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Hydrowoodwardite

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Formula:
(Cu1-xAlx)(OH)2[SO4]x/2 · nH2O
( x < 0.5, n > 3x/2)
System:
Trigonal
Colour:
blue, greenish-blue, ...
Lustre:
Vitreous
Name:
Named as the higher hydrated analogue of woodwardite.
Slowly and reversibly dehydrates to woodwardite.
The range of composition currently ascribed to hydrowoodwardite may represent more than one species (Mills et al., 2012).

Compare also glaucocerinite.


Classification of Hydrowoodwardite

Approved
Approval Year:
1996
7.DD.35

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
D : With only medium-sized cations; sheets of edge-sharing octahedra

Physical Properties of Hydrowoodwardite

Vitreous
Diaphaneity (Transparency):
Translucent
Colour:
blue, greenish-blue, pale blue
Streak:
pale blue
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
2.33 g/cm3 (Measured)    

Optical Data of Hydrowoodwardite

Type:
Uniaxial (+)
RI values:
nω = 1.549 nε = 1.565
Max Birefringence:
δ = 0.016
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Low

Chemical Properties of Hydrowoodwardite

Formula:
(Cu1-xAlx)(OH)2[SO4]x/2 · nH2O

( x < 0.5, n > 3x/2)
IMA Formula:
(Cu1-xAlx)(SO4)x/2(OH)2 · nH2O (x < 0.5, n > 3x/2)
Elements listed in formula:

Crystallography of Hydrowoodwardite

Crystal System:
Trigonal
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Space Group:
R3m
Cell Parameters:
a = 3.07 Å, c = 31.9 Å
Ratio:
a:c = 1 : 10.391
Unit Cell Volume:
V 260 ų
Z:
3
Comment:
Probable space group R-3m.
X-Ray Powder Diffraction Data:
d-spacingIntensity
10.5 (100)
5.26 (17)
3.50 (6)
2.60 (5b)
2.46 (2b)
2.23 (2b)
1.524 (4b)

Type Occurrence of Hydrowoodwardite

Relationship of Hydrowoodwardite to other Species

7.DD.05FelsőbányaiteAl4(SO4)(OH)10 · 4H2O
7.DD.10LangiteCu4(SO4)(OH)6 · 2H2O
7.DD.10PosnjakiteCu4(SO4)(OH)6 · H2O
7.DD.10WroewolfeiteCu4(SO4)(OH)6 · 2H2O
7.DD.15SpangoliteCu6Al(SO4)(OH)12Cl · 3H2O
7.DD.20KtenasiteZn(Cu,Zn)4(SO4)2(OH)6 · 6H2O
7.DD.25ChristeliteCu2Zn3(SO4)2(OH)6 · 4H2O
7.DD.30CampigliaiteMn2+Cu4(SO4)2(OH)6 · 4H2O
7.DD.30DevillineCaCu4(SO4)2(OH)6 · 3H2O
7.DD.30OrthoserpieriteCa(Cu,Zn)4(SO4)2(OH)6 · 3H2O
7.DD.30SerpieriteCa(Cu,Zn)4(SO4)2(OH)6 · 3H2O
7.DD.30NiedermayriteCdCu4(SO4)2(OH)6 · 4H2O
7.DD.30EdwardsiteCu3Cd2(SO4)2(OH)6·4H2O
7.DD.35Carrboydite[(Ni1-xAlx)(OH)2][SO4]x/2 · nH2O
7.DD.35Glaucocerinite(Zn1-xAlx)(OH)2(SO4)x/2 · nH2O
7.DD.35Honessite(Ni1-xFex3+)(OH)2[SO4]x/2 · nH2O
7.DD.35Hydrohonessite(Ni1-xFex3+)(OH)2[SO4]x/2 · nH2O
7.DD.35MotukoreaiteMg6Al3(OH)18[Na(H2O)6][SO4]2 · 6H2O
7.DD.35Mountkeithite[(Mg1-xFex3+)(OH)2][SO4]x/2 · nH2O
7.DD.35ShigaiteMn6Al3(OH)18[Na(H2O)6][SO4]2 · 6H2O
7.DD.35WermlanditeMg7Al2(OH)18[Ca(H2O)6][SO4]2 · 6H2O
7.DD.35WoodwarditeCu1-xAlx(OH)2[SO4]x/2 · nH2O
7.DD.35ZincaluminiteZn6Al6(SO4)2(OH)16 · 5H2O
7.DD.35ZincowoodwarditeZn1-xAlx(OH)2[SO4]x/2 · nH2O
7.DD.35NatroglaucoceriniteZn6Al3(OH)18[Na(H2O)6](SO4)2•6H2O
7.DD.35NikischeriteFe62+Al3(OH)18[Na(H2O)6][SO4]2 · 6H2O
7.DD.40Lawsonbauerite(Mn2+,Mg)9Zn4(SO4)2(OH)22 · 8H2O
7.DD.40Torreyite(Mg,Mn2+)72Mn22+Zn4(SO4)2(OH)22 · 8H2O
7.DD.45MooreiteMg92Mn2Zn4(SO4)2(OH)26 · 8H2O
7.DD.50NamuwiteZn4(SO4)(OH)6 · 4H2O
7.DD.55BechereriteZn7Cu(OH)13[(SiO(OH)3(SO4)]
7.DD.60Ramsbeckite(Cu,Zn)15(SO4)4(OH)22 · 6H2O
7.DD.65VonbezingiteCa6Cu3(SO4)3(OH)12 · 2H2O
7.DD.70RedgilliteCu6(SO4)(OH)10 · H2O
7.DD.75ChalcoalumiteCuAl4(SO4)(OH)12 · 3H2O
7.DD.75Nickelalumite(Ni,Cu)Al4(SO4,(NO3)2)(OH)12 · 3H2O
7.DD.75KyrgyzstaniteZnAl4(SO4)(OH)12·3H2O
7.DD.80GuarinoiteZn6(SO4)(OH)10 · 5H2O
7.DD.80Schulenbergite(Cu,Zn)7(SO4)2(OH)10 · 3H2O
7.DD.80ThérèsemagnaniteNaCo4(SO4)(OH)6Cl·6H2O
7.DD.80UM1992-30-SO:CCuHZn(Zn,Cu)7(SO4,CO3)2(OH)10 · 3H2O
7.DD.85MontetrisaiteCu6(SO4)(OH)10 · 2H2O

Other Names for Hydrowoodwardite

Name in Other Languages:

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Hydrowoodwardite

Reference List:
Witzke, T. (1999), Hydrowoodwardite, a new mineral of the hydrotalcite group from Königswalde near Annaberg, Saxony/Germany and other localities.- Neues Jahrbuch für Mineralogie, Monatshefte (1999): 75-86.

Mills, S.J., Christy, A.G., Genin, J.-M.R., Kameda, T., Colombo, F. (2012): Nomenclature of the hydrotalcite supergroup: natural layered double hydroxides. Mineralogical Magazine, 76, 1289-1336.

Internet Links for Hydrowoodwardite

mindat.org URL:
https://www.mindat.org/min-7004.html
Please feel free to link to this page.

Localities for Hydrowoodwardite

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Bolivia
 
  • Oruro Department
    • Dalence Province
      • Huanuni
Gunnar Farber specimens (originally with a MIKON "nikischerite" label).
France
 
  • Occitanie
    • Aude
      • Carcassonne
        • Mas-Cabardès
          • Salsigne
EDS by Vincent Bourgoin - Jean Wyart association
Germany
 
  • North Rhine-Westphalia
    • Siegerland
      • Müsen
Der Aufschluss 2000(2), 71-123
  • Saxony
    • Erzgebirge
      • Annaberg District
        • Königswalde
T. Witzke (1999) Neues Jahrbuch für Mineralogie, Monatshefte, 75-86
      • Glashütte
        • Bärenhecke
T. Witzke (1999) Neues Jahrbuch für Mineralogie, Monatshefte, 75-86
      • Marienberg District
        • Lauta
Hajek, W. (2010): Kristallwelten Marienberg. Weise Verlag, München.
        • Wolkenstein
T. Witzke (1999) Neues Jahrbuch für Mineralogie, Monatshefte, 75-86
      • Schwarzenberg District
        • Grünhain-Beierfeld
          • Beierfeld
T. Witzke (1999) Neues Jahrbuch für Mineralogie, Monatshefte, 75-86
Greece
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
      • Lavrion District Mines
        • Agios Konstantinos [St Constantine] (Kamariza)
          • Kamariza Mines (Kamareza Mines)
            • Hilarion area
No reference listed
        • Sounion Area
          • Agia Varvara Mines (St Barbara Mines)
No reference listed
Italy
 
  • Aosta Valley
    • Saint-Marcel
Tumiati, S., Godard, G., Masciocchi, N., Martin, S., Monticelli, D. (2008): Environmental factors controlling the precipitation of Cu-bearing hydrotalcite-like compounds from mine waters. The case of the "Eve verda" spring (Aosta Valley, Italy). European Journal of Mineralogy, 20, 73-94.
Tumiati, S., Godard, G., Masciocchi, N., Martin, S., Monticelli, D. (2008): Environmental factors controlling the precipitation of Cu-bearing hydrotalcite-like compounds from mine waters. The case of the "Eve verda" spring (Aosta Valley, Italy). European Journal of Mineralogy, 20, 73-94.
  • Liguria
    • Genova Province
      • Sestri Levante
Carbone, C. (2008). Crystallochemical and minerogenetic study of oxide and oxy-hydroxides related to AMD (acid mine drainage) processes in Libiola mine (Sestri Levante). Plinius No. 34
  • Trentino-Alto Adige (Trentino-Südtirol)
    • Trento Province
      • Canal San Bovo
        • Vanoi Valley
          • Pralongo
Conedera M., Bursi Gandolfi N., Ferretti P., Gualtieri A., Rocchetti I. (2016): Miniera di Pralongo. Una mineralizzazione cuprifera presso Canal San Bovo (Valle del Vanoi, Trento): Riv. Mineral. Ital., 50, 2 (2-2016), 90-119.
      • Valsugana
        • Roncegno
-Bortolozzi G., Blass G., Boscardin M., Rocchetti I. and Ferretti P. (2013): La Miniera di Cinquevalli (Valsugana, Trentino-Alto Adige): aggiornamento sulle specie accertate negli ultimi anni. Studi Trent. Sci. Nat., 93, pagg. 149-165.
Japan
 
  • Honshu Island
    • Chugoku region
      • Shimane Prefecture
        • Ohchi-gun
Ohe Rikosha specimens; and specimens on sale at Tokyo (TIMA) show, 2009.
Mineral and/or Locality  
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