Sweetite
A valid IMA mineral species
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About Sweetite
Formula:
Zn(OH)2
Colour:
White; colorless
Lustre:
Vitreous
Specific Gravity:
3.33
Crystal System:
Tetragonal
Name:
Named after Jessie May Sweet (1901-1979), Curator of Minerals, The British Museum.
This page provides mineralogical data about Sweetite.
Unique Identifiers
Mindat ID:
3846
Long-form identifier:
mindat:1:1:3846:7
IMA Classification of Sweetite
Approved
Approval year:
1983
Classification of Sweetite
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
6.2.9.1
6 : HYDROXIDES AND OXIDES CONTAINING HYDROXYL
2 : X(OH)2
6 : HYDROXIDES AND OXIDES CONTAINING HYDROXYL
2 : X(OH)2
7.5.2
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 for Standard |
|---|---|---|
| Sw | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Pronunciation of Sweetite
Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Jolyon Ralph | United Kingdom |
Physical Properties of Sweetite
Vitreous
Transparency:
Transparent, Translucent
Colour:
White; colorless
Density:
3.33 g/cm3 (Measured) 3.41 g/cm3 (Calculated)
Optical Data of Sweetite
Type:
Uniaxial (-)
RI values:
nω = 1.635 nε = 1.628
Max. Birefringence:
δ = 0.007
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
Surface Relief:
Moderate
Chemistry of Sweetite
Mindat Formula:
Zn(OH)2
Elements listed:
Crystallography of Sweetite
Crystal System:
Tetragonal
Class (H-M):
422 - Trapezohedral
Cell Parameters:
a = 8.222(5) Å, c = 14.34(1) Å
Ratio:
a:c = 1 : 1.744
Unit Cell V:
969.40 ų (Calculated from Unit Cell)
Z:
20
Morphology:
Tetragonal bipyramids
Comment:
Space Group: P41212 or P43212 (probable).
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.922 Å | (100) |
| 3.572 Å | (60) |
| 4.53 Å | (37) |
| 1.764 Å | (24) |
| 2.708 Å | (18) |
| 2.257 Å | (17) |
| 1.560 Å | (14) |
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 Sweetite
Place of Conservation of Type Material:
The Natural History Museum, London, England, 1982,4.
Associated Minerals at Type Locality:
Synonyms of Sweetite
Other Language Names for Sweetite
Common Associates
Associations Based on Photo Data:
| 5 photos of Sweetite associated with Fluorite | CaF2 |
| 5 photos of Sweetite associated with Ashoverite | Zn(OH)2 |
| 4 photos of Sweetite associated with Calcite | CaCO3 |
| 3 photos of Sweetite associated with Baryte | BaSO4 |
| 2 photos of Sweetite associated with Smithsonite | ZnCO3 |
| 1 photo of Sweetite associated with Sphalerite | ZnS |
| 1 photo of Sweetite associated with 'Unnamed (gamma-Zn(OH)2)' | γ-Zn(OH)2 |
| 1 photo of Sweetite associated with Hemimorphite | Zn4Si2O7(OH)2 · H2O |
Related Minerals - Strunz-mindat Grouping
| 4.FA.05b | Clinobehoite | Be(OH)2 |
| 4.FA.05a | Behoite | Be(OH)2 |
| 4.FA.10 | Ashoverite | Zn(OH)2 |
| 4.FA.10 | Wülfingite | Zn(OH)2 |
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 Sweetite
mindat.org URL:
https://www.mindat.org/min-3846.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
Mineral Dealers:
References for Sweetite
Reference List:
Clark, A. M., Fejer, E. E., Couper, A. G., Jones, G. C. (1984) Sweetite, a new mineral from Derbyshire. Mineralogical Magazine, 48 (347) 267-269 doi:10.1180/minmag.1984.048.347.12
Localities for Sweetite
Showing 4 localities.
symbol to view information about a locality.
The 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).
All localities listed without proper references should be considered as questionable.
Germany | |
| |
| Schnorrer (1993) | |
Tunisia | |
| Dill |
UK (TL) | |
| Mineralogical Magazine (1984) +2 other references |
Quick NavTopAbout SweetiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPronunciation Physical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Milltown Quarry, Milltown, Ashover, North East Derbyshire District, Derbyshire, England, UK