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Rouse R C , Peacor D R , American Mineralogist , 79 (1994) p.175-184, Maricopaite, an unusual lead calcium zeolite with an interrupted mordenite-like, framework and intrachannel Pb4 tetrahedral clusters
Physical Properties of Maricopaite
Cleavage:
{010} Imperfect
Color:
White.
Density:
2.94
Diaphaneity:
Translucent
Fracture:
Friable - The crumbly disintegration of earthy materials or highly fractured minerals.
Habit:
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Hardness:
1-1.5 - Talc or a little harder
Luster:
Vitreous - Silky
Streak:
white
Optical Properties of Maricopaite
Gladstone-Dale:
CI meas= 0.01 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.006 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1976,KPDmeas= 0.1969,KC= 0.1988 Ncalc = 1.58
Optical Data:
Biaxial (-), a=1.563, b=1.582, g=1.592, bire=0.0290, 2V(Calc)=70, 2V(Meas)=70. Dispersion r > v strong.
Calculated Properties of Maricopaite
Electron Density:
Bulk Density (Electron Density)=2.78 gm/cc note: Specific Gravity of Maricopaite =2.93 gm/cc.
Fermion Index:
Fermion Index = 0.07 Boson Index = 0.93
Photoelectric:
PEMaricopaite = 475.84 barns/electron U=PEMaricopaite x rElectron Density=1,322.29 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Maricopaite is Not Radioactive