Irregular Grains - Occurs as splotchy, anhedral crystals forming inclusions in other minerals or rocks.
Habit:
Microscopic Crystals - Crystals visible only with microscopes.
Habit:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Hardness:
3 - Calcite
Luster:
Vitreous (Glassy)
Streak:
white
Optical Properties of Remondite-(La)
Gladstone-Dale:
CI meas= 0.01 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= -0.025 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.183,KPDmeas= 0.1768,KC= 0.1785 Ncalc = 1.6 - 1.62
Estimated Radioactivity from Remondite-(La) - 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 / 8.17 cm
739,775
2.00E-05
32,857.98
10.80
100 gm / 3.79 cm
73,978
2.00E-06
3,285.80
1.08
10 gm / 1.76 cm
7,398
2.00E-07
328.58
0.11
1 gm / 8.17 mm
740
2.00E-08
32.86
0.01
0.1 gm / 3.79 mm
74
2.00E-09
3.29
0.00
0.01 gm / 1.76 mm
7
2.00E-10
0.33
0.00
0.001 gm / 0.82 mm
1
2.00E-11
0.03
0.00
Weight of pure Remondite-(La) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.50 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 ( 1.65 % Th) From Sum REE Elements (33.03 % REE)
Chemical Formula: 
- weak