Mineralogy Database

Natroboltwoodite Mineral Data

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General Natroboltwoodite Information

Help on Chemical  Formula: Chemical Formula: (H3O)(Na,K)(UO2)SiO4•(H2O)
Help on Composition: Composition: Molecular Weight = 696.19 gm
   Potassium   1.40 %  K     1.69 % K2O
   Sodium      2.48 %  Na    3.34 % Na2O
   Uranium    68.38 %  U    77.57 % UO2
   Silicon     4.03 %  Si    8.63 % SiO2
   Hydrogen    0.72 %  H     6.47 % H2O
   Oxygen     22.98 %  O
             ______        ______ 
             100.00 %       97.70 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: (H3O)Na0.75K0.25(UO2)2(SiO4)•(H2O)
Help on Environment: Environment: Oxidation zone mineral.
Help on IMA Status: IMA Status: Approved IMA 1975
Help on Locality: Locality: Unspecifed arid regions of the former USSR. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the composition and relationship to boltwoodite.
Help on Synonym: Synonym: Sodium boltwoodite - Renamed to Natroboltwoodite by Mineralogical Record, v39 (2008), p131
 

Natroboltwoodite Image

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  Natroboltwoodite

Comments: Pale yellow, massive, waxy natroboltwoodite.
Location: Alluaiv Mountain, Lovozero, Russia. Scale: See Image.
© Rruff Database

Natroboltwoodite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =3.9031:1:0.9472
Help on Cell Dimensions: Cell Dimensions: a = 27.4, b = 7.02, c = 6.65, Z = 4; V = 1,279.11 Den(Calc)= 3.61
Help on Crystal System: Crystal System: Orthorhombic - Disphenoidal H-M Symbol (2 2 2) Space Group: P 212121
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.92(1), 6.71(1), 4.7(0.8),
 

Physical Properties of Natroboltwoodite

Help on Color: Color: Yellow, White.
Help on Density: Density: 4.1
Help on Hardness: Hardness: 3.5-4 - Copper Penny-Fluorite
 

Optical Properties of Natroboltwoodite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.207 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.371 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1743,KPDmeas= 0.1535,KC= 0.1272
Ncalc = 1.46 - 1.52
Help on Optical Data: Optical Data: Biaxial (-), a=1.613, b=1.63, g=1.645, bire=0.0320
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (z): Pleochroism (z): pale yellow.
 

Calculated Properties of Natroboltwoodite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.49 gm/cc
note: Specific Gravity of Natroboltwoodite =4.10 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0069203925
Boson Index = 0.9930796075
Help on Photoelectric: Photoelectric: PENatroboltwoodite =1,824.80 barns/electron
U=PENatroboltwoodite x relectron=6,361.97 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 4,956,284.34 (Gamma Ray American Petroleum Institute Units)
Concentration of Natroboltwoodite per GRapi unit = 201.76 (PPB)

Natroboltwoodite 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) 6.14 ± 1.53 grams of pure Natroboltwoodite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 613.70 ±153.42 grams of pure Natroboltwoodite .

Estimated Radioactivity from Natroboltwoodite - very 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 / 7.75 cm 122,400,731 3.31E-03 4,956,284.34 1,629.46
100 gm / 3.60 cm 12,240,073 3.31E-04 495,628.43 162.95
10 gm / 1.67 cm 1,224,007 3.31E-05 49,562.84 16.29
1 gm / 7.75 mm 122,401 3.31E-06 4,956.28 1.63
0.1 gm / 3.60 mm 12,240 3.31E-07 495.63 0.16
0.01 gm / 1.67 mm 1,224 3.31E-08 49.56 0.02
0.001 gm / 0.78 mm 122 3.31E-09 4.96 0.00

Weight of pure Natroboltwoodite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.10 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
 

Natroboltwoodite Classification

Help on  Dana Class: Dana Class: 53.03.01.06 (53)Nesosilicate Insular SiO4 Groups and Other Anions of Complex Cations
  (53.03)with (UO2)
  (53.03.01)Uranophane group
 
53.03.01.01 Kasolite Pb(UO2)SiO4•(H2O) P 21/a 2/m
 
53.03.01.02 Uranophane Ca(UO2)2SiO3(OH)2•5(H2O) P 21 2
 
53.03.01.03 Sklodowskite (H3O)2Mg(UO2)2(SiO4)2•4(H2O) C 2/m 2/m
 
53.03.01.04 Cuprosklodowskite Cu[(UO2)(SiO2OH)]2•6(H2O) P1 1
 
53.03.01.05 Boltwoodite HK(UO2)(SiO4)•1.5(H2O) P 21 2
 
53.03.01.06 Natroboltwoodite (H3O)(Na,K)(UO2)SiO4•(H2O) P 212121 2 2 2
 
53.03.01.07 Oursinite (Co,Mg)(H3O)2[(UO2)SiO4]2•3(H2O) Aba2,Abam Ortho
 
53.03.01.08 Swamboite UH6(UO2)6(SiO4)6•30(H2O) P 21/a 2/m
 
53.03.01.09 Uranophane-beta Ca[(UO2)SiO3(OH)]2•(H2O) P 21/a 2/m
Help on  Strunz Class: Strunz Class: 09.AK.15 09 - SILICATES (Germanates)
  09.A - Nesosilicates
  09.AK -Uranyl neso- and polysilicates
 
09.AK.15 Boltwoodite HK(UO2)(SiO4)•1.5(H2O) P 21 2
 
09.AK.15 Kasolite Pb(UO2)SiO4•(H2O) P 21/a 2/m
 
09.AK.15 Uranophane Ca(UO2)2SiO3(OH)2•5(H2O) P 21 2
 
09.AK.15 Natroboltwoodite (H3O)(Na,K)(UO2)SiO4•(H2O) P 212121 2 2 2
 

Other Natroboltwoodite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Larousse des Mineraux,1981) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Natroboltwoodite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Print or Cut-and-Paste your Natroboltwoodite Specimen Label here :

Natroboltwoodite

(H3O)(Na,K)(UO2)SiO4•(H2O)
Dana No: 53.03.01.06 Strunz No: 09.AK.15
Locality:

 

Notes:

 

 
   
 


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