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Wülfingite

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Milltown Quarry, Milltown, Ashover, Derbyshire, England, UK
© Steve Rust

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Formula:
Zn(OH)
 
2
System:OrthorhombicColour:Colourless, white
Hardness:3
Name:Name after Ernst Anton Wülfing (1860-1930), Professor of Mineralogy, Heidelberg University (Germany).
This page provides mineralogical data about Wülfingite.

Classification of Wülfingite

IMA status:Approved 1983
Strunz 8th edition ID:4/F.03-60
Nickel-Strunz 10th (pending) edition ID: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
Dana 8th edition ID:6.2.10.1

6 : HYDROXIDES AND OXIDES CONTAINING HYDROXYL
2 : X(OH)2
Hey's CIM Ref.:7.5.4

7 : Oxides and Hydroxides
5 : Oxides of Zn, Cd and Hg
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Type Occurrence of Wülfingite

Type Locality:Slag dumps, Richelsdorf Smelter, Süss, Richelsdorf District, North Hesse, Hesse, Germany
Year of Discovery:1985

Physical Properties of Wülfingite

Lustre:Waxy
Diaphaneity (Transparency):Transparent, Translucent
Colour:Colourless, white
Hardness (Mohs):3

Crystallography of Wülfingite

Crystal System:Orthorhombic
Cell Parameters:a = 8.49Å, b = 5.16Å, c = 4.91Å
Ratio:a:b:c = 1.645 : 1 : 0.952
Unit Cell Volume:V 215.10 ų (Calculated from Unit Cell)

Optical Data of Wülfingite

Type:Biaxial (+)
RI values: nα = 1.572 nβ = 1.578 nγ = 1.580
2V:Measured: 60° , Calculated: 60°
Maximum Birefringence:δ = 0.008

Chart 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 Wülfingite

Formula:
Zn(OH)
 
2
Essential elements:H, O, Zn
All elements listed in formula:H, O, Zn

Relationship of Wülfingite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.FA.05aBehoite
Be(OH)
 
2
4.FA.05bClinobehoite
Be(OH)
 
2
4.FA.10Ashoverite
Zn(OH)
 
2
4.FA.10Sweetite
Zn(OH)
 
2
Related Minerals - Hey's Index Grouping:

- +
7.5.1Zincite
(Zn,Mn
2+
 
,Fe
2+
 
)O
7.5.2Sweetite
Zn(OH)
 
2
7.5.3Ashoverite
Zn(OH)
 
2
7.5.5Gahnite
ZnAl
 
2
O
 
4
7.5.6Hetaerolite
ZnMn
 
2
O
 
4
7.5.7Hydrohetaerolite
ZnMn
 
2
O
 
4
·H
 
2
O
7.5.8Chalcophanite
(Zn,Fe,Mn)Mn
 
3
O
 
7
·3H
 
2
O
7.5.9Woodruffite
Zn(Mn
4+
 
,Mn
3+
 
)
 
5
O
 
10
·3½H
 
2
O
7.5.10Franklinite
Zn
2+
 
Fe
3+
2
O
 
4
7.5.11Monteponite
CdO
7.5.12Montroydite
HgO

Other Names for Wülfingite

Synonyms:
IMA1983-070
Other Languages:
German:Wulfingit
Russian:Вюльфингит
Spanish:Wulfingita

Other Information

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

References for Wülfingite

Reference List:Schmetzer, K., Schnorrer-Köhler, G. & Medenbach, O. (1985): Wülfingite, epsilon-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.

American Mineralogist (1988): 73: 196-197.

Internet Links for Wülfingite

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    Localities for Wülfingite

    Hide Locality List
    The 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. ? 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.
    Germany
     
    • Hesse
      • North Hesse
        • Richelsdorf District
          • 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
    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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