Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite).
Habit:
Encrustations - Forms crust-like aggregates on matrix.
Habit:
Platy - Sheet forms (e.g. micas).
Hardness:
2.5-3 - Finger Nail-Calcite
Luster:
Vitreous - Pearly
Streak:
white
Optical Properties of Lanthanite-(Nd)
Gladstone-Dale:
CI meas= -0.017 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= -0.014 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2052,KPDmeas= 0.2059,KC= 0.2025 Ncalc = 1.57
Estimated Radioactivity from Lanthanite-(Nd) - weak
Specimen Size Weight/Volume (Sphere) *
Calculated Activity Bequerols (Bq)
Calculated Activity Curies (Ci)
Estimated Activity GR(api)
Estimated Exposure (mRem**)/hr If Held in Hand For One Hour
1000 gm / 8.78 cm
1,049,606
2.84E-05
47,280.23
15.54
100 gm / 4.08 cm
104,961
2.84E-06
4,728.02
1.55
10 gm / 1.89 cm
10,496
2.84E-07
472.80
0.16
1 gm / 8.78 mm
1,050
2.84E-08
47.28
0.02
0.1 gm / 4.08 mm
105
2.84E-09
4.73
0.00
0.01 gm / 1.89 mm
10
2.84E-10
0.47
0.00
0.001 gm / 0.88 mm
1
2.84E-11
0.05
0.00
Weight of pure Lanthanite-(Nd) in grams (gm) and Calculated Diameter of a Sphere with a Density of 2.82 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 ( 2.34 % Th) From Sum REE Elements (46.86 % REE)
Chemical Formula: 
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- weak