Zincowoodwardite-3R Mineral Data

Zincowoodwardite-3R Mineral Data

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General Zincowoodwardite-3R Information

Chemical Formula:

[Zn1BxAlx(OH)2][(SO4)x/2·n(H2O)], 0.32 < x < 0.50, n = 0.59

Composition:

Molecular Weight = 109.02 gm

Aluminum 8.17 % Al 15.43 % Al₂O₃

Zinc 29.99 % Zn 37.33 % ZnO

Boron 3.27 % B 10.54 % B₂O₃

Hydrogen 2.94 % H 26.27 % H₂O

Sulfur 5.88 % S 14.69 % SO₃

Oxygen 49.75 % O

______ ______

100.00 % 104.26 % = TOTAL OXIDE

Empirical Formula:

Zn_0.5B_0.33Al_0.33(OH)₂(SO₄)_0.2·0.59(H₂O)

Environment:

A member of the hydrotalcite group; polytype 3R

IMA Status:

Approved IMA 1998 (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

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Zincowoodwardite-3R Crystallography

Axial Ratios:

a:c = 1:8.29363

Cell Dimensions:

a = 3.065, c = 25.42, Z = 3; V = 206.81 Den(Calc)= 2.63

Crystal System:

Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m

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

By Intensity(I/I_o): 8.5(1)(003), 2.354(0.4)(.04), 4.248(0.33)(006),2.6(0.05)(012), 2.039(0.03)(018), 1.508(0.02)(113), 1.532(0.02)(110),

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

Physical Properties of Zincowoodwardite-3R

Cleavage:

None

Color:

Pale bluish white, Bluish white.

Density:

2.66

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-3R

Gladstone-Dale:

CI meas= 0.074 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.064 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2143,KPDmeas= 0.2119,KC= 0.2289

Optical Data:

Uniaxial (-), w=1.5636.

Calculated Properties of Zincowoodwardite-3R

Electron Density:

r_electron=2.63 gm/cc
note: r_{Zincowoodwardite-3R}=2.63 gm/cc.

Fermion Index

Fermion Index = 0.01949
Boson Index = 0.98051

Photoelectric:

PE_{Zincowoodwardite-3R}= 15.06 barns/electron
U=PE_{Zincowoodwardite-3R} x r_electron= 39.55 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Zincowoodwardite-3R is Not Radioactive

Zincowoodwardite-3R Classification

Dana Class:

31.2.2.3b (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-3R 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-3R :
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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Print or Cut-and-Paste your Zincowoodwardite-3R Specimen Label here :

Zincowoodwardite-3R

[Zn1BxAlx(OH)2][(SO4)x/2·n(H2O)], 0.32 < x < 0.50, n = 0.59
Dana No: 31.2.2.3b Strunz No: VI/D.08-45**
Locality:

Notes: