General Zincowoodwardite-3R Information
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Chemical Formula: |
[Zn1BxAlx(OH)2][(SO4)x/2·n(H2O)], 0.32 < x < 0.50, n = 0.59 |
Composition: |
Molecular Weight = 109.02 gm |
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Aluminum 8.17 % Al 15.43 % Al2O3 |
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Zinc 29.99 % Zn 37.33 % ZnO |
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Boron 3.27 % B 10.54 % B2O3 |
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Hydrogen 2.94 % H 26.27 % H2O |
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Sulfur 5.88 % S 14.69 % SO3 |
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Oxygen 49.75 % O |
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______ ______ |
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100.00 % 104.26 % = TOTAL OXIDE |
Empirical Formula: |
Zn0.5B0.33Al0.33(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
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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 |
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), |
Crystal Structure:
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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
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Physical Properties of Zincowoodwardite-3R
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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 |
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Optical Properties of Zincowoodwardite-3R
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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. |
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Calculated Properties of Zincowoodwardite-3R
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Electron Density: |
relectron=2.63 gm/cc note: rZincowoodwardite-3R =2.63 gm/cc. |
Fermion Index |
Fermion Index = 0.01949 Boson Index = 0.98051 |
Photoelectric: |
PEZincowoodwardite-3R = 15.06 barns/electron U=PEZincowoodwardite-3R x relectron= 39.55 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Zincowoodwardite-3R is Not Radioactive |
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Zincowoodwardite-3R Classification
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Dana Class: |
31.2.2.3b (31)Hydrated Sulfates Containing Hydroxyl or Halogen |
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(31.2)where (A+ B++)6 (XO4) Zq·x(H2O) |
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(31.2.2)Dana Group |
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31.2.2.1 Woodwardite Cu4Al2(SO4)(OH)12·2-4(H2O) Unk Hex |
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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 |
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31.2.2.3 Zincowoodwardite! [Zn1-xAlx(OH)2][(SO4)x/2(H2O)n] P 3- or R 3m 3 |
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31.2.2.3a Zincowoodwardite-1T! [Zn1BxAlx(OH)2][(SO4)x/2·n(H2O)],x=0.33,n.0.96 P 3 3 |
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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 |
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VI/D - Water-bearing sulfates with unfamiliar anions. cations of medium size |
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VI/D.08 - Spangolite - Glaucocerinite series |
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VI/D.08-05 Bechererite! (Zn,Cu)6Zn2(OH)13[(S,Si)(O,OH)4]2 P 3 3 |
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VI/D.08-10 Spangolite Cu6Al(SO4)(OH)12Cl·3(H2O) P 31c 3m |
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VI/D.08-20 Cyanotrichite Cu4Al2(SO4)(OH)12·2(H2O) Unk Ortho |
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VI/D.08-30 Carbonate-cyanotrichite Cu4Al2(CO3,SO4)(OH)12·2(H2O) Unk Ortho |
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VI/D.08-35 Camerolaite Cu4Al2[HSbO4,SO4](OH)10(CO3)·2(H2O) P 21 ? 2 |
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VI/D.08-40 Woodwardite Cu4Al2(SO4)(OH)12·2-4(H2O) Unk Hex |
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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 |
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VI/D.08-45 Zincowoodwardite! [Zn1-xAlx(OH)2][(SO4)x/2(H2O)n] P 3- or R 3m 3 |
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VI/D.08-45* Zincowoodwardite-1T! [Zn1BxAlx(OH)2][(SO4)x/2·n(H2O)],x=0.33,n.0.96 P 3 3 |
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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 |
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VI/D.08-50 Chalcoalumite CuAl4(SO4)(OH)12·3(H2O) P 21 2 |
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VI/D.08-60 Nickelalumite (Ni,Cu)Al4[(SO4),(NO3)2](OH)12·3(H2O) P 21 2 |
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VI/D.08-70 Mbobomkulite (Ni,Cu)Al4(NO3,SO4)2(OH)12·3(H2O) P 21 2 |
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VI/D.08-80 Hydrombobomkulite (Ni,Cu)Al4(NO3,SO4)2(OH)12·14(H2O) Unk Mono |
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VI/D.08-90 Carrboydite (Ni,Cu)14Al9(SO4,CO3)6(OH)43·7(H2O) Unk Hex |
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VI/D.08-100 Zincaluminite Zn6Al6(SO4)2(OH)26·5(H2O) Unk Hex |
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VI/D.08-110 Glaucocerinite (Zn,Cu)5Al3(SO4)1.5(OH)16·9(H2O) Unk (HEX-R) Trig |
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Other Zincowoodwardite-3R Information
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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 :
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Zincowoodwardite-3R
[Zn1BxAlx(OH)2][(SO4)x/2·n(H2O)], 0.32 < x < 0.50, n = 0.59
Dana No: 31.2.2.3b Strunz No: VI/D.08-45**
Locality:
Notes:
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