Masuyite Mineral Data + Say MASUYITE

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General Masuyite Information
Help on Chemical Formula: Chemical Formula: Pb[(UO2)3O3(OH)2]·3(H2O)
Help on Composition: Composition: Molecular Weight = 1,153.34 gm
   Uranium   61.91 %  U    70.24 % UO2
   Hydrogen   0.70 %  H     6.25 % H2O
   Lead      17.97 %  Pb   19.35 % PbO
   Oxygen    19.42 %  O
            ______        ______ 
            100.00 %       95.84 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb(UO2)3O3(OH)2·3(H2O)
Help on Environment: Environment: Crystals lining cavities in uraninite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1947
Help on Locality: Locality: Shinkolobwe uranium mine, Shaba Province, Democratic Republic of Congo. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Gustave Masuy (1905-1945), Belgian geologist, shot by the German occupiers at the end of World War II.
Help on Synonym: Synonym: ICSD 87743
  PDF 51-1575
 

Masuyite Image

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Masuyite

Comments: Bright reddish orange crystals of masuyite.
Location: Shinkolobwe mine, Tantara, Shaba, Democratic Republic of the Congo. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals
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Masuyite

Comments: Dark reddish brown aggregate of masuyite with green metatorbernite on matrix.
Location: Musonoi mine, Kolwezi, Shaba, (Katanga), Congo (Za?re). Scale: Picture size 2 mm.
© Paul M. Schumacher

Masuyite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.7467:1:0.9964
Help on Cell Dimensions: Cell Dimensions: a = 12.241, b = 7.008, c = 6.983, Z = 2; beta = 90.402° V = 599.02 Den(Calc)= 6.39
Help on Crystal System: Crystal System: Monoclinic - DomaticH-M Symbol (m) Space Group: Pn
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.08(1), 3.52(0.7), 3.12(0.5),
Click Here for Large Masuyite Structure Window Crystal Structure:

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Burns P C , Hanchar J M , The Canadian Mineralogist , 37 (1999) p.1483-1491, The structure of masuyite, Pb[(UO2)3O3(OH)2](H2O)3,, and its relationship to protasite

 

Physical Properties of Masuyite

Help on Cleavage: Cleavage: [001] Perfect, [010] Indistinct
Help on Color: Color: Brown orange, Carmine red, Red, Red orange.
Help on Density: Density: 5.08
Help on Diaphaniety: Diaphaniety: Transparent
Help on Habit: Habit: Pseudo Hexagonal - Crystals show a hexagonal outline.
Help on Habit: Habit: Twinning Common - Crystals are usually twinned.
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous (Glassy)
 

Optical Properties of Masuyite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.453 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.155 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1354,KPDmeas= 0.1703,KC= 0.1172
Help on Optical Data: Optical Data: Biaxial (-), a=1.785, b=1.895, g=1.915, bire=0.1300, 2V(Calc)=44, 2V(Meas)=50.
 

Calculated Properties of Masuyite

Help on Electron Density: Electron Density:

relectron=5.30 gm/cc
note: rMasuyite =6.39 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.04425
Boson Index = 0.95575
Help on Photoelectric: Photoelectric:

PEMasuyite =2,027.37 barns/electron
U=PEMasuyite x relectron=10738.25 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 4,374,479.01 (Gamma Ray American Petroleum Institute Units)

Masuyite 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) 6.95 ± 1.74 grams of pure Masuyite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 695.32 ±173.83 grams of pure Masuyite .

Estimated Radioactivity from Masuyite - 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 / 6.69 cm 110,827,080 3.00E-03 4,374,479.01 1,438.18
100 gm / 3.10 cm 11,082,708 3.00E-04 437,447.90 143.82
10 gm / 1.44 cm 1,108,271 3.00E-05 43,744.79 14.38
1 gm / 6.69 mm 110,827 3.00E-06 4,374.48 1.44
0.1 gm / 3.10 mm 11,083 3.00E-07 437.45 0.14
0.01 gm / 1.44 mm 1,108 3.00E-08 43.74 0.01
0.001 gm / 0.67 mm 111 3.00E-09 4.37 0.00

Weight of pure Masuyite in grams (gm) and Calculated Diameter of a Sphere with a Density of 6.39 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
 

Masuyite Classification
Help on Dana Class: Dana Class: 5.2.2.1 (5)Oxides Containing Uranium and Thorium
  (5.2)with a cation charge of 6+ (AO3) and hydrated
  (5.2.2)Dana Group
 
5.2.2.1 Masuyite Pb[(UO2)3O3(OH)2]·3(H2O) Pn m
Help on Strunz Class: Strunz Class: IV/H.07-70 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 Masuyite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(AmMin, vol 85, p 1565) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Masuyite :
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 -École des Mines de Paris

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Masuyite

Pb[(UO2)3O3(OH)2]·3(H2O)
Dana No: 5.2.2.1 Strunz No: IV/H.07-70
Locality:

 

Notes:

 
 
   
 
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