Sengierite Mineral Data

Sengierite Mineral Data +

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General Sengierite Information

Chemical Formula:

Cu2(UO2)2V2O8·6(H2O)

Composition:

Molecular Weight = 1,005.12 gm

Uranium 47.36 % U 53.73 % UO₂

Vanadium 10.14 % V 18.10 % V₂O₅

Copper 12.64 % Cu 15.83 % CuO

Hydrogen 1.20 % H 10.75 % H₂O

Oxygen 28.65 % O

______ ______

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

PDF 8-398

Sengierite Image

Images:

Sengierite

Comments: Green, tabular, crystals of sengierite on matrix.
Location: Lubumbashi, Shaba, Democratic Republic of the Congo. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Sengierite Crystallography

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

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

By Intensity(I/I_o): 9.81(1), 4.905(0.43), 3.218(0.19),

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Physical Properties of Sengierite

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

Optical Properties of Sengierite

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.

Calculated Properties of Sengierite

Electron Density:

r_electron=3.58 gm/cc
note: r_Sengierite=4.05 gm/cc.

Fermion Index

Fermion Index = 0.0038
Boson Index = 0.9962

Photoelectric:

PE_Sengierite=1,224.44 barns/electron
U=PE_Sengierite x r_electron=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

Sengierite Classification

Dana Class:

42.6.10.1 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.6)where (AB)2 (XO4) Zq · x(H2O)

(42.6.10)Dana Group

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

VII/E - Uranylphosphates and uranylvanadates with: [UO2]2+ - [PO4 | AsO4]3- and [UO2]2+ - [V2O8]6-, uranyl-groupvanadates with [UO2]2+ - [V2O8]6-

VII/E.11 - Tyuyamunite series

VII/E.11-10 Vanuralite Al(UO2)2(VO4)2(OH)·11(H2O) A2/a 2/m

VII/E.11-20 Metavanuralite Al(UO2)2(VO4)2(OH)·8(H2O) P 1or P1 Tri

VII/E.11-30 Sengierite Cu2(UO2)2V2O8·6(H2O) P 2₁/a 2/m

VII/E.11-40 Strelkinite Na2(UO2)2V2O8·6(H2O) Pnmm,Pnm2 Ortho

VII/E.11-50 Carnotite K2(UO2)2V2O8·3(H2O) P 2₁/a 2/m

VII/E.11-60 Margaritasite (Cs,K,H3O)2(UO2)2V2O8·(H2O) P 2₁/a 2/m

VII/E.11-70 Vanuranylite? (H3O,Ba,Ca,K)1.6(UO2)2V2O8·4(H2O)(?) C 2/c ? 2/m

VII/E.11-80 Tyuyamunite Ca(UO2)2V2O8·5-8(H2O) Pnan 2/m 2/m 2/m

VII/E.11-90 Metatyuyamunite Ca(UO2)2V2O8·3(H2O) Pnam 2/m 2/m 2/m

VII/E.11-100 Francevillite (Ba,Pb)(UO2)2V2O8·5(H2O) Pcan 2/m 2/m 2/m

VII/E.11-110 Curienite Pb(UO2)2V2O8·5(H2O) Pcan 2/m 2/m 2/m

Other Sengierite Information

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

Sengierite

Cu2(UO2)2V2O8·6(H2O)
Dana No: 42.6.10.1 Strunz No: VII/E.11-30
Locality:

Notes: