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Vanmeersscheite Mineral Data

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General Vanmeersscheite Information

Help on Chemical  Formula: Chemical Formula: U++++++(UO2)3(PO4)2(OH)6•4(H2O)
Help on Composition: Composition: Molecular Weight = 1,412.16 gm
   Uranium     67.42 %  U    57.36 % UO2 / 20.25 % UO3
   Phosphorus   4.39 %  P    10.05 % P2O5
   Hydrogen     1.00 %  H     8.93 % H2O
   Oxygen      27.19 %  O
              ______        ______ 
              100.00 %       96.60 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: U(UO2)3(PO4)2(OH)6•4(H2O)
Help on Environment: Environment: In the oxidized zone of uranium-bearing mineral deposits.
Help on IMA Status: IMA Status: Approved IMA 1982
Help on Locality: Locality: Shinkolobwe, Congo. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Adrien Vandendriessche (1914-1940), Belgian mineralogist and geologist, University of Ghent, Ghent, Belgium.
Help on Name Pronunciation: Name Pronunciation: Vanmeersscheite + Pronunciation Say VANMEERSSCHEITE
 

Vanmeersscheite Image

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  Vanmeersscheite   Metavanmeersscheite

Comments: Yellow coatings of vanmeersscheite on sandstone. Unless sealed in glass, all specimens should be considered to have become metavanmeersscheite.
Location: Cameron, Coconino Co., Arizona, USA. Scale: Sample Size 4 cm Glass Vial.
© Diederik Visser

Vanmeersscheite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.0178:1:0.419
Help on Cell Dimensions: Cell Dimensions: a = 17.06, b = 16.76, c = 7.023, Z = 4; V = 2,008.06 Den(Calc)= 4.67
Help on Crystal System: Crystal System: Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: P mn21
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 8.39(1), 5.96(0.8), 4.18(0.7),
 

Physical Properties of Vanmeersscheite

Help on Cleavage: Cleavage: {010} Good, {100} Indistinct
Help on Color: Color: Canary yellow.
Help on Density: Density: 4.67
Help on Habit: Habit: Pseudo Hexagonal - Crystals show a hexagonal outline.
Help on Hardness: Hardness: 2-3 - Gypsum-Calcite
Help on Streak: Streak: light yellow
 

Optical Properties of Vanmeersscheite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.173 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.173 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1525,KPDmeas= 0.1525,KC= 0.13
Ncalc = 1.61
Help on Optical Data: Optical Data: Biaxial (-), a=1.704, b=1.715, g=1.718, bire=0.0140, 2V(Calc)=54, 2V(Meas)=56.
Help on Pleochroism (x): Pleochroism (x): nearly colorless.
Help on Pleochroism (y): Pleochroism (y): yellow orange or golden yellow.
Help on Pleochroism (z): Pleochroism (z): yellow orange or golden yellow.
 

Calculated Properties of Vanmeersscheite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.99 gm/cc
note: Specific Gravity of Vanmeersscheite =4.67 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0049864482
Boson Index = 0.9950135518
Help on Photoelectric: Photoelectric: PEVanmeersscheite =1,788.43 barns/electron
U=PEVanmeersscheite x relectron=7,144.52 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 4,916,121.54 (Gamma Ray American Petroleum Institute Units)
Concentration of Vanmeersscheite per GRapi unit = 203.41 (PPB)

Vanmeersscheite 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) 6.19 ± 1.55 grams of pure Vanmeersscheite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 618.71 ±154.68 grams of pure Vanmeersscheite .

Estimated Radioactivity from Vanmeersscheite - 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 / 7.42 cm 120,686,541 3.26E-03 4,916,121.54 1,616.26
100 gm / 3.45 cm 12,068,654 3.26E-04 491,612.15 161.63
10 gm / 1.60 cm 1,206,865 3.26E-05 49,161.22 16.16
1 gm / 7.42 mm 120,687 3.26E-06 4,916.12 1.62
0.1 gm / 3.45 mm 12,069 3.26E-07 491.61 0.16
0.01 gm / 1.60 mm 1,207 3.26E-08 49.16 0.02
0.001 gm / 0.74 mm 121 3.26E-09 4.92 0.00

Weight of pure Vanmeersscheite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.67 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
 

Vanmeersscheite Classification

Help on  Dana Class: Dana Class: 42.07.14.01 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.07)where (AB)5 (XO4)3 Zq � x(H2O)
  (42.07.14)Vanmeersscheite Group
 
42.07.14.01 Vanmeersscheite U(UO2)3(PO4)2(OH)6•4(H2O) P mn21 mm2
 
42.07.14.02 Metavanmeersscheite U(UO2)3(PO4)2(OH)6•2(H2O) F dd2 mm2
 
42.07.14.03 Arsenovanmeersscheite U(OH)4[(UO2)3(AsO4)2(OH)2]•4H2O P 21mn 2 2 2
Help on  Strunz Class: Strunz Class: 08.EC.20 08 - PHOSPHATES, ARSENATES, VANADATES
  08.E - Uranyl Phosphates and Arsenates
  08.EC -UO2:RO4 = 3:2
 
08.EC.20 Metavanmeersscheite U(UO2)3(PO4)2(OH)6•2(H2O) F dd2 mm2
 
08.EC.20 Vanmeersscheite U(UO2)3(PO4)2(OH)6•4(H2O) P mn21 mm2
 
08.EC.20 Arsenovanmeersscheite U(OH)4[(UO2)3(AsO4)2(OH)2]•4H2O P 21mn 2 2 2
 

Other Vanmeersscheite Information

Help on References: References: NAME( AntBidBlaNic4) 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 Vanmeersscheite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - Uranium Minerals

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

Vanmeersscheite

U++++++(UO2)3(PO4)2(OH)6•4(H2O)
Dana No: 42.07.14.01 Strunz No: 08.EC.20
Locality:

 

Notes:

 

 
   
 


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