Phosphowalpurgite Mineral Data

General Phosphowalpurgite Information

Chemical Formula:

(UO2)Bi4(PO4)O4•2(H2O)

Composition:

Molecular Weight = 1,391.69 gm

Calcium 0.23 % Ca 0.32 % CaO

Uranium 15.56 % U 17.66 % UO₂

Vanadium 0.07 % V 0.13 % V₂O₅

Iron 0.28 % Fe 0.40 % Fe₂O₃

Copper 0.23 % Cu 0.29 % CuO

Silicon 0.08 % Si 0.17 % SiO₂

Bismuth 58.71 % Bi 65.46 % Bi₂O₃

Arsenic 2.69 % As 4.13 % As₂O₅

Phosphorus 3.34 % P 7.65 % P₂O₅

Hydrogen 0.29 % H 2.59 % H₂O

Lead 0.15 % Pb 0.16 % PbO

Oxygen 18.36 % O

______ ______

100.00 % 98.95 % = TOTAL OXIDE

Empirical Formula:

(UO₂)_0.91Ca_0.08Fe³⁺_0.07Cu_0.05Pb_0.01Bi_3.91O_3.91(PO₄)_1.5(AsO₄)_0.5(SiO₄)_0.04(VO₄)_0.02·2(H₂O)

Environment:

Occurs as small clusters in fissure and cavities in quartz gangue from the mine dump. Mineral is formed by the supergene alteration of uraninite and bismuth sulfides.

IMA Status:

Approved IMA 2004 (Dana # Added)

Locality:

Ore depost near Smrkovec,k in western Bohemia, Czech Republic. Link to MinDat.org Location Data.

Name Origin:

Named as the phosphate (PO4---) analogue of walpurgite.

Synonym:

IMA2001-062

Phosphowalpurgite Image

Images:

Phosphowalpurgite

Comments: Scanning electron photomicrograph of tabular crystals (up to 330 microm) of phosphowalpurgite, (CanMin, 42:966)..
Location: Old mine dumps of an abandoned small ore deposit near Smrkovec, located 10 km NNE of MariÃ¡nskÃ© LÃ¡zn?, SlavkovskÃ½ Les Mountains, western Bohemia, Czech Republic. Scale: Picture Size 515 µ-m.
© Canadian Mineralogist

Phosphowalpurgite Crystallography

Axial Ratios:

a:b:c =0.6895:1:0.5336

Cell Dimensions:

a = 7.06, b = 10.238, c = 5.464, Z = 1; alpha = 101.22°, beta = 109.93°, gamma = 87.93° V = 363.95 Den(Calc)= 6.35

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 10.06(1)(010), 3.084(0.95)(121,211), 3.125(0.86)(210), 3.251(0.72)(021,121), 3.005(0.52)(131), 3.346(0.43)(030,201

Physical Properties of Phosphowalpurgite

Cleavage:

{010} Perfect

Color:

Brownish gray.

Diaphaneity:

Translucent

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Habit:

Euhedral Crystals - Occurs as well-formed crystals showing good external form.

Hardness:

4-5 - Fluorite-Apatite

Luster:

Vitreous - Adamantine

Streak:

light brownish gray

Optical Properties of Phosphowalpurgite

Gladstone-Dale:

CI calc= 0.008 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1496,KC= 0.1507
Ncalc = 1.96

Optical Data:

Biaxial (?), a=1.9, g=2, bire=0.1000

Calculated Properties of Phosphowalpurgite

Electron Density:

Bulk Density (Electron Density)=5.35 gm/cc
note: Specific Gravity of Phosphowalpurgite =6.35 gm/cc.

Fermion Index:

Fermion Index = 0.0016409975
Boson Index = 0.9983590025

Photoelectric:

PE_{Phosphowalpurgite}=1,547.28 barns/electron
U=PE_{Phosphowalpurgite} x r_electron=8,270.30 barns/cc.

Radioactivity:

GRapi = 1,116,707.99 (Gamma Ray American Petroleum Institute Units)
Concentration of Phosphowalpurgite per GRapi unit = 895.49 (PPB)

Phosphowalpurgite 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) 27.24 ± 6.81 grams of pure Phosphowalpurgite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 2723.8 ±680.94 grams of pure Phosphowalpurgite .

**Estimated Radioactivity from Phosphowalpurgite** - very strong
Specimen Size Weight/Volume (Sphere) *	Calculated Activity Becquerels (Bq)	Calculated Activity Curies (Ci)	Estimated Activity GR(api)	Estimated Exposure (mRem**)/hr If Held in Hand For One Hour
1000 gm / 6.70 cm	27,860,024	7.53E-04	1,116,707.99	367.14
100 gm / 3.11 cm	2,786,002	7.53E-05	111,670.80	36.71
10 gm / 1.44 cm	278,600	7.53E-06	11,167.08	3.67
1 gm / 6.70 mm	27,860	7.53E-07	1,116.71	0.37
0.1 gm / 3.11 mm	2,786	7.53E-08	111.67	0.04
0.01 gm / 1.44 mm	279	7.53E-09	11.17	0.00
0.001 gm / 0.67 mm	28	7.53E-10	1.12	0.00

Weight of pure Phosphowalpurgite in grams (gm) and Calculated Diameter of a Sphere with a Density of 6.35 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

Phosphowalpurgite Classification

Dana Class:

40.05.09.03 (40)Hydrated Phosphates, etc

(40.05)with miscellaneous formulae

(40.05.09)Walpurgite Group

40.05.09.01 Walpurgite Bi4(UO2)(AsO4)2O4•2(H2O) P1 1

40.05.09.02 Orthowalpurgite (UO2)Bi4O4(AsO4)2•2(H2O) Pbcm 2/m 2/m 2/m

40.05.09.03 Phosphowalpurgite! (UO2)Bi4(PO4)O4•2(H2O) P1 1

Strunz Class:

08.EA.05 08 - PHOSPHATES, ARSENATES, VANADATES

08.E - Uranyl Phosphates and Arsenates

08.EA -UO2:RO4 = 1:2

08.EA.05 Orthowalpurgite (UO2)Bi4O4(AsO4)2•2(H2O) Pbcm 2/m 2/m 2/m

08.EA.05 Walpurgite Bi4(UO2)(AsO4)2O4•2(H2O) P1 1

08.EA.05 Phosphowalpurgite! (UO2)Bi4(PO4)O4•2(H2O) P1 1

Other Phosphowalpurgite Information

References:

NAME( CanMin 42:963) PHYS. PROP.(CanMin 42:963) OPTIC PROP.(CanMin 42:963)

See Also:

Links to other databases for Phosphowalpurgite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
11 - Uranium Minerals

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

Phosphowalpurgite

(UO2)Bi4(PO4)O4•2(H2O)
Dana No: 40.05.09.03 Strunz No: 08.EA.05
Locality:

Notes: