Metamict - Mineral originally crystalline, now amorphous due to radiation damage.
Hardness:
5 - Apatite
Luster:
Sub Metallic
Streak:
greenish gray
Optical Properties of Loranskite-(Y)
Optical Data:
NCalc= 1.79 - from Gladstone-Dale relationship (KC = 0.1715) where Ncalc=Dmeas*KC+1
Calculated Properties of Loranskite-(Y)
Electron Density:
Bulk Density (Electron Density)=4.03 gm/cc note: Specific Gravity of Loranskite-(Y) =4.60 gm/cc.
Fermion Index:
Fermion Index = 0.02 Boson Index = 0.98
Photoelectric:
PELoranskite-(Y) = 560.07 barns/electron U=PELoranskite-(Y) x relectron=2,256.85 barns/cc.
Radioactivity:
GRapi = 2,819.31 (Gamma Ray American Petroleum Institute Units)
Concentration of Loranskite-(Y) per GRapi unit = 354.70 (PPM)
Estimated Radioactivity from Loranskite-(Y) - mild
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 / 7.46 cm
67,586
1.83E-06
2,819.31
0.93
100 gm / 3.46 cm
6,759
1.83E-07
281.93
0.09
10 gm / 1.61 cm
676
1.83E-08
28.19
0.01
1 gm / 7.46 mm
68
1.83E-09
2.82
0.00
0.1 gm / 3.46 mm
7
1.83E-10
0.28
0.00
0.01 gm / 1.61 mm
1
1.83E-11
0.03
0.00
0.001 gm / 0.75 mm
0
1.83E-12
0.00
0.00
Weight of pure Loranskite-(Y) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.60 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 ( 0.15 % Th) From Sum REE Elements ( 3.02 % REE)
Loranskite-(Y) Classification
Dana Class:
08.01.05.01(08)Multiple Oxides with Nb, Ta, and Ti
Chemical Formula: 
- mild