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Wülfingite

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About WülfingiteHide

Ernst A. Wülfing
Formula:
Zn(OH)2
Colour:
Colourless, white
Lustre:
Waxy
Hardness:
3
Specific Gravity:
3.05
Crystal System:
Orthorhombic
Name:
Named by K. Schmetzer, G. Schnorrer-Köhler, and O. Medenbach in honor of Ernst Anton Wülfing (27 November 1860, Elberfeld, Germany – 17 December 1930, Bad Wörishofen, Germany), mineralogist and petrographer, known for his research on the optical properties of minerals and meteorites.

Wülfing was a professor at several institutions including the University of Tübingen, the agricultural academy at Hohenheim, Technische Hochschule, the University of Kiel, and the University of Heidelberg.
Polymorph of:
One of the most simple Zn minerals. In terms of chemistry alone it is the Zn analogue of spertiniite (both are orthorhombic but structurally are different).


Classification of WülfingiteHide

Approved
Approval Year:
1983
First Published:
1985
4.FA.10

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
A : Hydroxides with OH, without H2O; corner-sharing tetrahedra
6.2.10.1

6 : HYDROXIDES AND OXIDES CONTAINING HYDROXYL
2 : X(OH)2
7.5.4

7 : Oxides and Hydroxides
5 : Oxides of Zn, Cd and Hg

Physical Properties of WülfingiteHide

Transparency:
Transparent, Translucent
Colour:
Colourless, white
Streak:
White
Hardness:
Fracture:
Conchoidal
Density:
3.05(2) g/cm3 (Measured)    3.06 g/cm3 (Calculated)

Optical Data of WülfingiteHide

Type:
Biaxial (-)
RI values:
nα = 1.572 nβ = 1.578 nγ = 1.580
2V:
Measured: 62.8° , Calculated: 60°
Max Birefringence:
δ = 0.008
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
r < v strong

Chemical Properties of WülfingiteHide

Formula:
Zn(OH)2

Crystallography of WülfingiteHide

Crystal System:
Orthorhombic
Class (H-M):
2 2 2 - Disphenoidal
Space Group:
P21 21 21
Cell Parameters:
a = 8.490 Å, b = 5.162 Å, c = 4.917 Å
Ratio:
a:b:c = 1.645 : 1 : 0.953
Unit Cell V:
215.49 ų (Calculated from Unit Cell)
Z:
4

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.407 (100)
3.280 (100)
4.250 (80)
3.212 (80)
2.727 (80)
2.284 (80)
2.215 (80)

Type Occurrence of WülfingiteHide

General Appearance of Type Material:
crystals, to 200 µm very rare, in starlike clusters; as fine-grained incrustations
Place of Conservation of Type Material:
Göttingen University, Göttingen, Germany; Heidelberg University, Heidelberg, Germany
Geological Setting of Type Material:
weathering product in Zn-bearing slag
Associated Minerals at Type Locality:

Synonyms of WülfingiteHide

Other Language Names for WülfingiteHide

Common AssociatesHide

Related Minerals - Nickel-Strunz GroupingHide

4.FA.05aBehoiteBe(OH)2Orth. 2 2 2 : P21 21 21
4.FA.05bClinobehoiteBe(OH)2Mon. 2 : P21
4.FA.10AshoveriteZn(OH)2Tet.
4.FA.10SweetiteZn(OH)2Tet.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

7.5.1ZinciteZnOHex. 6mm : P63mc
7.5.2SweetiteZn(OH)2Tet.
7.5.3AshoveriteZn(OH)2Tet.
7.5.5GahniteZnAl2O4Iso. m3m (4/m 3 2/m) : Fd3m
7.5.6HetaeroliteZnMn2O4Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
7.5.7HydrohetaeroliteZnMn2O4 · H2OTet. 4/mmm (4/m 2/m 2/m) : I41/amd
7.5.8Chalcophanite(Zn,Fe,Mn)Mn3O7 · 3H2OTrig. 3 : R3
7.5.9WoodruffiteZn2+x/2(Mn4+1-xMn3+x)O2·yH2OMon. 2/m : B2/m
7.5.10FrankliniteZn2+Fe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
7.5.11MonteponiteCdOIso. m3m (4/m 3 2/m) : Fm3m
7.5.12MontroyditeHgOOrth. mmm (2/m 2/m 2/m) : Pmmn

Other InformationHide

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 WülfingiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Schmetzer, K., Schnorrer-Köhler, G., Medenbach, O. (1985) Wülfingite, ε-Zn(OH)2, and simonkolleite, Zn5(OH)8Cl2.H2O, two new minerals from Richelsdorf, Hesse, F. R. G.. Neues Jahrbuch für Mineralogie, Monatshefte: 1985: 145-154.
Hawthorne, F.C., Burke, E.A.J., Ercit, T.S., Grew, E.S., Grice, J.D., Jambor, J.L., Puziewicz, J., Roberts, A.C., Vanko, D.A. (1988) New mineral names. American Mineralogist: 73: 189-199.
Stahl, R., Jung, C., Lutz, H.D., Kockelmann, W., Jacobs, H. (1998) Kristallstrukturen und Wasserstoffbrückenbindungen bei β-Be(OH)2 und ε-Zn(OH)2. Zeitschrift für Anorganische und Allgemeine Chemie: 624: 1130-1136.
Jacobs, H., Niemann, A., Kockelmann, W. (2005) Low temperature investigations of hydrogen bridge bonds in the hydroxides β–Be(OH)2 and ε–Zn(OH)2 by Raman–spectroscopy as well as X–ray and neutron diffraction. Zeitschrift für Anorganische und Allgemeine Chemie: 631: 1247-1254.
Kusaba, K., Yagi, T., Yamaura, J., Miyajima, N., Kikegawa, T. (2007) Single-crystal to single-crystal phase transition with a large deformation in Zn(OH)2 under high-pressure. Chemical Physics Letters: 437: 61-65.
Kusaba, K., Kikegawa, T. (2008) Phase transitions of Zn(OH)2 under high pressure and high temperature. Solid State Communications: 148: 382-385.
Kusaba, K., Yagi, T., Yamaura, J., Gotou, H., Kikegawa, T. (2010) Structural consideration of phase transitions in Zn(OH)2 under high pressure. Journal of Physics: Conference Series: 215: 012001.
Anthony, J.W., Bideaux, R.A., Bladh, K.W., Nichols, M.C., Eds. Handbook of Mineralogy, Mineralogical Society of America, Chantilly, VA 20151-1110, USA. http://www.handbookofmineralogy.org/ (2016)

Internet Links for WülfingiteHide

Localities for WülfingiteHide

ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Germany
 
  • Hesse
    • Frankfurt
Blessing,C. & Pock,R. (1991). Mineralbildungen in Schlacken auf dem Gelände der ehemaligen Kupferwerke in Frankfurt/M-Heddernheim. Aufschluss, Jg.42, Nr.6, S.339-57
    • Richelsdorf District
      • Nentershausen
        • Süß
          • Richelsdorf Smelter
S. Weiß: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
  • North Rhine-Westphalia
    • Aachen
      • Stolberg
International Association of Collectors of Slag Minerals, 9 (3), 3-6; Blaß, G. & Graf, H. W. (1995): Neufunde von Schlackenhalden in der nördlichen Eifel (II). Mineralien-Welt, 6 (3), 28-31.
UK
 
  • England
    • Derbyshire
      • Ashover
        • Milltown
[Rust, S. Seltene Mineralien aus dem Steinbruch Milltown bei Ashover LAPIS Mineralienmagazin 1994, 12, p.13-17, 58]; Ford, T., A. Sarjeant & M. Smith (1993): The minerals of the Peak district of Derbyshire. UK Jour. Mines & Minerals 13, 16-55.
Mineral and/or Locality  
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