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Ghose S , Wan C , American Mineralogist , 63 (1978) p.304-310, Zektzerite, NaLiZrSi6O15: a silicate with six-tetrahedral-repeat double chains, Locality: Miarolitic cavities of the Golden Horn batholith, near Washington Pass, North Cascades, Washington, USA
Physical Properties of Zektzerite
Cleavage:
{100} Perfect, {010} Perfect
Color:
Colorless, Pink.
Density:
2.79
Diaphaneity:
Transparent
Hardness:
6 - Orthoclase
Luminescence:
Fluorescent, Short UV=light yellow.
Luster:
Vitreous - Pearly
Streak:
white
Optical Properties of Zektzerite
Gladstone-Dale:
CI meas= 0.006 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.003 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2098,KPDmeas= 0.2091,KC= 0.2104 Ncalc = 1.59
Optical Data:
Biaxial (-), a=1.582, b=1.584, g=1.584, bire=0.0020, 2V(Calc)=0, 2V(Meas)=0. Dispersion r > v weak.
Pleochroism (x):
colorless.
Pleochroism (y):
colorless.
Pleochroism (z):
colorless.
Calculated Properties of Zektzerite
Electron Density:
Bulk Density (Electron Density)=2.71 gm/cc note: Specific Gravity of Zektzerite =2.78 gm/cc.
Fermion Index:
Fermion Index = 0.03 Boson Index = 0.97
Photoelectric:
PEZektzerite = 24.04 barns/electron U=PEZektzerite x rElectron Density= 65.12 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Zektzerite is Not Radioactive