Phosinaite-(Ce) Mineral Data

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General Phosinaite-(Ce) Information

Chemical Formula:

Na13Ca2Ce[Si4O12](PO4)4

Composition:

Molecular Weight = 1,203.36 gm

Sodium 24.84 % Na 33.48 % Na₂O

Calcium 6.66 % Ca 9.32 % CaO

Cerium 11.64 % Ce 13.64 % Ce₂O₃

Silicon 9.34 % Si 19.97 % SiO₂

Phosphorus 10.30 % P 23.59 % P₂O₅

Oxygen 37.23 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₁₃Ca₂CeSi₄O₁₂(PO₄)₄

Environment:

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.

Name Pronunciation:

Phosinaite-(Ce) + Pronunciation

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Phosinaite-(Ce) Crystallography

Axial Ratios:

a:b:c =0.8388:1:0.4942

Cell Dimensions:

a = 12.297, b = 14.66, c = 7.245, Z = 2; V = 1,306.09 Den(Calc)= 3.06

Crystal System:

Orthorhombic - DisphenoidalH-M Symbol (2 2 2) Space Group: P 22121

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.74(1), 7.44(0.55), 2.566(0.53),6.92(0.5), 3.51(0.4), 3.94(0.2),

Crystal Structure:

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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

Optical Data:

Biaxial (-), a=1.567, b=1.569, g=1.57, bire=0.0030, 2V(Calc)=70, 2V(Meas)=68.

Calculated Properties of Phosinaite-(Ce)

Electron Density:

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:

PE_{Phosinaite-(Ce)}= 57.77 barns/electron
U=PE_{Phosinaite-(Ce)} x r_electron= 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 Bequerols (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)

Phosinaite-(Ce) Classification

Dana Class:

60.02.02.01 (60)Cyclosilicate Four-Membered Rings

(60.02)with other anion groups

(60.02.02)Dana Group

60.02.02.01 Phosinaite-(Ce)! Na13Ca2Ce[Si4O12](PO4)4 P 22121 2 2 2

Strunz Class:

09.CF.15 09 - SILICATES (Germanates)

09.C - Cyclosilicates

09.CF -[Si4O12]8- 4-membered single rings, with insular complex anions

09.CF.15 Clinophosinaite! Na3CaPSiO7 P 2/c 2/m

09.CF.15 Phosinaite-(Ce)! Na13Ca2Ce[Si4O12](PO4)4 P 22121 2 2 2

Other Phosinaite-(Ce) Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Am.Min.,Vol.81,p1286,1996) OPTIC PROP.(Am.Min.,Vol.81,p1286,1996)

See Also:

Links to other databases for Phosinaite-(Ce) :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - Google Images
6 - Google Scholar
7 - MinDAT
8 - MinMax(Deutsch)
9 - MinMax(English)
10 - Mineralienatlas (Deutsch)
11 - QUT Mineral Atlas
12 - Ruff.Info
13 - Uranium Minerals
14 - WWW-MINCRYST

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Phosinaite-(Ce)

Na13Ca2Ce[Si4O12](PO4)4
Dana No: 60.02.02.01 Strunz No: 09.CF.15
Locality:

Notes: