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 % Al2 O3
Zinc 29.99 % Zn 37.33 % ZnO
Boron 3.27 % B 10.54 % B2 O3
Hydrogen 2.94 % H 26.27 % H2 O
Sulfur 5.88 % S 14.69 % SO3
Oxygen 49.75 % O
______ ______
100.00 % 104.26 % = TOTAL OXIDE
Empirical Formula:
Zn0.5 B0.33 Al0.33 (OH)2 (SO4 )0.2 •0.59(H2 O)
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-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 3 m
X Ray Diffraction:
By Intensity(I/Io ): 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:
PEZincowoodwardite-3R = 15.06 barns/electronU=PEZincowoodwardite-3R x r Electron 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) Zq�x(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 3 m 3 2/m
31.02.02.03 Zincowoodwardite ! [Zn1-xAlx(OH)2][(SO4)x/2(H2O)n] P 3- or R 3 m 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 3 m 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 3 m 3 2/m
07.DD.35 Hydrowoodwardite ! Cu1-xAlx(OH)2(SO4)x/2•n(H2O)with0<x<0.67andn>3x/2 R 3 m 3 2/m
07.DD.35 Zincowoodwardite ! [Zn1-xAlx(OH)2][(SO4)x/2(H2O)n] P 3- or R 3 m 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 3 m 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 3 c1 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 3 m 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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