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 % H2 O
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(H2 O)
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, Bärenhecke, Glashütte, 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
X Ray Diffraction:
By Intensity(I/Io ): 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:
PEZnucalite = 374.37 barns/electronU=PEZnucalite 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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