Ashoverite
A valid IMA mineral species
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About Ashoverite
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.
Unique Identifiers
Mindat ID:
453
Long-form identifier:
mindat:1:1:453:4
GUID
(UUID V4):
(UUID V4):
21bd80b0-338e-4843-af73-66bb4763f3ad
IMA Classification of Ashoverite
Approved
Classification of Ashoverite
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
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
6 : HYDROXIDES AND OXIDES CONTAINING HYDROXYL
2 : X(OH)2
7.5.3
7 : Oxides and Hydroxides
5 : Oxides of Zn, Cd and Hg
7 : Oxides and Hydroxides
5 : Oxides of Zn, Cd and Hg
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Aov | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Ashoverite
Vitreous, Dull
Transparency:
Translucent
Colour:
Colourless, milky
Streak:
White
Cleavage:
Perfect
on {001}
on {001}
Density:
3.3 g/cm3 (Measured) 3.44 g/cm3 (Calculated)
Optical Data of Ashoverite
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.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Chemistry of Ashoverite
Mindat Formula:
Zn(OH)2
Elements listed:
Crystallography of Ashoverite
Crystal System:
Tetragonal
Cell Parameters:
a = 6.825(2) Å, c = 33.36(4) Å
Ratio:
a:c = 1 : 4.888
Unit Cell V:
1,553.93 ų (Calculated from Unit Cell)
Z:
32
Comment:
Point Group: 4/m 2/m 2/m, 42m, or 4mm.; Space Group: I41/amd, I42d, or I41md.
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
2.902 Å | (100) |
1.819 Å | (33) |
1.702 Å | (21) |
1.470 Å | (19) |
3.031 Å | (13) |
1.0063 Å | (13) |
3.332 Å | (11) |
Comments:
Recorded on type material
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 7: Great Oxidation Event | <2.4 |
47a : [Near-surface hydration of prior minerals] | |
Stage 10b: Anthropogenic minerals | <10 Ka |
56 : Slag and smelter minerals (see also #51 and #55) |
Type Occurrence of Ashoverite
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:
Reference:
Clark, A.M., Fejer, E.E., Cressey, G., Tandy, P.C. (1988) Ashoverite, a new mineral, and other polymorphs of Zn(OH)2 from Milltown, Ashover, Derbyshire. Mineralogical Magazine 52, 699-702.
Synonyms of Ashoverite
Other Language Names for Ashoverite
German:Ashoverit
Spanish:Ashoverita
Common Associates
Associated Minerals Based on Photo Data:
6 photos of Ashoverite associated with Fluorite | CaF2 |
5 photos of Ashoverite associated with Sweetite | Zn(OH)2 |
4 photos of Ashoverite associated with Calcite | CaCO3 |
3 photos of Ashoverite associated with Baryte | BaSO4 |
2 photos of Ashoverite associated with Unnamed (gamma-Zn(OH)2) | γ-Zn(OH)2 |
1 photo of Ashoverite associated with Hydrozincite | Zn5(CO3)2(OH)6 |
1 photo of Ashoverite associated with Lepidocrocite | γ-Fe3+O(OH) |
Related Minerals - Strunz-mindat Grouping
4.FA.05a | Behoite | Be(OH)2 |
4.FA.05b | Clinobehoite | Be(OH)2 |
4.FA.10 | Sweetite | Zn(OH)2 |
4.FA.10 | Wülfingite | Zn(OH)2 |
Fluorescence of Ashoverite
SW UV: bluish white
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.
Internet Links for Ashoverite
mindat.org URL:
https://www.mindat.org/min-453.html
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References for Ashoverite
Reference List:
Localities for Ashoverite
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and 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 (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Germany | |
| Anthony (1997) |
Schnorrer-Köhler (1988) | |
Italy | |
| Rivista Mineralogica Italiana (3) |
Namibia | |
| Walter Kahn specimen analyzed by SEM ... |
Russia | |
| Ivashchenko et al. (2011, September) |
Ivashchenko et al. (2011, September) | |
UK (TL) | |
| Mineralogical Magazine (1988) +2 other references |
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Milltown Quarry, Milltown, Ashover, North East Derbyshire District, Derbyshire, England, UK