Mineralogy Database

Przhevalskite Mineral Data

Search Webmineral :
  
Advertisment

General Przhevalskite Information

Help on Chemical  Formula: Chemical Formula: Pb(UO2)2(PO4)2•4(H2O)
Help on Composition: Composition: Molecular Weight = 1,009.26 gm
   Uranium     47.17 %  U    53.51 % UO2
   Phosphorus   6.14 %  P    14.06 % P2O5
   Hydrogen     0.80 %  H     7.14 % H2O
   Lead        20.53 %  Pb   22.12 % PbO
   Oxygen      25.36 %  O
              ______        ______ 
              100.00 %       96.83 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb(UO2)2(PO4)2•4(H2O)
Help on Environment: Environment: Found in the oxidation zone of a pitchblende-sulfide deposit.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1946
Help on Locality: Locality: Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Nikolai M. Przhevalsky (1839-1888), Russian explorer.
Help on Name Pronunciation: Name Pronunciation: Przhevalskite + Pronunciation Say PRZHEVALSKITE
 

Przhevalskite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.51657
Help on Cell Dimensions: Cell Dimensions: a = 7.24, c = 18.22, Z = 2; V = 955.05 Den(Calc)= 3.51
Help on Crystal System: Crystal System: Tetragonal Space Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.61(1), 9.08(0.9), 1.619(0.6),
 

Physical Properties of Przhevalskite

Help on Cleavage: Cleavage: {001} Distinct
Help on Color: Color: Yellow, Bright greenish yellow.
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Foliated - Two dimensional platy forms.
Help on Hardness: Hardness: 2-3 - Gypsum-Calcite
Help on Luminescence: Luminescence: Non-Fluorescent.
Help on Luster: Luster: Adamantine - Pearly
Help on Streak: Streak: light yellow
 

Optical Properties of Przhevalskite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= -0.6 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2127,KC= 0.1329
Ncalc = 1.47
Help on Optical Data: Optical Data: Biaxial (-), a=1.739, b=1.749, g=1.752, bire=0.0130, 2V(Calc)=56, 2V(Meas)=30.
 

Calculated Properties of Przhevalskite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.00 gm/cc
note: Specific Gravity of Przhevalskite =3.51 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PEPrzhevalskite =1,618.56 barns/electron
U=PEPrzhevalskite x relectron=4,863.48 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 3,441,927.29 (Gamma Ray American Petroleum Institute Units)
Concentration of Przhevalskite per GRapi unit = 290.53 (PPB)

Przhevalskite 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) 8.84 ± 2.21 grams of pure Przhevalskite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 883.71 ±220.93 grams of pure Przhevalskite .

Estimated Radioactivity from Przhevalskite - 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 / 8.16 cm 84,432,564 2.28E-03 3,441,927.29 1,131.59
100 gm / 3.79 cm 8,443,256 2.28E-04 344,192.73 113.16
10 gm / 1.76 cm 844,326 2.28E-05 34,419.27 11.32
1 gm / 8.16 mm 84,433 2.28E-06 3,441.93 1.13
0.1 gm / 3.79 mm 8,443 2.28E-07 344.19 0.11
0.01 gm / 1.76 mm 844 2.28E-08 34.42 0.01
0.001 gm / 0.82 mm 84 2.28E-09 3.44 0.00

Weight of pure Przhevalskite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.51 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
 

Przhevalskite Classification

Help on  Dana Class: Dana Class: 40.02a.21.01 (40)Hydrated Phosphates, etc
  (40.02a)where A++ (B++)2 (XO4) � x(H2O), containing (UO2)++
  (40.02a.21)Dana Group
 
40.02a.21.01 Przhevalskite Pb(UO2)2(PO4)2•4(H2O) Unk Tetra
Help on  Strunz Class: Strunz Class: 08.EB.10 08 - PHOSPHATES, ARSENATES, VANADATES
  08.E - Uranyl Phosphates and Arsenates
  08.EB -UO2:RO4 = 1:1
 
08.EB.10 Bassetite Fe(UO2)2(PO4)2•8(H2O) P 21/m 2/m
 
08.EB.10 Lehnerite Mn[UO2/PO4]2•8(H2O) P 21/n 2/m
 
08.EB.10 Metazeunerite Cu(UO2)2(AsO4)2•8(H2O) P 4/n 4/m
 
08.EB.10 Meta-autunite Ca(UO2)2(PO4)2•2-6(H2O) P 4/nmm 4/m 2/m 2/m
 
08.EB.10 Metauranocircite Ba(UO2)2(PO4)2•6-8(H2O) P 21 2
 
08.EB.10 Metauranospinite Ca(UO2)2(AsO4)2•8(H2O) P 4/nmm 4/m 2/m 2/m
 
08.EB.10 Metaheinrichite Ba(UO2)2(AsO4)2•8(H2O) P 21 2
 
08.EB.10 Metakahlerite Fe(UO2)2(AsO4)2•8(H2O) P 4/mmm 4/m 2/m 2/m
 
08.EB.10 Metakirchheimerite Co(UO2)2(AsO4)2•8(H2O) P 4/mmm 4/m 2/m 2/m
 
08.EB.10 Metalodevite Zn(UO2)2(AsO4)2•10(H2O) P 41/m 4/m
 
08.EB.10 Metanovacekite Mg(UO2)2(AsO4)2•4-8(H2O) P 4/n 4/m
 
08.EB.10 Metatorbernite Cu(UO2)2(PO4)2•8(H2O) P 4/n 4/m
 
08.EB.10 Przhevalskite Pb(UO2)2(PO4)2•4(H2O) Unk Tetra
 

Other Przhevalskite 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 Przhevalskite :
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

Search for Przhevalskite using:

Google
 
Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Przhevalskite :

Ask about Przhevalskite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Przhevalskite

Pb(UO2)2(PO4)2•4(H2O)
Dana No: 40.02a.21.01 Strunz No: 08.EB.10
Locality:

 

Notes:

 

 
   
 


Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.