Mineralogy Database

Sayrite Mineral Data

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General Sayrite Information

Help on Chemical  Formula: Chemical Formula: Pb2(UO2)5O6(OH)2•4(H2O)
Help on Composition: Composition: Molecular Weight = 1,966.61 gm
   Uranium   60.52 %  U    68.65 % UO2
   Hydrogen   0.51 %  H     4.58 % H2O
   Lead      21.07 %  Pb   22.70 % PbO
   Oxygen    17.90 %  O
            ______        ______ 
            100.00 %       95.93 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb2(UO2)5O6(OH)2•4(H2O)
Help on Environment: Environment: Alteration product of uraninite in the oxidized zone of a uranium orebody.
Help on IMA Status: IMA Status: Approved IMA 1983
Help on Locality: Locality: Shinkolobwe, Katanga Province, Congo (Shaba Province, Zaire). Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for David Sayre (1924- ), American crystallographer, State University of New York, Stony Brook, New York, USA.
Help on Name Pronunciation: Name Pronunciation: Sayrite Say SAYRITE
Help on Synonym: Synonym: ICSD 38374
  PDF 35-601
 

Sayrite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.5379:1:2.088
Help on Cell Dimensions: Cell Dimensions: a = 10.704, b = 6.96, c = 14.533, Z = 2; beta = 116.81° V = 966.32 Den(Calc)= 6.76
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.113(1), 3.512(0.9), 7.01(0.8),
 

Physical Properties of Sayrite

Help on Cleavage: Cleavage: {102} Distinct
Help on Color: Color: Yellow orange, Red orange.
Help on Density: Density: 6.76
 

Optical Properties of Sayrite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.222 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.222 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1398,KPDmeas= 0.1398,KC= 0.1144
Ncalc = 1.77
Help on Optical Data: Optical Data: Biaxial (-), b=1.94, g=1.95,
 

Calculated Properties of Sayrite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.57 gm/cc
note: Specific Gravity of Sayrite =6.76 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.05
Boson Index = 0.95
Help on Photoelectric: Photoelectric: PESayrite =2,059.44 barns/electron
U=PESayrite x relectron=11468.10 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 4,249,243.79 (Gamma Ray American Petroleum Institute Units)
Concentration of Sayrite per GRapi unit = 235.34 (PPB)

Sayrite 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) 7.16 ± 1.79 grams of pure Sayrite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 715.81 ±178.95 grams of pure Sayrite .

Estimated Radioactivity from Sayrite - 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 / 6.56 cm 108,326,404 2.93E-03 4,249,243.79 1,397.01
100 gm / 3.05 cm 10,832,640 2.93E-04 424,924.38 139.70
10 gm / 1.41 cm 1,083,264 2.93E-05 42,492.44 13.97
1 gm / 6.56 mm 108,326 2.93E-06 4,249.24 1.40
0.1 gm / 3.05 mm 10,833 2.93E-07 424.92 0.14
0.01 gm / 1.41 mm 1,083 2.93E-08 42.49 0.01
0.001 gm / 0.66 mm 108 2.93E-09 4.25 0.00

Weight of pure Sayrite in grams (gm) and Calculated Diameter of a Sphere with a Density of 6.76 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
 

Sayrite Classification

Help on  Dana Class: Dana Class: 05.09.06.01 (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
  (05.09.06)Dana Group
 
05.09.06.01 Sayrite Pb2(UO2)5O6(OH)2•4(H2O) P 21/c 2/m
Help on  Strunz Class: Strunz Class: 04.GB.50 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.50 Sayrite Pb2(UO2)5O6(OH)2•4(H2O) P 21/c 2/m
 

Other Sayrite Information

Help on References: References: NAME( AntBidBlaNic3) 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 Sayrite :
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
16 - WWW-MINCRYST

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

Sayrite

Pb2(UO2)5O6(OH)2•4(H2O)
Dana No: 05.09.06.01 Strunz No: 04.GB.50
Locality:

 

Notes: