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Rastsvetaeva R K , Khomyakov A P , Crystallography Reports , 46 (2001) p.752-757, Modular structure of a sodium-rich analogue of eudialyte with, the doubled c-parameter and the R3 symmetry, Locality: Eveslogchorr mountain
Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Luster:
Vitreous (Glassy)
Streak:
white
Optical Properties of Labyrinthite
Gladstone-Dale:
CI meas= 0.008 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= -0.002 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2102,KPDmeas= 0.208,KC= 0.2097 Ncalc = 1.6
Optical Data:
Uniaxial (+), w=1.597, e=1.601, bire=0.0040.
Calculated Properties of Labyrinthite
Electron Density:
Bulk Density (Electron Density)=2.79 gm/cc note: Specific Gravity of Labyrinthite =2.85 gm/cc.
Fermion Index:
Fermion Index = 0.02 Boson Index = 0.98
Photoelectric:
PELabyrinthite = 17.01 barns/electron U=PELabyrinthite x relectron= 47.48 barns/cc.
Radioactivity:
GRapi = 252.77 (Gamma Ray American Petroleum Institute Units)
Concentration of Labyrinthite per GRapi unit = 0.40 (%)
Estimated Radioactivity from Labyrinthite - barely detectable