Pseudo-autunite Mineral Data

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

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:

r_electron=3.03 gm/cc
note: r_{Pseudo-autunite}=3.28 gm/cc.

Fermion Index

Fermion Index = 0.00322
Boson Index = 0.99678

Photoelectric:

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

Radioactivity:

GRapi = 3,210,037.49 (Gamma Ray American Petroleum Institute Units)

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 Bequerols (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	73,065,938	1.97E-03	3,210,037.49	1,055.35
100 gm / 3.88 cm	7,306,594	1.97E-04	321,003.75	105.54
10 gm / 1.80 cm	730,659	1.97E-05	32,100.37	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:

40.2a.1.3 (40)Hydrated Phosphates, etc

(40.2a)where A++ (B++)2 (XO4) · x(H2O), containing (UO2)++

(40.2a.1)Dana Group

40.2a.1.1 Autunite Ca(UO2)2(PO4)2·10-12(H2O) I 4/mmm 4/m 2/m 2/m

40.2a.1.2 Meta-autunite Ca(UO2)2(PO4)2·2-6(H2O) P 4/nmm 4/m 2/m 2/m

40.2a.1.3 Pseudo-autunite * (H3O)4Ca2(UO2)2(PO4)4·5(H2O)(?) Unk Ortho

40.2a.1.4 Sodium meta-autunite! Na2(UO2)2(PO4)2·6-8(H2O) P 4/nmm 4/m 2/m 2/m

Strunz Class:

VII/E.02-180 VII - Phosphates, Arsenates and Vanadates

VII/E - Uranylphosphates and uranylvanadates with [UO2]2+ - [PO4 | AsO4]3- and [UO2]2+ - [V2O8]6-

VII/E.02 - Meta-autunite group

VII/E.02-10 Metanovacekite Mg(UO2)2(AsO4)2·4-8(H2O) P 4/n 4/m

VII/E.02-20 Bassetite Fe(UO2)2(PO4)2·8(H2O) P 2₁/m 2/m

VII/E.02-30 Metakahlerite Fe(UO2)2(AsO4)2·8(H2O) P 4/mmm 4/m 2/m 2/m

VII/E.02-40 Lehnerite Mn[UO2/PO4]2·8(H2O) P 2₁/n 2/m

VII/E.02-50 Metakirchheimerite Co(UO2)2(AsO4)2·8(H2O) P 4/mmm 4/m 2/m 2/m

VII/E.02-60 Metatorbernite Cu(UO2)2(PO4)2·8(H2O) P 4/n 4/m

VII/E.02-70 Metazeunerite Cu(UO2)2(AsO4)2·8(H2O) P 4/n 4/m

VII/E.02-80 Metalodevite Zn(UO2)2(AsO4)2·10(H2O) P 4₁/m 4/m

VII/E.02-90 Meta-autunite Ca(UO2)2(PO4)2·2-6(H2O) P 4/nmm 4/m 2/m 2/m

VII/E.02-95 Sodium meta-autunite! Na2(UO2)2(PO4)2·6-8(H2O) P 4/nmm 4/m 2/m 2/m

VII/E.02-100 Meta-uranospinite Ca(UO2)2(AsO4)2·8(H2O) P 4/nmm 4/m 2/m 2/m

VII/E.02-110 Meta-uranocircite Ba(UO2)2(PO4)2·6-8(H2O) P 2₁ 2

VII/E.02-120 Metaheinrichite Ba(UO2)2(AsO4)2·8(H2O) P 4₁/? 4/m

VII/E.02-130 Sodium-uranospinite (Na2,Ca)(UO2)2(AsO4)2·5(H2O) P 4/nmm 4/m 2/m 2/m

VII/E.02-140 Meta-ankoleite K2(UO2)2(PO4)2·6(H2O) P 4/nmm 4/m 2/m 2/m

VII/E.02-150 Abernathyite K(UO2)(AsO4)·4(H2O) P 4/ncc 4/m 2/m 2/m

VII/E.02-160 Uramphite (NH4)(UO2)(PO4)·3(H2O) P 4/nmm 4/m 2/m 2/m

VII/E.02-170 Chernikovite (H3O)2(UO2)2(PO4)2·6(H2O) P 4/nmm 4/m 2/m 2/m

VII/E.02-180 Pseudo-autunite (H3O)4Ca2(UO2)2(PO4)4·5(H2O)(?) Unk Ortho

VII/E.02-190 Ulrichite CaCu(UO2)(PO4)2·4(H2O) C 2/m 2/m

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 -Google Images 5 -Google Scholar 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas

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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: 40.2a.1.3 Strunz No: VII/E.02-180
Locality:

Notes: