Mckelveyite-(Y) Mineral Data + Say MCKELVEYITE-(Y)


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General Mckelveyite-(Y) Information
Help on Chemical Formula: Chemical Formula: Ba3Na(Ca,U)Y(CO3)6·3(H2O)
Help on Composition: Composition: Molecular Weight = 1,027.54 gm
   Barium    40.09 %  Ba   44.76 % BaO
   Sodium     2.24 %  Na    3.02 % Na2O
   Calcium    2.93 %  Ca    4.09 % CaO
   Yttrium    8.65 %  Y    10.99 % Y2O3
   Uranium    5.79 %  U     6.57 % UO2
   Hydrogen   0.59 %  H     5.26 % H2O
   Carbon     7.01 %  C    25.70 % CO2
   Oxygen    32.70 %  O
            ______        ______ 
            100.00 %      100.39 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ba3NaCa0.75U0.25Y(CO3)6·3(H2O)
Help on Environment: Environment: Eocene-aged lacustrine deposits.
Help on IMA Status: IMA Status: Approved IMA 1965
Help on Locality: Locality: Green River Formation, Sweetwater County, Wyoming, USA. 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-(Y) Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.0001:1:0.7657
Help on Cell Dimensions: Cell Dimensions: a = 9.142, b = 9.141, c = 7, Z = 1; alpha = 102.51°, beta = 115.67°, gamma = 59.99° V = 445.71 Den(Calc)= 3.83
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): 2.915(1), 4.46(0.9), 2.638(0.8),
 

Physical Properties of Mckelveyite-(Y)

Help on Cleavage: Cleavage: [???] Indistinct
Help on Color: Color: Yellow, Black, Greenish gray, White, Gray.
Help on Density: Density: 3.47 - 3.58, Average = 3.52
Help on Diaphaniety: Diaphaniety: Translucent to Opaque
Help on Hardness: Hardness: 3.5-4 - Copper Penny-Fluorite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Mckelveyite-(Y)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.016 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.095 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.153,KPDmeas= 0.1662,KC= 0.169
Help on Optical Data: Optical Data: Biaxial (-), a=1.55-1.554, b=1.55-1.554, g=1.649-1.658, bire=0.0990-0.1040, 2V(Calc)=0, 2V(Meas)=0.
 

Calculated Properties of Mckelveyite-(Y)

Help on Electron Density: Electron Density:

relectron=3.20 gm/cc
note: rMckelveyite-(Y) =3.53 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.07284
Boson Index = 0.92716
Help on Photoelectric: Photoelectric:

PEMckelveyite-(Y) = 333.77 barns/electron
U=PEMckelveyite-(Y) x relectron=1,067.16 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 447,732.53 (Gamma Ray American Petroleum Institute Units)

Mckelveyite-(Y) 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) 67.93 ± 16.98 grams of pure Mckelveyite-(Y) .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 6793.5 ±1698.4 grams of pure Mckelveyite-(Y) .

Estimated Radioactivity from Mckelveyite-(Y) - strong
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 / 8.15 cm 10,366,266 2.80E-04 447,732.53 147.20
100 gm / 3.78 cm 1,036,627 2.80E-05 44,773.25 14.72
10 gm / 1.76 cm 103,663 2.80E-06 4,477.33 1.47
1 gm / 8.15 mm 10,366 2.80E-07 447.73 0.15
0.1 gm / 3.78 mm 1,037 2.80E-08 44.77 0.01
0.01 gm / 1.76 mm 104 2.80E-09 4.48 0.00
0.001 gm / 0.82 mm 10 2.80E-10 0.45 0.00

Weight of pure Mckelveyite-(Y) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.53 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
 

Mckelveyite-(Y) Classification
Help on Dana Class: Dana Class: 15.3.4.2 (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.04-20 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-(Y) Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Mckelveyite-(Y) :
1 - Alkali-Nuts(English) 2 - Alkali-Nuts(Francais) 3 -Am. Min. Crystal Structure Database 4 -Athena 5 - EUROmin Project 6 -Google Images 7 -Google Scholar 8 -Handbook of Mineralogy (UofA) 9 -MinDAT 10 -MinMax(Deutsch) 11 -MinMax(English) 12 -Mineralienatlas (Deutsch) 13 -QUT Mineral Atlas 14 - Uranium Minerals

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Mckelveyite-(Y)

Ba3Na(Ca,U)Y(CO3)6·3(H2O)
Dana No: 15.3.4.2 Strunz No: V/D.04-20
Locality:

 

Notes:

 
 
   
 
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