Hydrowoodwardite Mineral Data

Hydrowoodwardite Mineral Data

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General Hydrowoodwardite Information

Chemical Formula:

Cu1-xAlx(OH)2(SO4)x/2·n(H2O) with 0 < x < 0.67 and n > 3x/2

Composition:

Molecular Weight = 116.81 gm

Aluminum 11.55 % Al 21.82 % Al₂O₃

Copper 27.20 % Cu 30.63 % Cu₂O

Hydrogen 3.02 % H 26.99 % H₂O

Sulfur 6.86 % S 17.14 % SO₃

Oxygen 51.37 % O

______ ______

100.00 % 96.58 % = TOTAL OXIDE

Empirical Formula:

Cu_0.5Al_0.5(OH)₂(SO₄)_0.25·0.75(H₂O)

Environment:

Member of the Hydrotalcite group. The copper dominant analog of carrboydite and glaucocerinite.

IMA Status:

Approved IMA 1996 (Dana # Added)

Locality:

St. Briccius Cu, Ag, Sn mine, Königswalde, near Annaberg, Saxony, Germany. Link to MinDat.org Location Data.

Name Origin:

Named as the higher hydrated analogue of woodwardite.

Synonym:

IMA1996-038

Hydrowoodwardite Image

Images:

Hydrowoodwardite

Comments: Massive blue to greenish-blue hydrowoodwardite.
Location: St Christoph Mine, B?renhecke, Glash?tte, Erzgebirge, Saxony, Germany. Scale: Specimen size 3.4 cm.
© Thomas Witzke / Abraxas-Verlag

Hydrowoodwardite Crystallography

Axial Ratios:

a:c = 1:10.39087

Cell Dimensions:

a = 3.07, c = 31.9, Z = 3; V = 260.37 Den(Calc)= 2.23

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): 10.5(1), 5.26(0.17), 3.5(0.06),

Physical Properties of Hydrowoodwardite

Color:

Blue, Pale blue.

Density:

2.33

Diaphaniety:

Translucent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Botryoidal - "Grape-like" rounded forms (e.g.. malachite).

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Luster:

Vitreous (Glassy)

Streak:

pale blue

Optical Properties of Hydrowoodwardite

Gladstone-Dale:

CI meas= 0 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.045 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2498,KPDmeas= 0.2391,KC= 0.2389

Optical Data:

Uniaxial (+), w=1.549, e=1.565, bire=0.0160.

Calculated Properties of Hydrowoodwardite

Electron Density:

r_electron=2.33 gm/cc
note: r_{Hydrowoodwardite}=2.33 gm/cc.

Fermion Index

Fermion Index = 0.00076
Boson Index = 0.99924

Photoelectric:

PE_{Hydrowoodwardite}= 12.28 barns/electron
U=PE_{Hydrowoodwardite} x r_electron= 28.66 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Hydrowoodwardite is Not Radioactive

Hydrowoodwardite Classification

Dana Class:

31.2.2.2 (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.08-42 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 Hydrowoodwardite Information

References:

NAME( CanMin, 8/99) PHYS. PROP.(MinRec, V 31, No 2) OPTIC PROP.(MinRec, V 31, No. 2)

See Also:

Links to other databases for Hydrowoodwardite :
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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Hydrowoodwardite

Cu1-xAlx(OH)2(SO4)x/2·n(H2O) with 0 < x < 0.67 and n > 3x/2
Dana No: 31.2.2.2 Strunz No: VI/D.08-42
Locality:

Notes: