Zdenekite Mineral Data

General Zdenekite Information

Chemical Formula:

NaPbCu++5(AsO4)4Cl•5(H2O)

Composition:

Molecular Weight = 1,229.13 gm

Sodium 1.87 % Na 2.52 % Na₂O

Copper 25.85 % Cu 32.36 % CuO

Arsenic 24.38 % As 37.40 % As₂O₅

Hydrogen 0.82 % H 7.33 % H₂O

Lead 16.86 % Pb 18.16 % PbO

Chlorine 2.88 % Cl 2.88 % Cl

- % Cl -0.65 % -O=Cl₂

Oxygen 27.34 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

NaPbCu₅(AsO₄)₄Cl•5(H₂O)

Environment:

In a tennantite-bearing horizon near the contact with a lead-bearing horizon in pillars 78, 78b, and 80 in the northern part of the mine.

IMA Status:

Approved IMA 1995

Locality:

The Cap Garonne mine, near Le Pradet, 12 km east of Toulon, Var, France. Link to MinDat.org Location Data.

Name Origin:

For Dr. Johan Zdenek (1935-), mineralogist and Director of Scientific Affairs of the Bureau de Recherches Geologiques et Minieres, France.

Name Pronunciation:

Zdenekite + Pronunciation

Synonym:

IMA1992-037

Zdenekite Image

Images:

Zdenekite

Comments: Blue crystals of zdenekite on matrix.
Location: Cap Garonne Mine, Pradet, Var, Provence-Alpes-CÃ´te d'Azur, France. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Zdenekite Crystallography

Axial Ratios:

a:c = 1:3.91317

Cell Dimensions:

a = 10.066, c = 39.39, Z = 8; V = 3,991.17 Den(Calc)= 4.09

Crystal System:

Tetragonal - Trapezohedral H-M Symbol (4 2 2) Space Group: P 4₁22,P 4₃22

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

By Intensity(I/I_o): 9.83(1), 3.132(0.9), 4.925(0.6),

Physical Properties of Zdenekite

Cleavage:

{001} Perfect

Color:

Blue, Turquoise.

Density:

4.1

Diaphaneity:

Translucent

Fracture:

Irregular - Flat surfaces (not cleavage) fractured in an irregular pattern.

Habit:

Crystalline - Fine - Occurs as well-formed fine sized crystals.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

1.5-2 - Talc-Gypsum

Luminescence:

Non-fluorescent.

Luster:

Vitreous (Glassy)

Streak:

pale blue

Optical Properties of Zdenekite

Dichroism (e):

turquoise blue or turquoise blue.

Dichroism (w):

pale blue or light green.

Gladstone-Dale:

CI meas= -0.011 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.013 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1809,KPDmeas= 0.1805,KC= 0.1786
Ncalc = 1.73

Optical Data:

Uniaxial (-), e=1.71, w=1.77, bire=0.0600.

Calculated Properties of Zdenekite

Electron Density:

Bulk Density (Electron Density)=3.77 gm/cc
note: Specific Gravity of Zdenekite =4.10 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_Zdenekite= 310.74 barns/electron
U=PE_Zdenekite x rElectron Density=1,171.28 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Zdenekite is Not Radioactive

Zdenekite Classification

Dana Class:

42.09.04.03 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.09)where (A)3 (XO4)2 Zq ï¿½ x(H2O)

(42.09.04)Dana Group

42.09.04.01 Sampleite NaCaCu5(PO4)4Cl•5(H2O) pseudo TET 2/m 2/m 2/m

42.09.04.02 Lavendulan NaCaCu5(AsO4)4Cl•5(H2O) Unk Ortho

42.09.04.03 Zdenekite NaPbCu5(AsO4)4Cl•5(H2O) P 4₁22,P 4₃22 4 2 2

42.09.04.04 Mahnertite! (Na,Ca)Cu3(AsO4)2Cl•5(H2O) I 4mmm 4 2 2

42.09.04.05 Lemanskiite! NaCaCu5(AsO4)4Cl•5H2O P 4₁22 or P 4₃22 4 2 2

Strunz Class:

08.DG.05 08 - PHOSPHATES, ARSENATES, VANADATES

08.D - Phosphates, etc

08.DG -With large and medium-sized cations, (OH, etc.):RO4 < 0.5:1

08.DG.05 Lavendulan NaCaCu5(AsO4)4Cl•5(H2O) Unk Ortho

08.DG.05 Shubnikovite Ca2Cu8(AsO4)6Cl(OH)•7(H2O)(?) Unk Ortho

08.DG.05 Sampleite NaCaCu5(PO4)4Cl•5(H2O) pseudo TET 2/m 2/m 2/m

08.DG.05 Zinclavendulan? NaCa(Zn,Cu)5(AsO4)4Cl•4-5(H2O) Unk Ortho

08.DG.05 Lemanskiite! NaCaCu5(AsO4)4Cl•5H2O P 4₁22 or P 4₃22 4 2 2

08.DG.05 Zdenekite NaPbCu5(AsO4)4Cl•5(H2O) P 4₁22,P 4₃22 4 2 2

Other Zdenekite Information

References:

NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.81,1996) OPTIC PROP.(MinRec)

See Also:

Links to other databases for Zdenekite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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

Zdenekite

NaPbCu++5(AsO4)4Cl•5(H2O)
Dana No: 42.09.04.03 Strunz No: 08.DG.05
Locality:

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