Phuralumite Mineral Data

General Phuralumite Information

Chemical Formula:

Al2(UO2)3(PO4)2(OH)6•10(H2O)

Composition:

Molecular Weight = 1,336.19 gm

Uranium 53.44 % U 60.63 % UO₂

Aluminum 4.04 % Al 7.63 % Al₂O₃

Phosphorus 4.64 % P 10.62 % P₂O₅

Hydrogen 1.96 % H 17.53 % H₂O

Oxygen 35.92 % O

______ ______

100.00 % 96.41 % = TOTAL OXIDE

Empirical Formula:

Al₂(UO₂)₃(PO₄)₂(OH)₆•10(H₂O)

Environment:

Secondary mineral found in beryl-coloumbite pegmatites associated with other U-, and Al-bearing phosphates.

IMA Status:

Approved IMA 1979

Locality:

Kobokobo Pegmatite, Lusungu River District, Kivu, Congo (Zaïre) Link to MinDat.org Location Data.

Name Origin:

Named for the composition of PHosphate, URanium, and ALUMinum.

Name Pronunciation:

Phuralumite + Pronunciation

Synonym:

ICSD 8187

PDF 33-38

Phuralumite Image

Images:

Phuralumite

Comments: Yellow crystals of phuralumite scattered on white matrix.
Location: Kobokobo Pegmatite, Lusungu River District, Kivu, Congo (ZaÃ¯re). Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Phuralumite Crystallography

Axial Ratios:

a:b:c =0.6614:1:0.4507

Cell Dimensions:

a = 13.836, b = 20.918, c = 9.428, Z = 4; beta = 112.44° V = 2,522.05 Den(Calc)= 3.52

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): 10.4(1), 3.08(0.8), 5.17(0.7),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
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Piret P , Piret-Meunier J , Declercq J P , Acta Crystallographica, Section B , 35 (1979) p.1880-1882, Structure of phuralumite, Locality: Kobokobo, Kivu, Zaire

Physical Properties of Phuralumite

Cleavage:

{???} Perfect

Color:

Lemon.

Density:

3.5

Diaphaneity:

Transparent

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

3 - Calcite

Luminescence:

Non-fluorescent and radioactive.

Luster:

Vitreous (Glassy)

Streak:

yellow white

Optical Properties of Phuralumite

Gladstone-Dale:

CI meas= -0.102 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.096 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1704,KPDmeas= 0.1713,KC= 0.1555
Ncalc = 1.54 - 1.55

Optical Data:

Biaxial (-), a=1.559, b=1.616, g=1.624, bire=0.0650, 2V(Calc)=38, 2V(Meas)=40.

Pleochroism (y):

colorless.

Pleochroism (z):

pale yellow.

Calculated Properties of Phuralumite

Electron Density:

Bulk Density (Electron Density)=3.15 gm/cc
note: Specific Gravity of Phuralumite =3.52 gm/cc.

Fermion Index:

Fermion Index = 0.0040232031
Boson Index = 0.9959767969

Photoelectric:

PE_Phuralumite=1,355.02 barns/electron
U=PE_Phuralumite x r_electron=4,269.26 barns/cc.

Radioactivity:

GRapi = 4,077,389.44 (Gamma Ray American Petroleum Institute Units)
Concentration of Phuralumite per GRapi unit = 245.25 (PPB)

Phuralumite 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) 7.46 ± 1.86 grams of pure Phuralumite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 745.98 ±186.50 grams of pure Phuralumite .

**Estimated Radioactivity from Phuralumite** - 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 / 8.16 cm	95,661,490	2.59E-03	4,077,389.44	1,340.51
100 gm / 3.79 cm	9,566,149	2.59E-04	407,738.94	134.05
10 gm / 1.76 cm	956,615	2.59E-05	40,773.89	13.41
1 gm / 8.16 mm	95,661	2.59E-06	4,077.39	1.34
0.1 gm / 3.79 mm	9,566	2.59E-07	407.74	0.13
0.01 gm / 1.76 mm	957	2.59E-08	40.77	0.01
0.001 gm / 0.82 mm	96	2.59E-09	4.08	0.00

Weight of pure Phuralumite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.52 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

Phuralumite Classification

Dana Class:

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

(42.04)where (AB)5 (XO4)2 Zq · x(H2O)

(42.04.06)Phuralumite Group

42.04.06.01 Phuralumite Al2(UO2)3(PO4)2(OH)6•10(H2O) P 2₁/a 2/m

42.04.06.02 Lakebogaite! CaNaFe2H(UO2)2(PO4)4(OH)2(H2O)8 Cc m

Strunz Class:

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

08.E - Uranyl Phosphates and Arsenates

08.EC -UO2:RO4 = 3:2

08.EC.05 Francoisite-(Nd) (Nd,Y,Sm,Ce)(UO2)3(PO4)2O(OH)•6(H2O) P 2₁/c 2/m

08.EC.05 Phuralumite Al2(UO2)3(PO4)2(OH)6•10(H2O) P 2₁/a 2/m

08.EC.05 Upalite Al(UO2)3(PO4)2O(OH)•7(H2O) P 2₁/a 2/m

08.EC.05 Francoisite-(Ce)! (Ce,Nd,Ca)[(UO2)3O(OH)(PO4)2]•6(H2O) P 2₁/c 2/m

Other Phuralumite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Phuralumite :
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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Print or Cut-and-Paste your Phuralumite Specimen Label here :

Phuralumite

Al2(UO2)3(PO4)2(OH)6•10(H2O)
Dana No: 42.04.06.01 Strunz No: 08.EC.05
Locality:

Notes: