Zdenekite Mineral Data

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.

Synonym:

IMA1992-037

Zdenekite Image

Images:

Zdenekite

Comments: Blue crystals of zdenekite on matrix.
Location: Cap Garonne Mine, Pradet, Var, Provence-Alpes-C?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 - TrapezohedralH-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

Diaphaniety:

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

Optical Data:

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

Calculated Properties of Zdenekite

Electron Density:

r_electron=3.77 gm/cc
note: r_Zdenekite=4.10 gm/cc.

Fermion Index

Fermion Index = 0.03738
Boson Index = 0.96262

Photoelectric:

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

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Zdenekite is Not Radioactive

Zdenekite Classification

Dana Class:

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

(42.9)where (A)3 (XO4)2 Zq · x(H2O)

(42.9.4)Dana Group

42.9.4.1 Sampleite NaCaCu5(PO4)4Cl·5(H2O) pseudo TET 2/m 2/m 2/m

42.9.4.2 Lavendulan NaCaCu5(AsO4)4Cl·5(H2O) Unk Ortho

42.9.4.3 Zdenekite NaPbCu5(AsO4)4Cl·5(H2O) P 4₁22,P 4₃22 4 2 2

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

42.9.4.5 Lemanskiite! NaCaCu5(AsO4)4Cl·5(H2O) P 4₁22 or P 4₃22 Tetra

Strunz Class:

VII/D.25-25 VII - Phosphates, Arsenates and Vanadates

VII/D - Water-bearing phosphates with unfamiliar anions, cations of very big and medium size: Al, Mg and Ca, Na, K

VII/D.25 - Lavendulan series

VII/D.25-10 Sampleite NaCaCu5(PO4)4Cl·5(H2O) pseudo TET 2/m 2/m 2/m

VII/D.25-20 Lavendulan NaCaCu5(AsO4)4Cl·5(H2O) Unk Ortho

VII/D.25-22 Zinclavendulan* NaCa(Zn,Cu)5(AsO4)4Cl·4-5(H2O) Unk Ortho

VII/D.25-24 Lemanskiite! NaCaCu5(AsO4)4Cl·5(H2O) P 4₁22 or P 4₃22 Tetra

VII/D.25-25 Zdenekite NaPbCu5(AsO4)4Cl·5(H2O) P 4₁22,P 4₃22 4 2 2

VII/D.25-27 Mahnertite! (Na,Ca)Cu3(AsO4)2Cl·5(H2O) I 4mmm 4 2 2

VII/D.25-30 Shubnikovite Ca2Cu8(AsO4)6Cl(OH)·7(H2O)(?) Unk Ortho

VII/D.25-33 Goldquarryite! (Cu,[])(Cd,Ca)2Al3(PO4)4F2(H2O)10{(H2O,F)}2 P1 1

VII/D.25-35 Andyrobertsite! KCdCu5(AsO4)4[As(OH)2O2]·2(H2O) P 2₁/m 2/m

VII/D.25-36 Calcio-andyrobertsite-1M! KCaCu5(AsO4)4[As(OH)2O2]·2(H2O) P 2₁/m 2/m

VII/D.25-36* Calcio-andyrobertsite-2O! KCaCu5(AsO4)4[As(OH)2O2]·2(H2O) P nma 2/m 2/m 2/m

VII/D.25-38 Esperanzaite! NaCa2Al2(AsO4)2F4(OH)·2(H2O) P 2₁/m 2/m

VII/D.25-40 Englishite K3Na2Ca10Al15(PO4)21(OH)7·26(H2O) A2 or Aa 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 - Crocoite.com Mineral Locations 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas

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Zdenekite

NaPbCu++5(AsO4)4Cl·5(H2O)
Dana No: 42.9.4.3 Strunz No: VII/D.25-25
Locality:

Notes: