Mckelveyite-(Nd) Mineral Data + Say MCKELVEYITE-(ND)

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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 %      100.17 % = 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.
 

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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 - PinacoidalH-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 Diaphaniety: Diaphaniety: 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= 0.154 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.185,KPDmeas= 0.1758,KC= 0.2187
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:

relectron=3.25 gm/cc
note: rMckelveyite-(Nd) =3.35 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.06319
Boson Index = 0.93681
Help on Photoelectric: Photoelectric:

PEMckelveyite-(Nd) = 151.52 barns/electron
U=PEMckelveyite-(Nd) x relectron= 492.78 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 9,813.25 (Gamma Ray American Petroleum Institute Units)

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 / 8.29 cm 212,269 5.74E-06 9,813.25 3.23
100 gm / 3.85 cm 21,227 5.74E-07 981.33 0.32
10 gm / 1.79 cm 2,123 5.74E-08 98.13 0.03
1 gm / 8.29 mm 212 5.74E-09 9.81 0.00
0.1 gm / 3.85 mm 21 5.74E-10 0.98 0.00
0.01 gm / 1.79 mm 2 5.74E-11 0.10 0.00
0.001 gm / 0.83 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 3.35 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: 15.3.4.3 (15)Hydrated Carbonates
  (15.3)where A+m B++n (XO3)p · x(H2O), (m+n):p = 1:1 and containing U, Th, Zr, Y
  (15.3.4)Dana Group
 
15.3.4.1 Donnayite-(Y) Sr3NaCaY(CO3)6·3(H2O) P1 1
 
15.3.4.2 Mckelveyite-(Y) Ba3Na(Ca,U)Y(CO3)6·3(H2O) P1 1
 
15.3.4.3 Mckelveyite-(Nd) * (Ba,Sr)(Ca,Na,Nd,REE)(CO3)2·3-10(H2O) P1 1
 
15.3.4.4 Weloganite Sr3Na2Zr(CO3)6·3(H2O) P1 1
Help on  Strunz Class: Strunz Class: V/D.04-25 V - Nitrates, Carbonates and Borates
  V/D - Water-bearing carbonates without unfamiliar anions
  V/D.04 - Donnayite-(Y) - Weloganite series
 
V/D.04-05 Ewaldite (Ba,Sr)(Ca,Na,Y,Ce)(CO3)2 P 63mc 6mm
 
V/D.04-10 Donnayite-(Y) Sr3NaCaY(CO3)6·3(H2O) P1 1
 
V/D.04-20 Mckelveyite-(Y) Ba3Na(Ca,U)Y(CO3)6·3(H2O) P1 1
 
V/D.04-25 Mckelveyite-(Nd) (Ba,Sr)(Ca,Na,Nd,REE)(CO3)2·3-10(H2O) P1 1
 
V/D.04-30 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 -Google Images 5 -Google Scholar 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas

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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: 15.3.4.3 Strunz No: V/D.04-25
Locality:

 

Notes:

 

 
   
 
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