Pseudo-autunite Mineral Data

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General Pseudo-autunite Information

Chemical Formula:

(H3O)4Ca2(UO2)2(PO4)4•5(H2O) (?)

Composition:

Molecular Weight = 1,166.27 gm

Calcium 6.87 % Ca 9.62 % CaO

Uranium 40.82 % U 46.31 % UO₂

Phosphorus 10.62 % P 24.34 % P₂O₅

Hydrogen 1.90 % H 16.99 % H₂O

Oxygen 39.78 % O

______ ______

100.00 % 97.26 % = TOTAL OXIDE

Empirical Formula:

(H₃O)₄Ca₂(UO₂)₂(PO₄)₄•5(H₂O)

Environment:

Fissures and cavities of albite-acmite veins in the contact zone of ultrabasic-alkalic rocks.

IMA Status:

Not Approved IMA 1968

Locality:

Northern Karelia, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for its similarity to autunite and meta-autunite in composition and occurrence.

Synonym:

Discredited

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Pseudo-autunite Crystallography

Axial Ratios:

a:b:c =1:1:1.8452

Cell Dimensions:

a = 6.964, b = 6.964, c = 12.85, Z = 1; V = 623.19 Den(Calc)= 3.11

Crystal System:

OrthorhombicSpace Group: Unk

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

By Intensity(I/I_o): 3.25(1), 6.2(1), 1.92(0.9),

Physical Properties of Pseudo-autunite

Color:

Yellow, White.

Density:

3.28

Habit:

Platy - Sheet forms (e.g. micas).

Habit:

Pseudo Hexagonal - Crystals show a hexagonal outline.

Hardness:

2-3 - Gypsum-Calcite

Luminescence:

Fluorescent and phosphorescent, Short UV=intense yellowish green, Long UV=yellowish green.

Optical Properties of Pseudo-autunite

Gladstone-Dale:

CI meas= -0.011 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.066 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.18,KPDmeas= 0.1706,KC= 0.1688
Ncalc = 1.53 - 1.55

Optical Data:

Biaxial (-), a=1.541, b=1.568, g=1.57, bire=0.0290, 2V(Calc)=30, 2V(Meas)=32.

Calculated Properties of Pseudo-autunite

Electron Density:

Bulk Density (Electron Density)=3.03 gm/cc
note: Specific Gravity of Pseudo-autunite =3.28 gm/cc.

Fermion Index:

Fermion Index = 0.0032255628
Boson Index = 0.9967744372

Photoelectric:

PE_{Pseudo-autunite}=1,005.29 barns/electron
U=PE_{Pseudo-autunite} x r_electron=3,042.13 barns/cc.

Radioactivity:

GRapi = 3,210,039.45 (Gamma Ray American Petroleum Institute Units)
Concentration of Pseudo-autunite per GRapi unit = 311.52 (PPB)

Pseudo-autunite 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) 9.48 ± 2.37 grams of pure Pseudo-autunite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 947.55 ±236.89 grams of pure Pseudo-autunite .

**Estimated Radioactivity from Pseudo-autunite** - 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 / 8.35 cm	73,065,953	1.97E-03	3,210,039.45	1,055.36
100 gm / 3.88 cm	7,306,595	1.97E-04	321,003.95	105.54
10 gm / 1.80 cm	730,660	1.97E-05	32,100.39	10.55
1 gm / 8.35 mm	73,066	1.97E-06	3,210.04	1.06
0.1 gm / 3.88 mm	7,307	1.97E-07	321.00	0.11
0.01 gm / 1.80 mm	731	1.97E-08	32.10	0.01
0.001 gm / 0.84 mm	73	1.97E-09	3.21	0.00

Weight of pure Pseudo-autunite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.28 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

Pseudo-autunite Classification

Dana Class:

40.02a.01.03 (40)Hydrated Phosphates, etc

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

(40.02a.01)Autunite Group

40.02a.01.01 Autunite Ca(UO2)2(PO4)2•10-12(H2O) I 4/mmm 4/m 2/m 2/m

40.02a.01.02 Meta-autunite Ca(UO2)2(PO4)2•2-6(H2O) P 4/nmm 4/m 2/m 2/m

40.02a.01.03 Pseudo-autunite* (H3O)4Ca2(UO2)2(PO4)4•5(H2O)(?) Unk Ortho

40.02a.01.04 Sodium meta-autunite! Na2(UO2)2(PO4)2•6-8(H2O) P 4/nmm 4/m 2/m 2/m

Strunz Class:

08.XX.00 08 - PHOSPHATES, ARSENATES, VANADATES

08.X - Unclassified Strunz PHOSPHATES, ARSENATES, VANADATES

08.XX -Meta-autunite Group

08.XX.00 Arsenobismite? Bi2(AsO4)(OH)3 Unk Ortho

08.XX.00 Coeruleolactite (Ca,Cu)Al6(PO4)4(OH)8•4-5(H2O) P1 1

08.XX.00 Cheralite-(Ce)? (Ce,Ca,Th)(P,Si)O4 P 2₁/n 2/m

08.XX.00 Chernovite-(Ce)* (Ce,Y)(AsO4) I 4₁/amd 4/m 2/m 2/m

08.XX.00 Kerstenite? PbSeO4(?) P nma 2/m 2/m 2/m

08.XX.00 Laubmannite? Fe3Fe6(PO4)4(OH)12 Unk Ortho

08.XX.00 Spodiosite? Ca2(PO4)F Pbcm 2/m 2/m 2/m

08.XX.00 Pseudo-autunite* (H3O)4Ca2(UO2)2(PO4)4•5(H2O)(?) Unk Ortho

08.XX.00 Viseite Ca10Al24(SiO4)6(PO4)7O22F3•72(H2O)(?) I a3d 4/m 3 2/m

08.XX.00 Vanuranylite? (H3O,Ba,Ca,K)1.6(UO2)2V2O8•4(H2O)(?) C 2/c ? 2/m

08.XX.00 Sodium-autunite Na2(UO2)2(PO4)2•8(H2O) P 4/nmm 4/m 2/m 2/m

08.XX.00 Sodium meta-autunite! Na2(UO2)2(PO4)2•6-8(H2O) P 4/nmm 4/m 2/m 2/m

08.XX.00 Slavkovite! Cu13(AsO4)6(AsO3OH)4•23(H2O) P1 1

08.XX.00 IMA2000-020! Fe4[AsO3OH]5[AsO2(OH)2]2•20(H2O) Ortho Ortho

08.XX.00 Lewisite! (Ca,Fe,Na)2(Sb,Ti)2O7 F d3m 4/m 3 2/m

08.XX.00 Kamarizaite! Fe3(AsO4)2(OH)3•3H2O Pccm, Pcc2, Pcmm, Pcm21 Ortho

08.XX.00 Lapeyreite! Cu3O[AsO3(OH)]2•H2O C 2/m 2/m

08.XX.00 IMA2008-063 Pb[Zn0.25,[]0.75]Fe3H(AsO4)2(OH)6 C 2/c 2/m

08.XX.00 IMA2009-002! Cu3(AsO4)2 P 2₁/c 2/m

08.XX.00 IMA2009-005 (Y,Ca,REE)5[(Si,P)O4]3F P 6₃/m 6/m 2/m 2/m

08.XX.00 IMA2009-016 Cu4H(AsO4)2(OH)3•H2O P1 1

Other Pseudo-autunite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

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

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Ask about Pseudo-autunite here :
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Print or Cut-and-Paste your Pseudo-autunite Specimen Label here :

Pseudo-autunite

(H3O)4Ca2(UO2)2(PO4)4•5(H2O) (?)
Dana No: 40.02a.01.03 Strunz No: 08.XX.00
Locality:

Notes: