Zincowoodwardite Mineral Data

Zincowoodwardite Mineral Data

General Zincowoodwardite Information

Chemical Formula:

[Zn1-xAlx(OH)2][(SO4)x/2(H2O)n]

Composition:

Molecular Weight = 103.10 gm

Aluminum 9.94 % Al 18.79 % Al₂O₃

Zinc 29.81 % Zn 37.10 % ZnO

Hydrogen 3.13 % H 27.96 % H₂O

Sulfur 5.60 % S 13.98 % SO₃

Oxygen 51.52 % O

______ ______

100.00 % 97.83 % = TOTAL OXIDE

Empirical Formula:

Zn_0.47Al_0.38(OH)₂(SO₄)_0.18(H₂O)_0.6

Environment:

Composed of intergrown 1T and 3R polytypes.

IMA Status:

Approved IMA 1995 (Dana # Added)

Locality:

Laurion (Lavrion,Laurium), Greece. Link to MinDat.org Location Data.

Name Origin:

Named as the Zn analog of woodwardite.

Synonym:

IMA1998-026

Zincowoodwardite Image

Images:

Click Here for Larger Zincowoodwardite Image

Zincowoodwardite Zaccagnaite

Comments: White to pale bluish zaccagnaite intimately intergrown with zincowoodwardite.
Location: Hilarion Mine, Agios Konstantinos, Lavrion District, Attik? Prefecture, Greece. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Images:

Zincowoodwardite

Comments: Botryoidal zincowoodwardite. The bluish-green color is due to a copper content.
Location: Christiana Mine, Agios Konstantinos, Lavrion District, Attik? Prefecture, Greece. Scale: Picture size 10 mm.
© Thomas Witzke / Abraxas-Verlag

Zincowoodwardite Crystallography

Axial Ratios:

a:c = 1:2.91463

Cell Dimensions:

a = 3.0364, c = 8.85, Z = 1; V = 70.66 Den(Calc)= 2.42

Crystal System:

Trigonal - RhombohedralH-M Symbol ( 3) Space Group: P 3- or R 3m

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

By Intensity(I/I_o): 11.12(1), 5.549(0.24), 3.704(0.15),

Crystal Structure:

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drag2 - RMB Resize/Rotate
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Witzke T , Raade G , Neues Jahrbuch fur Mineralogie, Monatshefte , 2000 (2000) p.455-465, Zincowoodwardite, [Zn1-x Alx(OH)2][(SO4)x/2(H2O)n], a new mineral of the hydrotalcite group, Locality: Hilarion mine, Kamariza, near Laurion, Greece, Note: polytype Zincowoodwardite-1T

Physical Properties of Zincowoodwardite

Cleavage:

None

Color:

Pale blue, Bluish white.

Density:

2.66 - 2.71, Average = 2.68

Diaphaniety:

Translucent

Fracture:

Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite).

Habit:

Pseudo Hexagonal - Crystals show a hexagonal outline.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

1 - Talc

Luster:

Waxy

Streak:

pale bluish white

Optical Properties of Zincowoodwardite

Gladstone-Dale:

CI meas= 0.066 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.036 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2252,KPDmeas= 0.203,KC= 0.2173

Optical Data:

Uniaxial (?), b=1.532-1.558.

Calculated Properties of Zincowoodwardite

Electron Density:

r_electron=2.43 gm/cc
note: r_{Zincowoodwardite}=2.42 gm/cc.

Fermion Index

Fermion Index = 0.01289
Boson Index = 0.98711

Photoelectric:

PE_{Zincowoodwardite}= 14.95 barns/electron
U=PE_{Zincowoodwardite} x r_electron= 36.27 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Zincowoodwardite is Not Radioactive

Zincowoodwardite Classification

Dana Class:

31.2.2.3 (31)Hydrated Sulfates Containing Hydroxyl or Halogen

(31.2)where (A+ B++)6 (XO4) Zq·x(H2O)

(31.2.2)Dana Group

31.2.2.1 Woodwardite Cu4Al2(SO4)(OH)12·2-4(H2O) Unk Hex

31.2.2.2 Hydrowoodwardite! Cu1-xAlx(OH)2(SO4)x/2·n(H2O)with0<x<0.67andn>3x/2 R 3m 3 2/m

31.2.2.3 Zincowoodwardite ! [Zn1-xAlx(OH)2][(SO4)x/2(H2O)n] P 3- or R 3m 3

31.2.2.3a Zincowoodwardite-1T! [Zn1BxAlx(OH)2][(SO4)x/2·n(H2O)],x=0.33,n.0.96 P 3 3

31.2.2.3b Zincowoodwardite-3R! [Zn1BxAlx(OH)2][(SO4)x/2·n(H2O)],0.32<x<0.50,n=0.59 R 3m 3 2/m

Strunz Class:

VI/D.08-45 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/D - Water-bearing sulfates with unfamiliar anions. cations of medium size

VI/D.08 - Spangolite - Glaucocerinite series

VI/D.08-05 Bechererite! (Zn,Cu)6Zn2(OH)13[(S,Si)(O,OH)4]2 P 3 3

VI/D.08-10 Spangolite Cu6Al(SO4)(OH)12Cl·3(H2O) P 3₁c 3m

VI/D.08-20 Cyanotrichite Cu4Al2(SO4)(OH)12·2(H2O) Unk Ortho

VI/D.08-30 Carbonate-cyanotrichite Cu4Al2(CO3,SO4)(OH)12·2(H2O) Unk Ortho

VI/D.08-35 Camerolaite Cu4Al2[HSbO4,SO4](OH)10(CO3)·2(H2O) P 2₁ ? 2

VI/D.08-40 Woodwardite Cu4Al2(SO4)(OH)12·2-4(H2O) Unk Hex

VI/D.08-42 Hydrowoodwardite! Cu1-xAlx(OH)2(SO4)x/2·n(H2O)with0<x<0.67andn>3x/2 R 3m 3 2/m

VI/D.08-45 Zincowoodwardite [Zn1-xAlx(OH)2][(SO4)x/2(H2O)n] P 3- or R 3m 3

VI/D.08-45* Zincowoodwardite-1T! [Zn1BxAlx(OH)2][(SO4)x/2·n(H2O)],x=0.33,n.0.96 P 3 3

VI/D.08-45** Zincowoodwardite-3R! [Zn1BxAlx(OH)2][(SO4)x/2·n(H2O)],0.32<x<0.50,n=0.59 R 3m 3 2/m

VI/D.08-50 Chalcoalumite CuAl4(SO4)(OH)12·3(H2O) P 2₁ 2

VI/D.08-60 Nickelalumite (Ni,Cu)Al4[(SO4),(NO3)2](OH)12·3(H2O) P 2₁ 2

VI/D.08-70 Mbobomkulite (Ni,Cu)Al4(NO3,SO4)2(OH)12·3(H2O) P 2₁ 2

VI/D.08-80 Hydrombobomkulite (Ni,Cu)Al4(NO3,SO4)2(OH)12·14(H2O) Unk Mono

VI/D.08-90 Carrboydite (Ni,Cu)14Al9(SO4,CO3)6(OH)43·7(H2O) Unk Hex

VI/D.08-100 Zincaluminite Zn6Al6(SO4)2(OH)26·5(H2O) Unk Hex

VI/D.08-110 Glaucocerinite (Zn,Cu)5Al3(SO4)1.5(OH)16·9(H2O) Unk (HEX-R) Trig

Other Zincowoodwardite Information

References:

NAME( AmMin, vol 86, p 769) PHYS. PROP.(AmMin, Vol 86, p 769) OPTIC PROP.(AmMin, Vol 86, p 769)

See Also:

Links to other databases for Zincowoodwardite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas

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

Zincowoodwardite

[Zn1-xAlx(OH)2][(SO4)x/2(H2O)n]
Dana No: 31.2.2.3 Strunz No: VI/D.08-45
Locality:

Notes: