Chernikovite Mineral Data

Chernikovite Mineral Data

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General Chernikovite Information

Chemical Formula:

(H3O)2(UO2)2(PO4)2·6(H2O)

Composition:

Molecular Weight = 876.14 gm

Uranium 54.34 % U 61.64 % UO₂

Phosphorus 7.07 % P 16.20 % P₂O₅

Hydrogen 2.07 % H 18.51 % H₂O

Oxygen 36.52 % O

______ ______

100.00 % 96.35 % = TOTAL OXIDE

Empirical Formula:

(H₃O)₂(UO₂)₂(PO₄)₂·6(H₂O)

IMA Status:

Approved IMA 1988

Locality:

Zod, Armenia and North Aksu, Kazakhstan. Link to MinDat.org Location Data.

Name Origin:

Named for A. P. Chernikov (1927-), Institute of Mineralogy, Geochemistry and Rare Elements, Moscow, Russia.

Synonym:

Hydrogen Autunite

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Chernikovite Crystallography

Axial Ratios:

a:c = 1:1.28817

Cell Dimensions:

a = 7.02, c = 9.043, Z = 1; V = 445.64 Den(Calc)= 3.26

Crystal System:

Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: P 4/nmm

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

By Intensity(I/I_o): 9.03(1), 3.8(0.9), 3.27(0.8),2.77(0.7), 3.51(0.7), 2.96(0.6), 2.16(0.5), 5.56(0.5),

Physical Properties of Chernikovite

Cleavage:

[001] Perfect, [100] Distinct

Color:

Light yellow.

Diaphaniety:

Transparent to Translucent

Habit:

Micaceous - Platy texture with "flexible" plates.

Hardness:

2-2.5 - Gypsum-Finger Nail

Luminescence:

Fluorescent, Short UV=intense yellow green.

Luster:

Vitreous (Glassy)

Streak:

yellow white

Optical Properties of Chernikovite

Dichroism (e):

slight.

Dichroism (w):

slight.

Gladstone-Dale:

CI calc= -0.141 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1759,KC= 0.1542

Optical Data:

Uniaxial (-), e=1.568, w=1.579, bire=0.0110.

Calculated Properties of Chernikovite

Electron Density:

r_electron=2.92 gm/cc
note: r_Chernikovite=3.26 gm/cc.

Fermion Index

Fermion Index = 0.00409
Boson Index = 0.99591

Photoelectric:

PE_Chernikovite=1,378.06 barns/electron
U=PE_Chernikovite x r_electron=4,020.04 barns/cc.

Radioactivity:

GRapi = 4,144,441.52 (Gamma Ray American Petroleum Institute Units)

Chernikovite 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) 7.34 ± 1.83 grams of pure Chernikovite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 733.91 ±183.48 grams of pure Chernikovite .

**Estimated Radioactivity from Chernikovite** - 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 / 8.37 cm	97,261,512	2.63E-03	4,144,441.52	1,362.56
100 gm / 3.88 cm	9,726,151	2.63E-04	414,444.15	136.26
10 gm / 1.80 cm	972,615	2.63E-05	41,444.42	13.63
1 gm / 8.37 mm	97,262	2.63E-06	4,144.44	1.36
0.1 gm / 3.88 mm	9,726	2.63E-07	414.44	0.14
0.01 gm / 1.80 mm	973	2.63E-08	41.44	0.01
0.001 gm / 0.84 mm	97	2.63E-09	4.14	0.00

Weight of pure Chernikovite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.26 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

Chernikovite Classification

Dana Class:

40.2a.19.1 (40)Hydrated Phosphates, etc

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

(40.2a.19)Dana Group

40.2a.19.1 Chernikovite (H3O)2(UO2)2(PO4)2·6(H2O) P 4/nmm 4/m 2/m 2/m

Strunz Class:

VII/E.02-170 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 Chernikovite Information

References:

NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.74,p1400,1989) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Chernikovite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - Uranium Minerals 13 -École des Mines de Paris

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Chernikovite

(H3O)2(UO2)2(PO4)2·6(H2O)
Dana No: 40.2a.19.1 Strunz No: VII/E.02-170
Locality:

Notes: