Zincowoodwardite-3R Mineral Data

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

Zincowoodwardite-3R Image

Images:

Zincowoodwardite-1T Zincowoodwardite-3R

Comments: Zincowoodwardite-1T and zincowoodwardite-3R spherical aggregates. Holotype specimen for both species.
Location: Kamariza mine, Hilarion Mine, Lavrion, AttikÃ Prefecture, Greece. Scale: Capsule length 3 cm.
© German Type Specimen Catalogue

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 Scalenohedral H-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),

Physical Properties of Zincowoodwardite-3R

Cleavage:

None

Color:

Pale bluish white, Bluish white.

Density:

2.66

Diaphaneity:

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
Ncalc = 1.6 - 1.61

Optical Data:

Uniaxial (-), w=1.5636.

Calculated Properties of Zincowoodwardite-3R

Electron Density:

Bulk Density (Electron Density)=2.63 gm/cc
note: Specific Gravity of Zincowoodwardite-3R =2.63 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

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

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Zincowoodwardite-3R is Not Radioactive

Zincowoodwardite-3R Classification

Dana Class:

31.02.02.03b (31)Hydrated Sulfates Containing Hydroxyl or Halogen

(31.02)where (A+ B++)6 (XO4) Zqï¿½x(H2O)

(31.02.02)Woodwardite Group

31.02.02.01 Woodwardite Cu4Al2(SO4)(OH)12•2-4(H2O) Unk Hex

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

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

31.02.02.03a Zincowoodwardite-1T! [Zn1BxAlx(OH)2][(SO4)x/2•n(H2O)],x=0.33,n.0.96 P 3 3

31.02.02.03b 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:

07.DD.35 07 - SULFATES (SELENATES, TELLURATES)

07.D - Sulfates (selenates, etc.) with additional anions, with H2O

07.DD -With only medium-sized cations; sheets of edge-sharing octahedra

07.DD.35 Carrboydite (Ni,Cu)14Al9(SO4,CO3)6(OH)43•7(H2O) Unk Hex

07.DD.35 Glaucocerinite (Zn,Cu)5Al3(SO4)1.5(OH)16•9(H2O) Unk (HEX-R) Trig

07.DD.35 Honessite Ni6Fe2(SO4)(OH)16•4(H2O) R 3m 3 2/m

07.DD.35 Hydrowoodwardite! Cu1-xAlx(OH)2(SO4)x/2•n(H2O)with0<x<0.67andn>3x/2 R 3m 3 2/m

07.DD.35 Zincowoodwardite! [Zn1-xAlx(OH)2][(SO4)x/2(H2O)n] P 3- or R 3m 3

07.DD.35 Hydrohonessite Ni6Fe2(SO4)(OH)16•7(H2O) Unk Hex

07.DD.35 Motukoreaite Na2Mg38Al24(CO3)13(SO4)8(OH)108•56(H2O) R 3m 3 2/m

07.DD.35 Mountkeithite (Mg,Ni)11(Fe,Cr)3(SO4,CO3)3.5(OH)24•11(H2O) Unk Hex

07.DD.35 Shigaite Mn7Al4(SO4)2(OH)22•8(H2O) R 3 3

07.DD.35 Natroglaucocerinite! (Na,Zn,Cu)10Al6(SO4)3(OH)32•18(H2O)? Unk

07.DD.35 Wermlandite (Ca,Mg)Mg7(Al,Fe)2(SO4)2(OH)18•12(H2O) P 3c1 3 2/m

07.DD.35 Nikischerite! NaFe6Al3(SO4)2(OH)18(H2O)12 R 3 3

07.DD.35 Zincaluminite Zn6Al6(SO4)2(OH)26•5(H2O) Unk Hex

07.DD.35 Woodwardite Cu4Al2(SO4)(OH)12•2-4(H2O) Unk Hex

07.DD.35 Zincowoodwardite-3R! [Zn1BxAlx(OH)2][(SO4)x/2•n(H2O)],0.32<x<0.50,n=0.59 R 3m 3 2/m

07.DD.35 Zincowoodwardite-1T! [Zn1BxAlx(OH)2][(SO4)x/2•n(H2O)],x=0.33,n.0.96 P 3 3

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 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Zincowoodwardite-3R

[Zn1BxAlx(OH)2][(SO4)x/2•n(H2O)], 0.32 < x < 0.50, n = 0.59
Dana No: 31.02.02.03b Strunz No: 07.DD.35
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