Mineralogy Database

Znucalite Mineral Data

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General Znucalite Information

Help on Chemical  Formula: Chemical Formula: CaZn11(UO2)(CO3)3(OH)20•4(H2O)
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: CaZn11(UO2)(CO3)3(OH)20•4(H2O)
Help on Environment: Environment: Oxidation product of the U dump material at the mine.
Help on IMA Status: IMA Status: Approved IMA 1990
Help on Locality: Locality: Lill mine, Pribram, central Bohemia, Czech Republic. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the composition (Zn, U, Calcium).
Help on Name Pronunciation: Name Pronunciation: Znucalite + Pronunciation Say ZNUCALITE
Help on Synonym: Synonym: IMA1989-033
 

Znucalite Image

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  Znucalite

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

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  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

Help on Axial Ratios: Axial Ratios: a:b:c =0.5057:1:0.4721
Help on Cell Dimensions: 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
Help on Crystal System: Crystal System: Triclinic Space Group: P1 or P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 25.2(1), 2.702(0.9), 6.13(0.7),
 

Physical Properties of Znucalite

Help on Cleavage: Cleavage: {010} Perfect
Help on Color: Color: White, Light yellow, Grayish yellow.
Help on Density: Density: 3.01 - 3.1, Average = 3.05
Help on Diaphaneity: Diaphaneity: Translucent
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Luminescence: Luminescence: Fluorescent, Short UV=greenish yellow, Long UV=greenish yellow.
Help on Luster: Luster: Silky
Help on Streak: Streak: white
 

Optical Properties of Znucalite

Help on Gladstone-Dale: 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
Help on Optical Data: 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

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.89 gm/cc
note: Specific Gravity of Znucalite =3.06 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEZnucalite = 374.37 barns/electron
U=PEZnucalite x relectron=1,083.29 barns/cc.
Help on Radioactivity: 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

Help on  Dana Class: 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
Help on  Strunz Class: 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

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: 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:

 

Notes:

 

 
   
 


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