Znucalite Mineral Data

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).

Synonym:

IMA1989-033

Znucalite Image

Images:

Znucalite

Comments: Cream-yellow botryoidal znucalite.
Location: St Christoph Mine, B?renhecke, Glash?tte, 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:

TriclinicSpace 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

Diaphaniety:

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

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:

r_electron=2.89 gm/cc
note: r_Znucalite=3.06 gm/cc.

Fermion Index

Fermion Index = 0.01968
Boson Index = 0.98032

Photoelectric:

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

Radioactivity:

GRapi = 1,185,087.09 (Gamma Ray American Petroleum Institute Units)

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	26,274,264	7.10E-04	1,185,087.09	389.62
100 gm / 3.97 cm	2,627,426	7.10E-05	118,508.71	38.96
10 gm / 1.84 cm	262,743	7.10E-06	11,850.87	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.7.14.1 (16b)Carbonates - Hydroxyl or Halogen

(16b.7)Dana Type

(16b.7.14)Dana Group

16b.7.14.1 Znucalite CaZn11(UO2)(CO3)3(OH)20·4(H2O) P1 or P1 Tri

Strunz Class:

V/F.03-15 V - Nitrates, Carbonates and Borates

V/F - Uranylcarbonates ([UO2]2+ - [CO3]2-)

V/F.03 - Roubaultite - Voglite series

V/F.03-10 Roubaultite Cu2(UO2)3(CO3)2O2(OH)2·4(H2O) P1 1

V/F.03-15 Znucalite CaZn11(UO2)(CO3)3(OH)20·4(H2O) P1 or P1 Tri

V/F.03-20 Voglite Ca2Cu(UO2)(CO3)4·6(H2O) P 2₁ 2

Other Znucalite Information

References:

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

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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.7.14.1 Strunz No: V/F.03-15
Locality:

Notes: