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Physical Properties of Ancylite-(Ce)
Cleavage:
None
Color:
Brown, Brown red, Colorless, Gray, Gray pink.
Density:
3.9
Diaphaneity:
Transparent to translucent
Fracture:
Brittle - Generally displayed by glasses and most non-metallic minerals.
Habit:
Crystalline - Fine - Occurs as well-formed fine sized crystals.
Habit:
Pyramidal - Crystals are shaped like pyramids.
Hardness:
4.5 - Between Fluorite and Apatite
Luster:
Vitreous - Greasy
Streak:
white
Optical Properties of Ancylite-(Ce)
Gladstone-Dale:
CI meas= -0.015 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.025 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1691,KPDmeas= 0.1761,KC= 0.1735 Ncalc = 1.68 - 1.7
Estimated Exposure (mRem**)/hr If Held in Hand For One Hour
1000 gm / 7.88 cm
819,951
2.22E-05
35,701.95
11.74
100 gm / 3.66 cm
81,995
2.22E-06
3,570.19
1.17
10 gm / 1.70 cm
8,200
2.22E-07
357.02
0.12
1 gm / 7.88 mm
820
2.22E-08
35.70
0.01
0.1 gm / 3.66 mm
82
2.22E-09
3.57
0.00
0.01 gm / 1.70 mm
8
2.22E-10
0.36
0.00
0.001 gm / 0.79 mm
1
2.22E-11
0.04
0.00
Weight of pure Ancylite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.90 gm/cc.*
Goverment Estimate of Average Annual Exposure (
360 mRem)
** Note: 10 microsieverts/hr = 1 mRem/hr **
Max Permissable Adult Dose 50,000 mRem/yr (hands), 15,000 mRem/yr (eyes)
Lethal Dose LD(50) Exposure 400,000 to 500,000 mRem
Estimated Thorium Activity ( 1.83 % Th) From Sum REE Elements (36.60 % REE)
Chemical Formula: 
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