Znucalite Mineral Data

General Znucalite Information

Chemical Formula:

CaZn11(UO2)(CO3)3(OH)20•4(H2O)

Composition:

Molecular Weight = 1,621.63 gm

Calcium 2.47 % Ca 3.46 % CaO

Uranium 14.68 % U 16.65 % UO₂

Zinc 44.36 % Zn 55.21 % ZnO

Hydrogen 1.74 % H 15.55 % H₂O

Carbon 2.22 % C 8.14 % CO₂

Oxygen 34.53 % O

______ ______

100.00 % 99.01 % = TOTAL OXIDE

Empirical Formula:

CaZn₁₁(UO₂)(CO₃)₃(OH)₂₀•4(H₂O)

Environment:

Oxidation product of the U dump material at the mine.

IMA Status:

Approved IMA 1990

Locality:

Lill mine, Pribram, central Bohemia, Czech Republic. Link to MinDat.org Location Data.

Name Origin:

Named for the composition (Zn, U, Calcium).

Name Pronunciation:

Znucalite + Pronunciation

Synonym:

IMA1989-033

Znucalite Image

Images:

Znucalite

Comments: Cream-yellow botryoidal znucalite.
Location: St Christoph Mine, BÃ¤renhecke, GlashÃ¼tte, Erzgebirge, Saxony, Germany. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Images:

Znucalite

Comments: Very pale bluish white, porcelaneous crust of znucalite on matrix.
Location: Mine dump near: Pribam, Bohemia, Czech Republic. Scale: Picture size 5 mm.
© Paul M. Schumacher

Znucalite Crystallography

Axial Ratios:

a:b:c =0.5057:1:0.4721

Cell Dimensions:

a = 12.692, b = 25.096, c = 11.85, Z = 4; alpha = 89.08°, beta = 91.79°, gamma = 90.37° V = 3,772.04 Den(Calc)= 2.86

Crystal System:

Triclinic Space Group: P1 or P1

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

By Intensity(I/I_o): 25.2(1), 2.702(0.9), 6.13(0.7),

Physical Properties of Znucalite

Cleavage:

{010} Perfect

Color:

White, Light yellow, Grayish yellow.

Density:

3.01 - 3.1, Average = 3.05

Diaphaneity:

Translucent

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Luminescence:

Fluorescent, Short UV=greenish yellow, Long UV=greenish yellow.

Luster:

Silky

Streak:

white

Optical Properties of Znucalite

Gladstone-Dale:

CI meas= -0.087 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.161 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2104,KPDmeas= 0.1969,KC= 0.1812
Ncalc = 1.52 - 1.56

Optical Data:

Biaxial (-), a=1.563, b=1.621, g=1.621, bire=0.0580, 2V(Calc)=0, 2V(Meas)=50-66.

Calculated Properties of Znucalite

Electron Density:

Bulk Density (Electron Density)=2.89 gm/cc
note: Specific Gravity of Znucalite =3.06 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Znucalite= 374.37 barns/electron
U=PE_Znucalite x r_electron=1,083.29 barns/cc.

Radioactivity:

GRapi = 1,185,087.59 (Gamma Ray American Petroleum Institute Units)
Concentration of Znucalite per GRapi unit = 843.82 (PPB)

Znucalite 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) 25.67 ± 6.42 grams of pure Znucalite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 2566.6 ±641.65 grams of pure Znucalite .

**Estimated Radioactivity from Znucalite** - 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 / 8.55 cm	26,274,268	7.10E-04	1,185,087.59	389.62
100 gm / 3.97 cm	2,627,427	7.10E-05	118,508.76	38.96
10 gm / 1.84 cm	262,743	7.10E-06	11,850.88	3.90
1 gm / 8.55 mm	26,274	7.10E-07	1,185.09	0.39
0.1 gm / 3.97 mm	2,627	7.10E-08	118.51	0.04
0.01 gm / 1.84 mm	263	7.10E-09	11.85	0.00
0.001 gm / 0.86 mm	26	7.10E-10	1.19	0.00

Weight of pure Znucalite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.06 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

Znucalite Classification

Dana Class:

16b.07.14.01 (16b)Carbonates - Hydroxyl or Halogen

(16b.07)Dana Type

(16b.07.14)Dana Group

16b.07.14.01 Znucalite CaZn11(UO2)(CO3)3(OH)20•4(H2O) P1 or P1 Tri

Strunz Class:

05.ED.45 05 - CARBONATES (NITRATES)

05.E - Uranyl Carbonates

05.ED -UO2:CO3 = 1:3

05.ED.45 Znucalite CaZn11(UO2)(CO3)3(OH)20•4(H2O) P1 or P1 Tri

Other Znucalite Information

References:

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

See Also:

Links to other databases for Znucalite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Franklin Minerals(Dunn)
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - Uranium Minerals

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Print or Cut-and-Paste your Znucalite Specimen Label here :

Znucalite

CaZn11(UO2)(CO3)3(OH)20•4(H2O)
Dana No: 16b.07.14.01 Strunz No: 05.ED.45
Locality:

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