Mineralogy Database

Parsonsite Mineral Data

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General Parsonsite Information

Help on Chemical  Formula: Chemical Formula: Pb2(UO2)(PO4)2•2(H2O)
Help on Composition: Composition: Molecular Weight = 910.40 gm
   Uranium     26.15 %  U    29.66 % UO2
   Phosphorus   6.80 %  P    15.59 % P2O5
   Hydrogen     0.44 %  H     3.96 % H2O
   Lead        45.52 %  Pb   49.03 % PbO
   Oxygen      21.09 %  O
              ______        ______ 
              100.00 %       98.24 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb2(UO2)(PO4)2•2(H2O)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1923
Help on Locality: Locality: Kaslol, Shava, Zaire. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Arthur Leonard Parsons (1873-1957), mineralogist, University of Toronto, Canada.
Help on Name Pronunciation: Name Pronunciation: Parsonsite + Pronunciation Say PARSONSITE
Help on Synonym: Synonym: ICSD 89832
  PDF 12-259
 

Parsonsite Image

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  Parsonsite

Comments: Bright yellow parsonsite crystals on matrix.
Location: La Chaux, France. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Parsonsite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.6589:1:0.6423
Help on Cell Dimensions: Cell Dimensions: a = 6.842, b = 10.383, c = 6.67, Z = 2; alpha = 101.26°, beta = 98.174°, gamma = 86.378° V = 459.08 Den(Calc)= 6.59
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.253(1), 3.283(1), 4.233(0.65),
 

Physical Properties of Parsonsite

Help on Cleavage: Cleavage: {010} Indistinct
Help on Color: Color: Brown, Greenish brown, Yellow, Yellow brown, Light yellow.
Help on Density: Density: 5.72 - 6.29, Average = 6
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Habit: Habit: Pseudo Hexagonal - Crystals show a hexagonal outline.
Help on Hardness: Hardness: 2.5-3 - Finger Nail-Calcite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Subadamantine
Help on Streak: Streak: white
 

Optical Properties of Parsonsite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.071 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.023 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1337,KPDmeas= 0.1465,KC= 0.1369
Ncalc = 1.78 - 1.9
Help on Optical Data: Optical Data: Biaxial (-), a=1.87, g=1.89, bire=0.0200, 2V(Meas)=11-26.
Help on Pleochroism (x): Pleochroism (x): none.
Help on Pleochroism (y): Pleochroism (y): none.
Help on Pleochroism (z): Pleochroism (z): none.
 

Calculated Properties of Parsonsite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.58 gm/cc
note: Specific Gravity of Parsonsite =6.58 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.1
Boson Index = 0.9
Help on Photoelectric: Photoelectric: PEParsonsite =1,523.92 barns/electron
U=PEParsonsite x relectron=8,503.03 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 1,889,797.59 (Gamma Ray American Petroleum Institute Units)
Concentration of Parsonsite per GRapi unit = 529.16 (PPB)

Parsonsite 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) 16.10 ± 4.02 grams of pure Parsonsite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 1609.5 ±402.38 grams of pure Parsonsite .

Estimated Radioactivity from Parsonsite - 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 / 6.62 cm 46,800,447 1.26E-03 1,889,797.59 621.30
100 gm / 3.07 cm 4,680,045 1.26E-04 188,979.76 62.13
10 gm / 1.43 cm 468,004 1.26E-05 18,897.98 6.21
1 gm / 6.62 mm 46,800 1.26E-06 1,889.80 0.62
0.1 gm / 3.07 mm 4,680 1.26E-07 188.98 0.06
0.01 gm / 1.43 mm 468 1.26E-08 18.90 0.01
0.001 gm / 0.66 mm 47 1.26E-09 1.89 0.00

Weight of pure Parsonsite in grams (gm) and Calculated Diameter of a Sphere with a Density of 6.58 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
 

Parsonsite Classification

Help on  Dana Class: Dana Class: 40.02a.31.01 (40)Hydrated Phosphates, etc
  (40.02a)where A++ (B++)2 (XO4) � x(H2O), containing (UO2)++
  (40.02a.31)Dana Group
 
40.02a.31.01 Parsonsite Pb2(UO2)(PO4)2•2(H2O) P1 1
Help on  Strunz Class: Strunz Class: 08.EA.10 08 - PHOSPHATES, ARSENATES, VANADATES
  08.E - Uranyl Phosphates and Arsenates
  08.EA -UO2:RO4 = 1:2
 
08.EA.10 Hallimondite Pb2(UO2)(AsO4)2 P1 1
 
08.EA.10 Parsonsite Pb2(UO2)(PO4)2•2(H2O) P1 1
 

Other Parsonsite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Parsonsite :
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 Parsonsite Specimen Label here :

Parsonsite

Pb2(UO2)(PO4)2•2(H2O)
Dana No: 40.02a.31.01 Strunz No: 08.EA.10
Locality:

 

Notes:

 

 
   
 


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