Spriggite Mineral Data

Spriggite Mineral Data
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General Spriggite Information

Help on Chemical Formula: Chemical Formula: Pb3[(UO2)6O8(OH)2](H2O)x; x ~ 3
Help on Composition: Composition: Molecular Weight = 2,424.63 gm
   Barium     0.23 %  Ba    0.25 % BaO
   Calcium    0.10 %  Ca    0.14 % CaO
   Uranium   59.10 %  U    67.04 % UO2
   Hydrogen   0.33 %  H     2.99 % H2O
   Lead      23.76 %  Pb   25.59 % PbO
   Oxygen    16.48 %  O
            ______        ______ 
            100.00 %       96.02 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb2.78Ca0.06Ba0.04(UO2)6.02O7.89(OH)2.05•3(H2O)
Help on Environment: Environment: Found in the alteration zone of a hydrothermal hematite-U-Nb-REE deposit from the Mt Painter inlier. New structure type
Help on IMA Status: IMA Status: Approved IMA 2003 (Dana # Added)
Help on Locality: Locality: Near Arkaroola, Northern Flinders Ranges, South Australia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Reginald Claude Sprigg (1919-1994), South Australian Geological Survey.
Help on Synonym: Synonym: IMA2002-014
 

Spriggite Image

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Spriggite

Comments: Secondary electron microscope image of spriggite crystals and twins. (AmMin, 89:341).
Location: Number 2 workings, Radium Ridge, Northern Flinders Ranges, South Australia. Scale: See Image.
© American Mineralogist

Spriggite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =2.3648:1:1.1674
Help on Cell Dimensions: Cell Dimensions: a = 28.355, b = 11.99, c = 13.998, Z = 8; beta = 104.248° V = 4,612.60 Den(Calc)= 6.98
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.1(1)(204,604,332,5323.46(0.8)(800), 1.918(0.6)(10.04), 6.92(0.6)(400), 2.01(0.3)(336), 2.74(0.3)(440), 6.02(0.3)(112,020), 1.738(0.3
Click Here for Large Spriggite Structure Window Crystal Structure:

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Brugger J , Krivovichev S V , Berlepsch P , Meisser N , Ansermet S , Armbruster T , American Mineralogist , 89 (2004) p.339-347, Spriggite, Pb3[(UO2)6O8(OH)2](H2O)3, a new mineral with beta-U3O8 - type sheets:, Description and crystal structure

 

Physical Properties of Spriggite

Help on Cleavage: Cleavage: {100} Good
Help on Color: Color: Bright orange.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: pale orange
 

Optical Properties of Spriggite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= -0.087 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1216,KC= 0.1119
Ncalc = 1.78
Help on Optical Data: Optical Data: Biaxial (?), a=1.807, g=1.891, bire=0.0840
 

Calculated Properties of Spriggite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.72 gm/cc
note: Specific Gravity of Spriggite =6.98 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.05
Boson Index = 0.95
Help on Photoelectric: Photoelectric: PESpriggite =2,083.02 barns/electron
U=PESpriggite x relectron=11910.80 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 4,126,731.93 (Gamma Ray American Petroleum Institute Units)
Concentration of Spriggite per GRapi unit = 242.32 (PPB)

Spriggite 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) 7.37 ± 1.84 grams of pure Spriggite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 737.06 ±184.27 grams of pure Spriggite .

Estimated Radioactivity from Spriggite - very strong
Specimen
Size
Weight/Volume
(Sphere) *		 Calculated
Activity
Becquerels
(Bq)		 Calculated
Activity
Curies (Ci)		 Estimated
Activity
GR(api)		 Estimated
Exposure
(mRem**)/hr
If Held in Hand
For One Hour
1000 gm / 6.49 cm 105,787,495 2.86E-03 4,126,731.93 1,356.73
100 gm / 3.01 cm 10,578,750 2.86E-04 412,673.19 135.67
10 gm / 1.40 cm 1,057,875 2.86E-05 41,267.32 13.57
1 gm / 6.49 mm 105,787 2.86E-06 4,126.73 1.36
0.1 gm / 3.01 mm 10,579 2.86E-07 412.67 0.14
0.01 gm / 1.40 mm 1,058 2.86E-08 41.27 0.01
0.001 gm / 0.65 mm 106 2.86E-09 4.13 0.00

Weight of pure Spriggite in grams (gm) and Calculated Diameter of a Sphere with a Density of 6.98 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
 

Spriggite Classification
Help on Dana Class: Dana Class: 05.02.03.01 (05)Oxides Containing Uranium and Thorium
  (05.02)with a cation charge of 6+ (AO3) and hydrated
  (05.02.03)Dana Group
 
05.02.03.01 Spriggite! Pb3[(UO2)6O8(OH)2](H2O)x;x~3 C 2/c 2/m
Help on Strunz Class: Strunz Class: 04.GC.15 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.G - Uranyl Hydroxides
  04.GC -With additional cations; with UO2(O,OH)6 hexagonal polyhedra
 
04.GC.15 Spriggite! Pb3[(UO2)6O8(OH)2](H2O)x;x~3 C 2/c 2/m
 

Other Spriggite Information
Help on References: References: NAME( AmMin, v 89, p 339) PHYS. PROP.(AmMin, v 89, p 339) OPTIC PROP.(AmMin, v 89, p 339)
Help on See Also: See Also: Links to other databases for Spriggite :
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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Ask about Spriggite here :
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Print or Cut-and-Paste your Spriggite Specimen Label here :

Spriggite

Pb3[(UO2)6O8(OH)2](H2O)x; x ~ 3
Dana No: 05.02.03.01 Strunz No: 04.GC.15
Locality:

 

Notes: