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|Name:||For the type locality.|
This page provides mineralogical data about Ashoverite.
Classification of Ashoverite
|Strunz 8th edition ID:||4/F.03-70|
|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:||126.96.36.199|
6 : HYDROXIDES AND OXIDES CONTAINING HYDROXYL
2 : X(OH)2
|Hey's CIM Ref.:||7.5.3|
7 : Oxides and Hydroxides
5 : Oxides of Zn, Cd and Hg
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Type Occurrence of Ashoverite
|Type Locality:||Milltown Quarry, Milltown, Ashover, Derbyshire, England, UK|
|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)|
|Year of Discovery:||1988|
|Geological Setting of type material:||Oxidized vein in limestone|
|Associated Minerals at type locality:|
Physical Properties of Ashoverite
|Density (measured):||3.3 g/cm3|
|Density (calculated):||3.44 g/cm3|
Crystallography of Ashoverite
|Cell Parameters:||a = 6.825Å, c = 33.36Å|
|Ratio:||a:c = 1 : 4.888|
|Unit Cell Volume:||V 1,553.93 Å³ (Calculated from Unit Cell)|
|X-Ray Powder Diffraction:|
|Comments:||Recorded on type material|
Optical Data of Ashoverite
|RI values:||nω = 1.629 nε = 1.639|
|Maximum Birefringence:||δ = 0.010|
Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Chemical Properties of Ashoverite
|Simplified for copy/paste:||Zn(OH)2|
|Essential elements:||H, O, Zn|
|All elements listed in formula:||H, O, Zn|
|Analytical Data:||Averages of eight electron microprobe analyses of type material; total water content determined in a CHN analyzer (i.e. by IR spectrophotometry) and recalculated to 2(OH,O), since thought to lose water under the electron beam|
ZnO (84.46) PbO (2.06) CdO (0.71) CaO (0.15) H2O (14.9) sum 102.28 wt.-%
Relationship of Ashoverite to other Species
|Related Minerals - Nickel-Strunz Grouping):|
|Related Minerals - Hey's Index Grouping:|
Other Names for Ashoverite
|Fluorescence in UV light:||SW UV: bluish white|
|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 Ashoverite
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 Ashoverite
Localities for Ashoverite
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.
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Locality Updated: Quelhas do Velho Mine, Antas, Penalva do Castelo, Viseu District, PortugalFrom Rui Nunes, 21st Oct 2014 16:52:56