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Moore P B , Araki T , American Mineralogist , 64 (1979) p.390-401, Magnussonite, manganese arsenite, a fluorite derivative structure
Physical Properties of Magnussonite
Color:
Blue green, Grass green, Dark red.
Density:
4.3
Hardness:
3.5-4 - Copper Penny-Fluorite
Luster:
Vitreous (Glassy)
Streak:
white
Optical Properties of Magnussonite
Gladstone-Dale:
CI meas= -0.047 (Good) - where the CI = (1-KPDmeas/KC) CI calc= -0.055 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2295,KPDmeas= 0.2279,KC= 0.2176 Ncalc = 1.93 - 1.94
Optical Data:
Isotropic, n=1.98.
Calculated Properties of Magnussonite
Electron Density:
Bulk Density (Electron Density)=3.97 gm/cc note: Specific Gravity of Magnussonite =4.30 gm/cc.
Fermion Index:
Fermion Index = 0.0001127562 Boson Index = 0.9998872438
Photoelectric:
PEMagnussonite = 34.79 barns/electron U=PEMagnussonite x rElectron Density= 138.10 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Magnussonite is Not Radioactive
Magnussonite Classification
Dana Class:
46.01.03.01(46)Basic or Halogen-Containing Antimonites, Arsenites and Phosphites