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Ashoverite

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Formula:
Zn(OH)2
Colour:
Colourless, milky
Lustre:
Vitreous, Dull
Specific Gravity:
3.3
Crystal System:
Tetragonal
Name:
For the type locality.
This page provides mineralogical data about Ashoverite.


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Classification of AshoveriteHide

Approved
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
6.2.11.1

6 : HYDROXIDES AND OXIDES CONTAINING HYDROXYL
2 : X(OH)2
7.5.3

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

Physical Properties of AshoveriteHide

Vitreous, Dull
Transparency:
Translucent
Colour:
Colourless, milky
Streak:
White
Cleavage:
Perfect
on {001}
Density:
3.3 g/cm3 (Measured)    3.44 g/cm3 (Calculated)

Optical Data of AshoveriteHide

Type:
Uniaxial (+)
RI values:
nω = 1.629 nε = 1.639
Max Birefringence:
δ = 0.010
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of AshoveriteHide

Formula:
Zn(OH)2

Crystallography of AshoveriteHide

Crystal System:
Tetragonal
Cell Parameters:
a = 6.825 Å, c = 33.36 Å
Ratio:
a:c = 1 : 4.888
Unit Cell V:
1,553.93 ų (Calculated from Unit Cell)
Z:
32

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.902 (100)
1.819 (33)
1.702 (21)
1.470 (19)
3.031 (13)
1.0063 (13)
3.332 (11)
Comments:
Recorded on type material

Type Occurrence of AshoveriteHide

General Appearance of Type Material:
Square plates to about 0.5 mm, markedly thinning toward their edges; commonly in stellate groups of crystals intersecting at angles of 60°-70°
Place of Conservation of Type Material:
The Natural History Museum, London, England (No. 1982,5)
Geological Setting of Type Material:
Oxidized vein in limestone
Associated Minerals at Type Locality:

Synonyms of AshoveriteHide

Other Language Names for AshoveriteHide

German:Ashoverit
Spanish:Ashoverita

Common AssociatesHide

Associated Minerals Based on Photo Data:
Fluorite3 photos of Ashoverite associated with Fluorite on mindat.org.
Sweetite2 photos of Ashoverite associated with Sweetite on mindat.org.
Unnamed (gamma-Zn(OH)2)2 photos of Ashoverite associated with Unnamed (gamma-Zn(OH)2) on mindat.org.
Calcite1 photo of Ashoverite associated with Calcite on mindat.org.
Hydrozincite1 photo of Ashoverite associated with Hydrozincite on mindat.org.

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.10SweetiteZn(OH)2Tet.
4.FA.10WülfingiteZn(OH)2Orth. 2 2 2 : P21 21 21

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

7.5.1ZinciteZnOHex. 6mm : P63mc
7.5.2SweetiteZn(OH)2Tet.
7.5.4WülfingiteZn(OH)2Orth. 2 2 2 : P21 21 21
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

Fluorescence of AshoveriteHide

SW UV: bluish white

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 AshoveriteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Mineralogical Magazine (1988): 52: 699.
Clark, A. M., Fejer, E. E., Cressey, G. and Tandy, P. C. (1988): Ashoverite, a new mineral, and other polymorphs of Zn(OH)2 from Milltown, Ashover, Derbyshire. Mineralogical Magazine 52, 699-702. - American Mineralogist (1990) 75, 431 (abstract).
Schnorrer-Köhler, G. (1988): Mineralogische Nozizen IV. Der Aufschluss 39, 153-168 (in German).
Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 28.

Internet Links for AshoveriteHide

Localities for AshoveriteHide

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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - 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
 
  • Lower Saxony
    • Harz
      • Goslar
        • Astfeld
Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 28
Schnorrer-Köhler, G. (1988): Mineralogische Notizen IV. Der Aufschluss, 39, 153-168.
Italy
 
  • Liguria
    • Genova Province
      • Genova
        • Varenna Valley
Rivista Mineralogica Italiana, 22 (3), 39-41.
Namibia
 
  • Otjikoto Region (Oshikoto)
    • Tsumeb
Walter Kahn specimen analyzed by SEM EDS and XRD.
Russia
 
  • Northern Region
    • Karelia Republic
      • Ladoga Region
Ivashchenko, V. I., Valkama, M., Sundblad, K., Golubev, A. I., & Alekseev, V. Y. (2011, September). New data on mineralogy and metallogeny of scarns in the Pitkyaranta ore region. In Doklady Earth Sciences (Vol. 440, No. 1, pp. 1307-1311). SP MAIK Nauka/Interperiodica
UK (TL)
 
  • England
    • Derbyshire
      • Ashover
        • Milltown
Mineralogical Magazine(1988) 52, 699-702; UKJMM No10; 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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