (-), e=1.759, w=1.77, bire=0.0110.
Calculated Properties of Harrisonite
Electron Density:
Bulk Density (Electron Density)=3.89 gm/cc note: Specific Gravity of Harrisonite =4.02 gm/cc.
Fermion Index:
Fermion Index = 0.01 Boson Index = 0.99
Photoelectric:
PEHarrisonite = 13.79 barns/electron U=PEHarrisonite x rElectron Density= 53.70 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Harrisonite is Not Radioactive
Harrisonite Classification
Dana Class:
53.02.03.01(53)Nesosilicate Insular SiO4 Groups and Other Anions of Complex Cations
Chemical Formula: 
