Zalesiite Mineral Data

Zalesiite Mineral Data

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General Zalesiite Information

Chemical Formula:

(Ca,Y)Cu6[(AsO4)2(AsO3OH)(OH)6]·3(H2O)

Composition:

Molecular Weight = 1,004.97 gm

Calcium 3.19 % Ca 4.46 % CaO

Yttrium 1.77 % Y 2.25 % Y₂O₃

Copper 37.94 % Cu 47.49 % CuO

Arsenic 22.37 % As 34.31 % As₂O₅

Hydrogen 1.30 % H 11.65 % H₂O

Oxygen 33.43 % O

______ ______

100.00 % 100.16 % = TOTAL OXIDE

Empirical Formula:

Ca_0.8Y_0.2Cu₆(AsO₄)₂(AsO₃OH)(OH)₆·3(H₂O)

Environment:

Oxidation product of chalcopyrite The calcium and arsenate dominant member of the mixite group.

IMA Status:

Approved IMA 1997 (Dana # Added)

Locality:

Zalesi (formerly Valdek) uranium deposit near Javornik, northern Moravia, Czech Republic. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Synonym:

IMA1997-009

Zalesiite Image

Images:

Zalesiite

Comments: Green crusts of z?les?ite on matrix.
Location: Z?les? deposit, Javorn?k, Moravia, Czech Republic. Scale: Picture size 6 mm.
© Thomas Witzke / Abraxas-Verlag

Images:

Zalesiite

Comments: Light blue acicular sprays of zalesiite to 0.75mm.
Location: Gold Hill mine, Tooele Co., Utah, USA. Scale: Picture size 2 mm.
© Tom Loomis / Dakota Matrix

Zalesiite Crystallography

Axial Ratios:

a:c = 1:0.43327

Cell Dimensions:

a = 13.571, c = 5.88, Z = 2; V = 937.85 Den(Calc)= 3.56

Crystal System:

Hexagonal - DipyramidalH-M Symbol (6/m) Space Group: P 6₃/m

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

By Intensity(I/I_o): 11.64(1), 2.9347(0.42), 4.431(0.41),

Crystal Structure:

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Aruga A , Nakai I , Acta Crystallographica, Section C , 41 (1985) p.161-163, Structure of Ca-rich agardite,, (Ca0.40Y0.31Fe0.09Ce0.06La0.04Nd0.01)Cu6.19[(AsO4)2.42(HAsO4)0.49](OH)6.38*3H2O, Locality: Setoda, Hiroshima, Japan

Physical Properties of Zalesiite

Color:

Pale green.

Density:

3.49

Diaphaniety:

Transparent

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Fibrous - Crystals made up of fibers.

Habit:

Powdery - Forms a loose, poorly-coherent pulverulent mass.

Hardness:

2-3 - Gypsum-Calcite

Luster:

Vitreous - Resinous

Streak:

white

Optical Properties of Zalesiite

Gladstone-Dale:

CI meas= -0.101 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.079 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2041,KPDmeas= 0.2082,KC= 0.1891

Optical Data:

Uniaxial (+), w=1.688, e=1.765, bire=0.0770.

Calculated Properties of Zalesiite

Electron Density:

r_electron=3.39 gm/cc
note: r_Zalesiite=3.56 gm/cc.

Fermion Index

Fermion Index = 0.0002
Boson Index = 0.9998

Photoelectric:

PE_Zalesiite= 34.66 barns/electron
U=PE_Zalesiite x r_electron= 117.31 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Zalesiite is Not Radioactive

Zalesiite Classification

Dana Class:

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

(42.5)where (A)2 (XO4) Zq · x(H2O)

(42.5.1)Mixite group (Arsenate Series)

42.5.1.1 Mixite BiCu6(AsO4)3(OH)6·3(H2O) P 6₃/m 6/m

42.5.1.2 Agardite-(Y) (Y,Ca)Cu6(AsO4)3(OH)6·3(H2O) P 6₃/m 6/m

42.5.1.2a Agardite-(La)! (La,Ca)Cu6(AsO4)3(OH)6·3(H2O) P 6₃/m 6/m

42.5.1.2b Agardite-(Nd)! (Pb,Nd,Y,La,Ca)Cu6(AsO4)3(OH)6·3(H2O) 6/m

42.5.1.2c Agardite-(Dy)! (Dy,La,Ca)Cu6(AsO4)3(OH)6·3(H2O) 6/m

42.5.1.2d Agardite-(Ca)! CaCu6(AsO4)3(OH)6·3(H2O) 6/m

42.5.1.2e Agardite-(Ce)! (Ce,Ca)Cu6(AsO4)3(OH)6·3(H2O) P 6₃/m 6/m

42.5.1.3 Goudeyite (Al,Y)Cu6(AsO4)3(OH)6·3(H2O) Unk Hex

42.5.1.4 Zalesiite ! (Ca,Y)Cu6[(AsO4)2(AsO3OH)(OH)6]·3(H2O) P 6₃/m 6/m

42.5.1.6 IMA2003-031a! (Pb,REE,Ca)Cu6(AsO4)3(OH)6·3(H2O) P 6₃/m 6/m

Strunz Class:

VII/D.53-30 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.53 - Mixite - Agardite group

VII/D.53-10 Petersite-(Y) (Y,Ce,Nd,Ca)Cu6(PO4)3(OH)6·3(H2O) P 6₃/m 6/m

VII/D.53-20 Goudeyite (Al,Y)Cu6(AsO4)3(OH)6·3(H2O) Unk Hex

VII/D.53-30 Zalesiite (Ca,Y)Cu6[(AsO4)2(AsO3OH)(OH)6]·3(H2O) P 6₃/m 6/m

VII/D.53-40 Agardite-(Y) (Y,Ca)Cu6(AsO4)3(OH)6·3(H2O) P 6₃/m 6/m

VII/D.53-50 Agardite-(La)! (La,Ca)Cu6(AsO4)3(OH)6·3(H2O) P 6₃/m 6/m

VII/D.53-60 Agardite-(Ce)! (Ce,Ca)Cu6(AsO4)3(OH)6·3(H2O) P 6₃/m 6/m

VII/D.53-70 Agardite-(Nd)! (Pb,Nd,Y,La,Ca)Cu6(AsO4)3(OH)6·3(H2O) 6/m

VII/D.53-80 Agardite-(Dy)! (Dy,La,Ca)Cu6(AsO4)3(OH)6·3(H2O) 6/m

VII/D.53-90 Mixite BiCu6(AsO4)3(OH)6·3(H2O) P 6₃/m 6/m

VII/D.53-95 Juanitaite! (Cu,Ca,Fe)10Bi(AsO4)4(OH)11·2(H2O) P 4₁/nnm 4/m 2/m 2/m

VII/D.53-100 Mrazekite Bi2Cu3(PO4)2O2(OH)2·2(H2O) P 2₁/n 2/m

Other Zalesiite Information

References:

NAME( AmMin, vol 85, p 1564) PHYS. PROP.(AmMin, vol 85, p 1564) OPTIC PROP.(AmMin, vol 85, p 1564)

See Also:

Links to other databases for Zalesiite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Zalesiite

(Ca,Y)Cu6[(AsO4)2(AsO3OH)(OH)6]·3(H2O)
Dana No: 42.5.1.4 Strunz No: VII/D.53-30
Locality:

Notes: