Sayrite Mineral Data

Sayrite Mineral Data +

General Sayrite Information

Chemical Formula:

Pb2(UO2)5O6(OH)2·4(H2O)

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

Empirical Formula:

Pb₂(UO₂)₅O₆(OH)₂·4(H₂O)

IMA Status:

Approved IMA 1983

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 38374

PDF 35-601

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Sayrite Crystallography

Axial Ratios:

a:b:c =1.5379:1:2.088

Cell Dimensions:

a = 10.704, b = 6.96, c = 14.533, Z = 2; beta = 116.81° V = 966.32 Den(Calc)= 6.76

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/c

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.113(1), 3.512(0.9), 7.01(0.8),

Physical Properties of Sayrite

Cleavage:

[102] Distinct

Color:

Yellow orange, Red orange.

Density:

6.76

Optical Properties of Sayrite

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

Optical Data:

Biaxial (-), b=1.94, g=1.95,

Calculated Properties of Sayrite

Electron Density:

r_electron=5.57 gm/cc
note: r_Sayrite=6.76 gm/cc.

Fermion Index

Fermion Index = 0.05101
Boson Index = 0.94899

Photoelectric:

PE_Sayrite=2,059.44 barns/electron
U=PE_Sayrite x r_electron=11468.10 barns/cc.

Radioactivity:

GRapi = 4,249,242.27 (Gamma Ray American Petroleum Institute Units)

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	108,326,397	2.93E-03	4,249,242.27	1,397.01
100 gm / 3.05 cm	10,832,640	2.93E-04	424,924.23	139.70
10 gm / 1.41 cm	1,083,264	2.93E-05	42,492.42	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

Dana Class:

5.9.6.1 (5)Oxides Containing Uranium and Thorium

(5.9)with a cation charge of 6+ containing Pb or Bi and some water of hydration or hydroxyl

(5.9.6)Dana Group

5.9.6.1 Sayrite Pb2(UO2)5O6(OH)2·4(H2O) P 2₁/c 2/m

Strunz Class:

IV/H.07-40 IV - Oxides

IV/H - Uranyl ([UO2]2+) hydroxides and hydrates

IV/H.07 - Fourmarierite - Masuyite series

IV/H.07-10 Fourmarierite Pb(UO2)4O3(OH)4·4(H2O) Bb21m mm2

IV/H.07-20 Vandendriesscheite Pb(UO2)10O6(OH)11·11(H2O) P bca 2/m 2/m 2/m

IV/H.07-30 Metavandendriesscheite PbU7O22·n(H2O)(n<12) Pmma,Pm2a Ortho

IV/H.07-40 Sayrite Pb2(UO2)5O6(OH)2·4(H2O) P 2₁/c 2/m

IV/H.07-45 Spriggite! Pb3[(UO2)6O8(OH)2](H2O)x;x~3 C 2/c 2/m

IV/H.07-50 Curite Pb3x(H2O)2[(UO2)4x(OH)3-x]2,x~0.5 Pnam 2/m 2/m 2/m

IV/H.07-60 Richetite PbU4O13·4(H2O) P1 or P1 Tri

IV/H.07-70 Masuyite Pb[(UO2)3O3(OH)2]·3(H2O) Pn m

Other Sayrite Information

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Sayrite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - Uranium Minerals 13 - WWW-MINCRYST 14 -École des Mines de Paris

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Sayrite

Pb2(UO2)5O6(OH)2·4(H2O)
Dana No: 5.9.6.1 Strunz No: IV/H.07-40
Locality:

Notes: