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Mckelveyite-(Nd) Mineral Data

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General Mckelveyite-(Nd) Information

Help on Chemical  Formula: Chemical Formula: (Ba,Sr)(Ca,Na,Nd,REE)(CO3)2•3-10(H2O)
Help on Composition: Composition: Molecular Weight = 456.93 gm
   Barium           22.54 %  Ba   25.17 % BaO
   Sodium            1.01 %  Na    1.36 % Na2O
   Strontium         4.79 %  Sr    5.67 % SrO
   Calcium           4.39 %  Ca    6.14 % CaO
   La,Ce,Pr,Nd,Sm,   3.15 %  RE    3.68 % REE2O3
   Hydrogen          3.53 %  H    31.54 % H2O
   Carbon            5.26 %  C    19.26 % CO2
   Neodymium         6.31 %  Nd    7.36 % Nd2O3
   Oxygen           49.02 %  O
                   ______        ______ 
                   100.00 %      100.18 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ba0.75Sr0.25Ca0.5Na0.2Nd0.2REE0.1(CO3)2•8(H2O)
Help on Environment: Environment: An inadequately described species.
Help on IMA Status: IMA Status: Not Approved IMA 1993
Help on Locality: Locality: Vuoriyarvi massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after Vincent E. McKelvey, 1916-1985), director of the U.S. Geological Survey.
Help on Name Pronunciation: Name Pronunciation: Mckelveyite-(Nd) + Pronunciation Say MCKELVEYITE-(ND)
 

Mckelveyite-(Nd) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.0001:1:0.7669
Help on Cell Dimensions: Cell Dimensions: a = 9.183, b = 9.182, c = 7.042, Z = 2; alpha = 102.52°, beta = 115.66°, gamma = 59.99° V = 452.44 Den(Calc)= 3.35
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.933(1), 4.49(0.9), 2.655(0.8),
 

Physical Properties of Mckelveyite-(Nd)

Help on Cleavage: Cleavage: None
Help on Color: Color: Brown, Yellow, Light green.
Help on Density: Density: 3.47 - 3.58, Average = 3.52
Help on Diaphaneity: Diaphaneity: Translucent
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 3-3.5 - Calcite-Copper Penny
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Mckelveyite-(Nd)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.196 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.133 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1895,KPDmeas= 0.1758,KC= 0.2187
Ncalc = 1.72 - 1.78
Help on Optical Data: Optical Data: Biaxial (-), a=1.556, b=1.65, g=1.653, bire=0.0970, 2V(Calc)=18, 2V(Meas)=10-13.
 

Calculated Properties of Mckelveyite-(Nd)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.17 gm/cc
note: Specific Gravity of Mckelveyite-(Nd) =3.27 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.06
Boson Index = 0.94
Help on Photoelectric: Photoelectric: PEMckelveyite-(Nd) = 151.52 barns/electron
U=PEMckelveyite-(Nd) x relectron= 481.01 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 9,813.26 (Gamma Ray American Petroleum Institute Units)
Concentration of Mckelveyite-(Nd) per GRapi unit = 101.90 (PPM)

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

Estimated Radioactivity from Mckelveyite-(Nd) - mild
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 / 8.36 cm 212,269 5.74E-06 9,813.26 3.23
100 gm / 3.88 cm 21,227 5.74E-07 981.33 0.32
10 gm / 1.80 cm 2,123 5.74E-08 98.13 0.03
1 gm / 8.36 mm 212 5.74E-09 9.81 0.00
0.1 gm / 3.88 mm 21 5.74E-10 0.98 0.00
0.01 gm / 1.80 mm 2 5.74E-11 0.10 0.00
0.001 gm / 0.84 mm 0 5.74E-12 0.01 0.00

Weight of pure Mckelveyite-(Nd) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.27 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 ( 0.47 % Th) From Sum REE Elements ( 9.46 % REE)
 

Mckelveyite-(Nd) Classification

Help on  Dana Class: Dana Class: 15.03.04.03 (15)Hydrated Carbonates
  (15.03)where A+m B++n (XO3)p � x(H2O), (m+n):p = 1:1 and containing U, Th, Zr, Y
  (15.03.04)Mckelveyite Group
 
15.03.04.01 Donnayite-(Y) Sr3NaCaY(CO3)6•3(H2O) P1 1
 
15.03.04.02 Mckelveyite-(Y) NaCa(Ba,Sr)3(Y,REE)(CO3)6•3(H2O) Cc m
 
15.03.04.03 Mckelveyite-(Nd)* (Ba,Sr)(Ca,Na,Nd,REE)(CO3)2•3-10(H2O) P1 1
 
15.03.04.04 Weloganite Sr3Na2Zr(CO3)6•3(H2O) P1 1
Help on  Strunz Class: Strunz Class: 05.CC.05 05 - CARBONATES (NITRATES)
  05.C - Carbonates without Additional Anions, with H2O
  05.CC -With rare-earth elements (REE)
 
05.CC.05 Donnayite-(Y) Sr3NaCaY(CO3)6•3(H2O) P1 1
 
05.CC.05 Mckelveyite-(Nd)* (Ba,Sr)(Ca,Na,Nd,REE)(CO3)2•3-10(H2O) P1 1
 
05.CC.05 Mckelveyite-(Y) NaCa(Ba,Sr)3(Y,REE)(CO3)6•3(H2O) Cc m
 
05.CC.05 Weloganite Sr3Na2Zr(CO3)6•3(H2O) P1 1
 

Other Mckelveyite-(Nd) Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Am.Min.,Vol.78,p236,1993)
Help on See Also: See Also: Links to other databases for Mckelveyite-(Nd) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - MinDAT
8 - Mineralienatlas (Deutsch)
9 - Online Mineral Museum
10 - QUT Mineral Atlas
11 - Ruff.Info

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Print or Cut-and-Paste your Mckelveyite-(Nd) Specimen Label here :

Mckelveyite-(Nd)

(Ba,Sr)(Ca,Na,Nd,REE)(CO3)2•3-10(H2O)
Dana No: 15.03.04.03 Strunz No: 05.CC.05
Locality:

 

Notes:

 

 
   
 


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