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Petersenite-(Ce) Mineral Data

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General Petersenite-(Ce) Information

Help on Chemical  Formula: Chemical Formula: (Na,Ca)4(Ce,La,Nd)2(CO3)5
Help on Composition: Composition: Molecular Weight = 672.29 gm
   Sodium         12.65 %  Na   17.06 % Na2O
   Strontium       1.30 %  Sr    1.54 % SrO
   Calcium         1.79 %  Ca    2.50 % CaO
   Lanthanum      12.40 %  La   14.54 % La2O3
   Cerium         20.84 %  Ce   24.41 % Ce2O3
   Praeseodymium   2.10 %  Pr    2.45 % Pr2O3
   Carbon          8.93 %  C    32.73 % CO2
   Neodymium       4.29 %  Nd    5.00 % Nd2O3
   Oxygen         35.70 %  O
                 ______        ______ 
                 100.00 %      100.24 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na3.7Ca0.3CeLa0.6Nd0.2Sr0.1Pr0.1(CO3)5
Help on Environment: Environment: Rare accessory mineral in pegmatites in nepheline-sodalite syenites near a hornfels contact.
Help on IMA Status: IMA Status: Approved IMA 1994
Help on Locality: Locality: Mont Saint-Hilaire, Quebec, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Ole Valdemar Petersen (1939-), Curator, Geology Museum, Copenhagen, Denmark.
Help on Name Pronunciation: Name Pronunciation: Petersenite-(Ce) + Pronunciation Say PETERSENITE-(CE)
Help on Synonym: Synonym: ICSD 79144
  IMA1992-048
  PDF 46-1471
 

Petersenite-(Ce) Image

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  Petersenite-(Ce)

Comments: Reddish brown specks of petersenite-(Ce) in matrix.
Location: Mt. St. Hilaire, Quebec, Canada. Scale: Box Size 4 x 6 cm.
© Sonke Stolze / Systematic Minerals

Petersenite-(Ce) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =3.2695:1:1.6595
Help on Cell Dimensions: Cell Dimensions: a = 20.84, b = 6.374, c = 10.578, Z = 4; beta = 120.43° V = 1,211.56 Den(Calc)= 3.69
Help on Crystal System: Crystal System: Monoclinic - Sphenoidal H-M Symbol (2) Space Group: P 21
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.607(1), 5.22(0.5), 3.7(0.4),1.921(0.3), 2.148(0.3), 4.13(0.3), 9.13(0.3),
 

Physical Properties of Petersenite-(Ce)

Help on Cleavage: Cleavage: None
Help on Color: Color: Light violet, Light yellow, Pink gray, Reddish gray.
Help on Density: Density: 3.69
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Petersenite-(Ce)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.02 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.02 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1724,KPDmeas= 0.1724,KC= 0.1759
Ncalc = 1.65
Help on Optical Data: Optical Data: Biaxial (+/-), a=1.623, b=1.636, g=1.649, bire=0.0260, 2V(Calc)=88, 2V(Meas)=89.7-90.
 

Calculated Properties of Petersenite-(Ce)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.41 gm/cc
note: Specific Gravity of Petersenite-(Ce) =3.69 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEPetersenite-(Ce) = 199.47 barns/electron
U=PEPetersenite-(Ce) x relectron= 680.11 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 39,054.88 (Gamma Ray American Petroleum Institute Units)
Concentration of Petersenite-(Ce) per GRapi unit = 25.60 (PPM)

Petersenite-(Ce) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 10 cm box) 778.82 ±194.70 grams of pure Petersenite-(Ce) .

Estimated Radioactivity from Petersenite-(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 / 8.03 cm 887,606 2.40E-05 39,054.88 12.84
100 gm / 3.73 cm 88,761 2.40E-06 3,905.49 1.28
10 gm / 1.73 cm 8,876 2.40E-07 390.55 0.13
1 gm / 8.03 mm 888 2.40E-08 39.05 0.01
0.1 gm / 3.73 mm 89 2.40E-09 3.91 0.00
0.01 gm / 1.73 mm 9 2.40E-10 0.39 0.00
0.001 gm / 0.80 mm 1 2.40E-11 0.04 0.00

Weight of pure Petersenite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.69 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 ( 1.98 % Th) From Sum REE Elements (39.63 % REE)
 

Petersenite-(Ce) Classification

Help on  Dana Class: Dana Class: 14.04.05.02 (14)Anhydrous Carbonates
  (14.04)with Compound Formula A+2 B++2 (CO3)4
  (14.04.05)Burbankite Group (Monoclinic)
 
14.04.05.01 Remondite-(Ce) Na3(Ce,La,Ca,Na,Sr)3(CO3)5 P 21 2
 
14.04.05.02 Petersenite-(Ce) (Na,Ca)4(Ce,La,Nd)2(CO3)5 P 21 2
 
14.04.05.03 Remondite-(La)! Na3(La,Ce,Ca)3(CO3)5 P 21 2
Help on  Strunz Class: Strunz Class: 05.AD.15 05 - CARBONATES (NITRATES)
  05.A - Carbonates without additional anions, without H2O
  05.AD -With rare-earth elements (REE)
 
05.AD.15 Remondite-(Ce) Na3(Ce,La,Ca,Na,Sr)3(CO3)5 P 21 2
 
05.AD.15 Petersenite-(Ce) (Na,Ca)4(Ce,La,Nd)2(CO3)5 P 21 2
 
05.AD.15 Remondite-(La)! Na3(La,Ce,Ca)3(CO3)5 P 21 2
 

Other Petersenite-(Ce) Information

Help on References: References: NAME( AntBidBlaNic5) PHYS. PROP.(Am.Min.,Vol.80,p406,1995) OPTIC PROP.(Am.Min.,Vol.80,p406,1995)
Help on See Also: See Also: Links to other databases for Petersenite-(Ce) :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - EUROmin Project
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Print or Cut-and-Paste your Petersenite-(Ce) Specimen Label here :

Petersenite-(Ce)

(Na,Ca)4(Ce,La,Nd)2(CO3)5
Dana No: 14.04.05.02 Strunz No: 05.AD.15
Locality:

 

Notes:

 

 
   
 


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