Sengierite Mineral Data

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.

Name Pronunciation:

Sengierite + Pronunciation

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 - Prismatic H-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),

Forms:

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Forms: ( 0 1 1) ( 0 1 0) ( 1 1 1) ( 1 1 0) ( 0 0 1)

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Physical Properties of Sengierite

Cleavage:

{001} Perfect

Color:

Green, Yellow green.

Density:

4.05

Diaphaneity:

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
Ncalc = 1.65 - 1.72

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:

Bulk Density (Electron Density)=3.58 gm/cc
note: Specific Gravity of Sengierite =4.05 gm/cc.

Fermion Index:

Fermion Index = 0.0038029122
Boson Index = 0.9961970878

Photoelectric:

PE_Sengierite=1,224.44 barns/electron
U=PE_Sengierite x r_electron=4,381.14 barns/cc.

Radioactivity:

GRapi = 3,566,751.97 (Gamma Ray American Petroleum Institute Units)
Concentration of Sengierite per GRapi unit = 280.37 (PPB)

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	84,780,501	2.29E-03	3,566,751.97	1,172.63
100 gm / 3.61 cm	8,478,050	2.29E-04	356,675.20	117.26
10 gm / 1.68 cm	847,805	2.29E-05	35,667.52	11.73
1 gm / 7.78 mm	84,781	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:

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

(42.06)where (AB)2 (XO4) Zq ï¿½ x(H2O)

(42.06.10)Dana Group

42.06.10.01 Sengierite Cu2(UO2)2V2O8•6(H2O) P 2₁/a 2/m

Strunz Class:

04.HB.10 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.H - V[5,6] Vanadates

04.HB -Uranyl Sorovanadates

04.HB.10 Sengierite Cu2(UO2)2V2O8•6(H2O) P 2₁/a 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 - 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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Sengierite

Cu2(UO2)2V2O8•6(H2O)
Dana No: 42.06.10.01 Strunz No: 04.HB.10
Locality:

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