Mineralogy Database

Richetite Mineral Data

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General Richetite Information

Help on Chemical  Formula: Chemical Formula: PbU++++++4O13•4(H2O)
Help on Composition: Composition: Molecular Weight = 1,439.37 gm
   Uranium   66.15 %  U    79.49 % UO3
   Hydrogen   0.56 %  H     5.01 % H2O
   Lead      14.40 %  Pb   15.51 % PbO
   Oxygen    18.90 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: PbU4O13•4(H2O)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1947
Help on Locality: Locality: Shinkolobwe mine, Shaba, Zaire. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Emile Richet (1884-1938), chief geologist, Union Miniere du Haut Katanga.
Help on Name Pronunciation: Name Pronunciation: Richetite + Pronunciation Say RICHETITE
Help on Synonym: Synonym: ICSD 85570
  PDF 30-370
 

Richetite Image

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  Richetite

Comments: Brown plates of richetite.
Location: Shinkolobwe mine, Katanga, Congo. Scale: See Image.
© Rruff Database

Richetite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.6666:1:1.3515
Help on Cell Dimensions: Cell Dimensions: a = 20.1, b = 12.06, c = 16.3, Z = 4; alpha = 113.8°, beta = 115.1°, gamma = 90.4° V = 3,273.74 Den(Calc)= 2.92
Help on Crystal System: Crystal System: Triclinic Space Group: P1 or P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.122(1), 7.12(0.8), 3.55(0.6),
 

Physical Properties of Richetite

Help on Cleavage: Cleavage: {001} Perfect, {010} Fair
Help on Color: Color: Black.
Help on Habit: Habit: Pseudo Hexagonal - Crystals show a hexagonal outline.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luster: Luster: Adamantine
 

Optical Properties of Richetite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= -1.46 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.3233,KC= 0.1314
Ncalc = 1.39
Help on Optical Data: Optical Data: Biaxial (-), a=1.9, b=2, g=2, bire=0.1000, 2V(Calc)=0, 2V(Meas)=large.
Help on Pleochroism (x): Pleochroism (x): pale brown.
Help on Pleochroism (y): Pleochroism (y): dull brown.
Help on Pleochroism (z): Pleochroism (z): dull brown.
 

Calculated Properties of Richetite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.47 gm/cc
note: Specific Gravity of Richetite =2.99 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PERichetite =2,086.02 barns/electron
U=PERichetite x relectron=5,147.93 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 4,653,670.36 (Gamma Ray American Petroleum Institute Units)
Concentration of Richetite per GRapi unit = 214.88 (PPB)

Richetite 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) 6.54 ± 1.63 grams of pure Richetite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 653.61 ±163.40 grams of pure Richetite .

Estimated Radioactivity from Richetite - 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 / 8.61 cm 118,405,150 3.20E-03 4,653,670.36 1,529.97
100 gm / 4.00 cm 11,840,515 3.20E-04 465,367.04 153.00
10 gm / 1.86 cm 1,184,052 3.20E-05 46,536.70 15.30
1 gm / 8.61 mm 118,405 3.20E-06 4,653.67 1.53
0.1 gm / 4.00 mm 11,841 3.20E-07 465.37 0.15
0.01 gm / 1.86 mm 1,184 3.20E-08 46.54 0.02
0.001 gm / 0.86 mm 118 3.20E-09 4.65 0.00

Weight of pure Richetite in grams (gm) and Calculated Diameter of a Sphere with a Density of 2.99 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
 

Richetite Classification

Help on  Dana Class: Dana Class: 05.09.05.01 (05)Oxides Containing Uranium and Thorium
  (05.09)with a cation charge of 6+ containing Pb or Bi and some water of hydration or hydroxyl
  (05.09.05)Dana Group
 
05.09.05.01 Richetite PbU4O13•4(H2O) P1 or P1 Tri
Help on  Strunz Class: Strunz Class: 04.GB.15 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.G - Uranyl Hydroxides
  04.GB -With additional cations (K, Ca, Ba, Pb, etc.); with mainly UO2(O,OH)5 pentagonal polyhedra
 
04.GB.15 Richetite PbU4O13•4(H2O) P1 or P1 Tri
 

Other Richetite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Richetite :
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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Richetite

PbU++++++4O13•4(H2O)
Dana No: 05.09.05.01 Strunz No: 04.GB.15
Locality:

 

Notes:

 

 
   
 


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