Filling interstices between large crystals of anorthoclase in alkalic pegmatites.
IMA Status:
Approved IMA 1975 ( Dana # Added)
Locality:
On Mt. Koashva, Khibiny massif, and Mt. Karnasurt, Lovozero massif, Kola Peninsula, Russia. At Mont Saint-Hilaire, Quebec, Canada. Link to MinDat.org Location Data.
Name Origin:
For PHOsphorus, SIlicon, and sodium, NAtrium, in the composition.
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McDonald A M , Chao G Y , The Canadian Mineralogist , 34 (1996) p.107-114, Phosinaite-(Ce) from Mont Saint-Hilaire, Quebec: New data and structure refinement, Locality: Mont Saint-Hilaire, Quebec, Canada
Physical Properties of Phosinaite-(Ce)
Cleavage:
{100} Perfect, {010} Indistinct, {110} Indistinct
Color:
Colorless, Pink, Light brown.
Density:
2.97
Diaphaneity:
Transparent
Habit:
Columnar - Forms columns
Hardness:
3.5 - Copper Penny
Luster:
Vitreous (Glassy)
Streak:
white
Optical Properties of Phosinaite-(Ce)
Gladstone-Dale:
CI meas= -0.021 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= 0.009 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1858,KPDmeas= 0.1915,KC= 0.1875 Ncalc = 1.56 - 1.57
Bulk Density (Electron Density)=2.95 gm/cc note: Specific Gravity of Phosinaite-(Ce) =3.06 gm/cc.
Fermion Index:
Fermion Index = 0.0046283923 Boson Index = 0.9953716077
Photoelectric:
PEPhosinaite-(Ce) = 57.77 barns/electron U=PEPhosinaite-(Ce) x relectron= 170.70 barns/cc.
Radioactivity:
GRapi = 11,993.05 (Gamma Ray American Petroleum Institute Units)
Concentration of Phosinaite-(Ce) per GRapi unit = 83.38 (PPM)
Phosinaite-(Ce) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.
Estimated Radioactivity from Phosinaite-(Ce) - weak
Specimen Size Weight/Volume (Sphere) *
Calculated Activity Becquerels (Bq)
Calculated Activity Curies (Ci)
Estimated Activity GR(api)
Estimated Exposure (mRem**)/hr If Held in Hand For One Hour
1000 gm / 8.55 cm
260,818
7.05E-06
11,993.05
3.94
100 gm / 3.97 cm
26,082
7.05E-07
1,199.30
0.39
10 gm / 1.84 cm
2,608
7.05E-08
119.93
0.04
1 gm / 8.55 mm
261
7.05E-09
11.99
0.00
0.1 gm / 3.97 mm
26
7.05E-10
1.20
0.00
0.01 gm / 1.84 mm
3
7.05E-11
0.12
0.00
0.001 gm / 0.85 mm
0
7.05E-12
0.01
0.00
Weight of pure Phosinaite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.06 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 ( 0.58 % Th) From Sum REE Elements (11.64 % REE)