Richetite Mineral Data (original) (raw)

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

Click Here for Larger Richetite Image in a New Browser Window Images:

Click Here for Larger Richetite Image 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:

TriclinicSpace 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),

Click Here for Large Richetite Structure Window Crystal Structure:

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| | Burns P C , The Canadian Mineralogist , 36 (1998) p.187-199, The structure of richetite, a rare lead uranyl oxide hydrate | | ---------------------------------------------------------------------------------------------------------------------------- |

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

SpecimenSizeWeight/Volume(Sphere) * CalculatedActivityBecquerels(Bq) CalculatedActivityCuries (Ci) EstimatedActivityGR(api) EstimatedExposure(mRem**)/hrIf Held in HandFor 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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Print or Cut-and-Paste your Richetite Specimen Label here :

Richetite

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

Notes: