Sabugalite Mineral Data

General Sabugalite Information

Chemical Formula:

HAl(UO2)4(PO4)4•16(H2O)

Composition:

Molecular Weight = 1,776.23 gm

Uranium 53.60 % U 60.81 % UO₂

Aluminum 1.52 % Al 2.87 % Al₂O₃

Phosphorus 6.98 % P 15.98 % P₂O₅

Hydrogen 1.87 % H 16.73 % H₂O

Oxygen 36.03 % O

______ ______

100.00 % 96.40 % = TOTAL OXIDE

Empirical Formula:

HAl(UO₂)₄(PO₄)₄•16(H₂O)

Environment:

Secondary mineral formed in the oxidized zone of uranium veins.

IMA Status:

Valid Species (Pre-IMA) 1951

Locality:

Quarta Feira mine, Portugal Link to MinDat.org Location Data.

Name Origin:

Name for Sabugal Co., Portugal, in which the mineral was first found.

Name Pronunciation:

Sabugalite + Pronunciation

Sabugalite Image

Images:

Sabugalite

Comments: Platy sabugalite crystals.
Location: Margnac, Haute-Vienne, France. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Images:

Sabugalite

Comments: Squarish, platy, pale yellowish green sabugalite crystals.
Location: Sabugal County, Beira Alta Province, Portugal. Scale: Picture size 3 mm.
© Paul M. Schumacher

Sabugalite Crystallography

Axial Ratios:

a:c = 1:2.77298

Cell Dimensions:

a = 6.96, c = 19.3, Z = 1; V = 934.92 Den(Calc)= 3.15

Crystal System:

Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: I 4/mmm

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

By Intensity(I/I_o): 9.69(1), 4.86(0.9), 3.47(0.8),

Physical Properties of Sabugalite

Cleavage:

{001} Perfect

Color:

Light yellow, Lemon.

Density:

3.2

Diaphaneity:

Transparent to Translucent

Hardness:

2.5 - Finger Nail

Luminescence:

Fluorescent, Short UV=lemon-yellow, Long UV=lemon-yellow.

Luster:

Vitreous (Glassy)

Streak:

yellow white

Optical Properties of Sabugalite

Gladstone-Dale:

CI meas= -0.177 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.195 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1828,KPDmeas= 0.1799,KC= 0.1529
Ncalc = 1.48 - 1.49

Optical Data:

Biaxial (-), a=1.564, b=1.581, g=1.582, bire=0.0180

Pleochroism (x):

colorless.

Pleochroism (y):

colorless.

Pleochroism (z):

colorless.

Calculated Properties of Sabugalite

Electron Density:

Bulk Density (Electron Density)=2.86 gm/cc
note: Specific Gravity of Sabugalite =3.20 gm/cc.

Fermion Index:

Fermion Index = 0.0040351808
Boson Index = 0.9959648192

Photoelectric:

PE_Sabugalite=1,360.75 barns/electron
U=PE_Sabugalite x r_electron=3,892.95 barns/cc.

Radioactivity:

GRapi = 4,084,843.40 (Gamma Ray American Petroleum Institute Units)
Concentration of Sabugalite per GRapi unit = 244.81 (PPB)

Sabugalite 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) 7.45 ± 1.86 grams of pure Sabugalite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 744.62 ±186.16 grams of pure Sabugalite .

**Estimated Radioactivity from Sabugalite** - 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 / 8.42 cm	95,949,664	2.59E-03	4,084,843.40	1,342.96
100 gm / 3.91 cm	9,594,966	2.59E-04	408,484.34	134.30
10 gm / 1.81 cm	959,497	2.59E-05	40,848.43	13.43
1 gm / 8.42 mm	95,950	2.59E-06	4,084.84	1.34
0.1 gm / 3.91 mm	9,595	2.59E-07	408.48	0.13
0.01 gm / 1.81 mm	959	2.59E-08	40.85	0.01
0.001 gm / 0.84 mm	96	2.59E-09	4.08	0.00

Weight of pure Sabugalite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.20 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

Sabugalite Classification

Dana Class:

40.02a.24.01 (40)Hydrated Phosphates, etc

(40.02a)where A++ (B++)2 (XO4) � x(H2O), containing (UO2)++

(40.02a.24)Dana Group

40.02a.24.01 Sabugalite HAl(UO2)4(PO4)4•16(H2O) I 4/mmm 4/m 2/m 2/m

Strunz Class:

08.EB.55 08 - PHOSPHATES, ARSENATES, VANADATES

08.E - Uranyl Phosphates and Arsenates

08.EB -UO2:RO4 = 1:1

08.EB.55 Sabugalite HAl(UO2)4(PO4)4•16(H2O) I 4/mmm 4/m 2/m 2/m

Other Sabugalite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Sabugalite :
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

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Sabugalite

HAl(UO2)4(PO4)4•16(H2O)
Dana No: 40.02a.24.01 Strunz No: 08.EB.55
Locality:

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