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Remondite-(La) Mineral Data

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General Remondite-(La) Information

Help on Chemical  Formula: Chemical Formula: Na3(La,Ce,Ca)3(CO3)5
Help on Composition: Composition: Molecular Weight = 624.98 gm
   Sodium     12.25 %  Na   16.51 % Na2O
   Strontium   2.80 %  Sr    3.32 % SrO
   Calcium     3.91 %  Ca    5.47 % CaO
   Lanthanum  17.78 %  La   20.85 % La2O3
   Cerium     15.25 %  Ce   17.86 % Ce2O3
   Carbon      9.61 %  C    35.21 % CO2
   Oxygen     38.40 %  O
             ______        ______ 
             100.00 %       99.22 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na3.33La0.8Ce0.68Ca0.61Sr0.2(CO3)5
Help on Environment: Environment: Late-stage hydrothermal mineral in a hyperagpaitic pegmatite. La-analogue of remondite-(Ce), burbankite group.
Help on IMA Status: IMA Status: Approved IMA 1999 (Dana # Added)
Help on Locality: Locality: Koashva Mountain, Khibiny massif, Kola Penninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as the La analog of remondite-(Ce).
Help on Name Pronunciation: Name Pronunciation: Remondite-(La) + Pronunciation Say REMONDITE-(LA)
Help on Synonym: Synonym: IMA1999-006
 

Remondite-(La) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.6347:1:1.6362
Help on Cell Dimensions: Cell Dimensions: a = 10.49, b = 6.417, c = 10.5, Z = 2; beta = 119.8° V = 613.34 Den(Calc)= 3.38
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): 2.623(1)(204,022,402,223.036(0.9)(112,211,311), 2.143(0.8)(014,410), 3.7(0.7)(012), 1.939(0.6)(032,230), 2.041(0.6)(222), 5.28(0.5)(101,011,301,11
 

Physical Properties of Remondite-(La)

Help on Cleavage: Cleavage: None
Help on Color: Color: Bright orange yellow.
Help on Density: Density: 3.5
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Irregular Grains - Occurs as splotchy, anhedral crystals forming inclusions in other minerals or rocks.
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
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 Remondite-(La)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.01 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.025 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.183,KPDmeas= 0.1768,KC= 0.1785
Ncalc = 1.6 - 1.62
Help on Optical Data: Optical Data: Biaxial (-), a=1.615, b=1.619, g=1.622, bire=0.0070
 

Calculated Properties of Remondite-(La)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.26 gm/cc
note: Specific Gravity of Remondite-(La) =3.50 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0034169256
Boson Index = 0.9965830744
Help on Photoelectric: Photoelectric: PERemondite-(La) = 161.43 barns/electron
U=PERemondite-(La) x relectron= 527.00 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 32,857.98 (Gamma Ray American Petroleum Institute Units)
Concentration of Remondite-(La) per GRapi unit = 30.43 (PPM)

Remondite-(La) 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) 925.70 ±231.43 grams of pure Remondite-(La) .

Estimated Radioactivity from Remondite-(La) - 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 / 8.17 cm 739,775 2.00E-05 32,857.98 10.80
100 gm / 3.79 cm 73,978 2.00E-06 3,285.80 1.08
10 gm / 1.76 cm 7,398 2.00E-07 328.58 0.11
1 gm / 8.17 mm 740 2.00E-08 32.86 0.01
0.1 gm / 3.79 mm 74 2.00E-09 3.29 0.00
0.01 gm / 1.76 mm 7 2.00E-10 0.33 0.00
0.001 gm / 0.82 mm 1 2.00E-11 0.03 0.00

Weight of pure Remondite-(La) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.50 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 ( 1.65 % Th) From Sum REE Elements (33.03 % REE)
 

Remondite-(La) Classification

Help on  Dana Class: Dana Class: 14.04.05.03 (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-(La) Information

Help on References: References: NAME( AmMin, v 86, p 377) PHYS. PROP.(AmMin, v 86, p 377) OPTIC PROP.(AmMin, v 86, p 377)
Help on See Also: See Also: Links to other databases for Remondite-(La) :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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

Remondite-(La)

Na3(La,Ce,Ca)3(CO3)5
Dana No: 14.04.05.03 Strunz No: 05.AD.15
Locality:

 

Notes:

 

 
   
 


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