General Sengierite Information
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Chemical Formula: |
Cu2(UO2)2V2O8·6(H2O) |
Composition: |
Molecular Weight = 1,005.12 gm |
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Uranium 47.36 % U 53.73 % UO2 |
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Vanadium 10.14 % V 18.10 % V2O5 |
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Copper 12.64 % Cu 15.83 % CuO |
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Hydrogen 1.20 % H 10.75 % H2O |
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Oxygen 28.65 % O |
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______ ______ |
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100.00 % 98.41 % = TOTAL OXIDE |
Empirical Formula: |
Cu2(UO2)2V5+2O8·6(H2O) |
Environment: |
Secondary mineral in uranium-bearing Cu deposits. |
IMA Status: |
Valid Species (Pre-IMA) 1949 |
Locality: |
Luiswishi, Elizabethville-Jadotville area, Shava, Zaire. Link to MinDat.org Location Data. |
Name Origin: |
Named for Edgar Sengier (1879-1963), executive director, Societe Generale de Belgiwue. |
Synonym: |
ICSD 200704 |
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PDF 8-398 |
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Sengierite Image |
Images:
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Sengierite Crystallography
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Axial Ratios: |
a:b:c =1.1904:1:1.1327 |
Cell Dimensions: |
a = 10.599, b = 8.903, c = 10.085, Z = 2; beta = 103.42° V = 925.66 Den(Calc)= 3.61 |
Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/a |
X Ray Diffraction: |
By Intensity(I/Io): 9.81(1), 4.905(0.43), 3.218(0.19), |
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Physical Properties of Sengierite
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Cleavage: |
[001] Perfect |
Color: |
Green, Yellow green. |
Density: |
4.05 |
Diaphaniety: |
Transparent |
Fracture: |
Brittle - Generally displayed by glasses and most non-metallic minerals. |
Habit: |
Blocky - Crystal shape tends to be equant (e.g. feldspars). |
Habit: |
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). |
Hardness: |
2.5 - Finger Nail |
Luminescence: |
Radioactive. |
Luster: |
Vitreous - Adamantine |
Streak: |
light green |
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Optical Properties of Sengierite
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Gladstone-Dale: |
CI meas= -0.216 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= -0.364 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2438,KPDmeas= 0.2173,KC= 0.1787 |
Optical Data: |
Biaxial (-), a=1.77, b=1.92-1.94, g=1.94, bire=0.1700, 2V(Calc)=0-36, 2V(Meas)=~37. Dispersion r < v strong. |
Pleochroism (x): |
blue green. |
Pleochroism (y): |
olive green. |
Pleochroism (z): |
yellow green. |
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Calculated Properties of Sengierite
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Electron Density: |
relectron=3.58 gm/cc note: rSengierite =4.05 gm/cc. |
Fermion Index |
Fermion Index = 0.0038 Boson Index = 0.9962 |
Photoelectric: |
PESengierite =1,224.44 barns/electron U=PESengierite x relectron=4,381.14 barns/cc. |
Radioactivity: |
GRapi = 3,566,750.26 (Gamma Ray American Petroleum Institute Units)
Sengierite 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)
8.53 ± 2.13 grams of pure Sengierite .
Estimated Maximum U.S. Postal Shipping Size
(10 mRem/hr limit, Unshielded 100 cm box)
852.78 ±213.20 grams of pure Sengierite .
Estimated Radioactivity from Sengierite - 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 / 7.78 cm |
84,780,486 |
2.29E-03 |
3,566,750.26 |
1,172.63 |
| 100 gm / 3.61 cm |
8,478,049 |
2.29E-04 |
356,675.03 |
117.26 |
| 10 gm / 1.68 cm |
847,805 |
2.29E-05 |
35,667.50 |
11.73 |
| 1 gm / 7.78 mm |
84,780 |
2.29E-06 |
3,566.75 |
1.17 |
| 0.1 gm / 3.61 mm |
8,478 |
2.29E-07 |
356.68 |
0.12 |
| 0.01 gm / 1.68 mm |
848 |
2.29E-08 |
35.67 |
0.01 |
| 0.001 gm / 0.78 mm |
85 |
2.29E-09 |
3.57 |
0.00 |
Weight of pure Sengierite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.05 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
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Sengierite Classification
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Dana Class: |
42.6.10.1 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen |
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(42.6)where (AB)2 (XO4) Zq · x(H2O) |
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(42.6.10)Dana Group |
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42.6.10.1 Sengierite Cu2(UO2)2V2O8·6(H2O) P 21/a 2/m |
Strunz Class: |
VII/E.11-30 VII - Phosphates, Arsenates and Vanadates |
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VII/E - Uranylphosphates and uranylvanadates with: [UO2]2+ - [PO4 | AsO4]3- and [UO2]2+ - [V2O8]6-, uranyl-groupvanadates with [UO2]2+ - [V2O8]6- |
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VII/E.11 - Tyuyamunite series |
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VII/E.11-10 Vanuralite Al(UO2)2(VO4)2(OH)·11(H2O) A2/a 2/m |
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VII/E.11-20 Metavanuralite Al(UO2)2(VO4)2(OH)·8(H2O) P 1or P1 Tri |
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VII/E.11-30 Sengierite Cu2(UO2)2V2O8·6(H2O) P 21/a 2/m |
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VII/E.11-40 Strelkinite Na2(UO2)2V2O8·6(H2O) Pnmm,Pnm2 Ortho |
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VII/E.11-50 Carnotite K2(UO2)2V2O8·3(H2O) P 21/a 2/m |
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VII/E.11-60 Margaritasite (Cs,K,H3O)2(UO2)2V2O8·(H2O) P 21/a 2/m |
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VII/E.11-70 Vanuranylite? (H3O,Ba,Ca,K)1.6(UO2)2V2O8·4(H2O)(?) C 2/c ? 2/m |
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VII/E.11-80 Tyuyamunite Ca(UO2)2V2O8·5-8(H2O) Pnan 2/m 2/m 2/m |
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VII/E.11-90 Metatyuyamunite Ca(UO2)2V2O8·3(H2O) Pnam 2/m 2/m 2/m |
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VII/E.11-100 Francevillite (Ba,Pb)(UO2)2V2O8·5(H2O) Pcan 2/m 2/m 2/m |
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VII/E.11-110 Curienite Pb(UO2)2V2O8·5(H2O) Pcan 2/m 2/m 2/m |
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Other Sengierite Information
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References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8) |
See Also: |
Links to other databases for Sengierite :
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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Sengierite
Cu2(UO2)2V2O8·6(H2O)
Dana No: 42.6.10.1 Strunz No: VII/E.11-30
Locality:
Notes:
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