Remondite-(Ce) Mineral Data

Remondite-(Ce) Mineral Data
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General Remondite-(Ce) Information

Help on Chemical Formula: Chemical Formula: Na3(Ce,La,Ca,Na,Sr)3(CO3)5
Help on Composition: Composition: Molecular Weight = 611.79 gm
   Sodium     11.65 %  Na   15.70 % Na2O
   Strontium   1.43 %  Sr    1.69 % SrO
   Calcium     1.31 %  Ca    1.83 % CaO
   Lanthanum   9.08 %  La   10.65 % La2O3
   Cerium     27.48 %  Ce   32.19 % Ce2O3
   Carbon      9.82 %  C    35.97 % CO2
   Oxygen     39.23 %  O
             ______        ______ 
             100.00 %       98.04 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na3Ce1.2La0.4Ca0.2Na0.1Sr0.1(CO3)5
Help on Environment: Environment: Nepheline syenite.
Help on IMA Status: IMA Status: Approved IMA 1988
Help on Locality: Locality: Ebounja, near Kribi, Cameroon. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Guy Remond (1935-), physicist, Bureau de Recherches G´eologiques et Mini`eres, Orl´eans, France and the predominance of cerium over other rare-earth elements in the compos ition.
Help on Name Pronunciation: Name Pronunciation: Remondite-(Ce) + Pronunciation Say REMONDITE-(CE)
Help on Synonym: Synonym: ICSD 65110
  PDF 46-1268
 

Remondite-(Ce) Image

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Remondite-(Ce)

Comments: Flesh-colored, acicular crystals of remondite-(Ce) in matrix.
Location: Mt. St. Hilaire, Quebec, Canada. Scale: Box Base 3 x 3 cm.
© Sonke Stolze / Systematic Minerals

Remondite-(Ce) Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.6543:1:1.6545
Help on Cell Dimensions: Cell Dimensions: a = 10.444, b = 6.313, c = 10.445, Z = 3; beta = 119.86° V = 597.25 Den(Calc)= 5.10
Help on Crystal System: Crystal System: Monoclinic - SphenoidalH-M Symbol (2) Space Group: P 21
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.589(1), 2.609(0.7), 3.006(0.7),
Click Here for Large Remondite-(Ce) Structure Window Crystal Structure:

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Marsh R E , Acta Crystallographica, Section C , 45 (1989) p.1840-1840, Structure of Na3M3(CO3)5. Corrigendum

 

Physical Properties of Remondite-(Ce)

Help on Cleavage: Cleavage: {???} Indistinct
Help on Color: Color: Reddish orange.
Help on Density: Density: 3.43
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 3-3.5 - Calcite-Copper Penny
Help on Luminescence: Luminescence: Photochromic.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Remondite-(Ce)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.062 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.286 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1244,KPDmeas= 0.1849,KC= 0.1742
Ncalc = 1.6 - 1.89
Help on Optical Data: Optical Data: Biaxial (+), a=1.632, b=1.633, g=1.638, bire=0.0060, 2V(Calc)=50, 2V(Meas)=40-48.
 

Calculated Properties of Remondite-(Ce)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.19 gm/cc
note: Specific Gravity of Remondite-(Ce) =3.43 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0023700335
Boson Index = 0.9976299665
Help on Photoelectric: Photoelectric: PERemondite-(Ce) = 180.66 barns/electron
U=PERemondite-(Ce) x relectron= 575.92 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 36,248.84 (Gamma Ray American Petroleum Institute Units)
Concentration of Remondite-(Ce) per GRapi unit = 27.59 (PPM)

Remondite-(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) 839.11 ±209.78 grams of pure Remondite-(Ce) .

Estimated Radioactivity from Remondite-(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 / 8.23 cm 819,050 2.21E-05 36,248.84 11.92
100 gm / 3.82 cm 81,905 2.21E-06 3,624.88 1.19
10 gm / 1.77 cm 8,191 2.21E-07 362.49 0.12
1 gm / 8.23 mm 819 2.21E-08 36.25 0.01
0.1 gm / 3.82 mm 82 2.21E-09 3.62 0.00
0.01 gm / 1.77 mm 8 2.21E-10 0.36 0.00
0.001 gm / 0.82 mm 1 2.21E-11 0.04 0.00

Weight of pure Remondite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.43 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 ( 1.83 % Th) From Sum REE Elements (36.56 % REE)
 

Remondite-(Ce) Classification
Help on Dana Class: Dana Class: 14.04.05.01 (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 Remondite-(Ce) Information
Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(www.saint-hilaire.ca) OPTIC PROP.(Am.Min.,Vol.75,p433,1990)
Help on See Also: See Also: Links to other databases for Remondite-(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

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

Remondite-(Ce)

Na3(Ce,La,Ca,Na,Sr)3(CO3)5
Dana No: 14.04.05.01 Strunz No: 05.AD.15
Locality:

 

Notes: