Smithite (original) (raw)
A valid IMA mineral species - grandfathered
About SmithiteHide
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Colour:
Pale red; red-orange or brownish orange on exposure to light
Crystal System:
Monoclinic
Name:
Named in honor of George Frederick Herbert Smith (26 May 1872, Edgbaston, England, UK - 20 April 1953), crystallographer and curator, British Museum of Natural History, London (England). The mineral herbertsmithite is also named after him.
This page provides mineralogical data about Smithite.
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:3687:6
cb4f00f2-84cd-4298-b286-fc4402f28102
IMA Classification of SmithiteHide
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Approved, 'Grandfathered' (first described prior to 1959)
Type description reference:
Classification of SmithiteHide
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2.GC.30
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
G : Sulfarsenites, sulfantimonites, sulfbismuthites
C : Poly-sulfarsenites
3.7.3.1
3 : SULFOSALTS
7 : ø = 2
5.2.1
5 : Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)
2 : Sulpharsenites etc. of Ag
Mineral SymbolsHide
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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Sth | 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 SmithiteHide
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Colour:
Pale red; red-orange or brownish orange on exposure to light
Cleavage:
Perfect
{100} perfect
Density:
4.88 g/cm3 (Measured) 4.926 g/cm3 (Calculated)
Optical Data of SmithiteHide
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Dispersion:
marked to extreme
Optical Extinction:
Y = b; Z ∧ c = 6.5°.
Reflectivity:
| Wavelength | R1 | R2 |
|---|---|---|
| 400nm | 40.7% | 44.0% |
| 420nm | 40.0% | 43.2% |
| 440nm | 39.3% | 42.4% |
| 460nm | 38.7% | 41.5% |
| 480nm | 37.9% | 40.4% |
| 500nm | 37.0% | 39.2% |
| 520nm | 36.0% | 38.0% |
| 540nm | 35.0% | 36.6% |
| 560nm | 33.8% | 35.4% |
| 580nm | 32.7% | 34.7% |
| 600nm | 32.0% | 34.0% |
| 620nm | 31.4% | 33.4% |
| 640nm | 31.0% | 32.9% |
| 660nm | 30.6% | 32.4% |
| 680nm | 30.4% | 31.8% |
| 700nm | 30.1% | 31.4% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 44.0%.
R1 shown in black, R2 shown in red
Comments:
Slight in transmitted light.
Chemistry of SmithiteHide
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Crystallography of SmithiteHide
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Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 17.23 Å, b = 7.78 Å, c = 15.19 Å
β = 101.2°
Ratio:
a:b:c = 2.215 : 1 : 1.952
Unit Cell V:
1,997.43 ų (Calculated from Unit Cell)
Morphology:
Equant; tabular {100}. Tabular crystals appear hexagonal due to strong zonal developments nearly 60° apart.
Comment:
Space Group: A2/a.
Crystallographic forms of SmithiteHide
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Crystal Atlas:
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3d models and HTML5 code kindly provided bywww.smorf.nl.
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Crystal StructureHide
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| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0014690 | Smithite | Hellner E, Burzlaff H (1964) Die struktur des smithits AgAsS2 Naturwissenschaften 51 35-36 | 1964 | Lengenbach quarry, Binnatal, Switzerland | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.82 Å | (100) |
| 3.21 Å | (80) |
| 2.72 Å | (60) |
| 1.953 Å | (50) |
| 1.701 Å | (40) |
| 1.661 Å | (40) |
| 1.608 Å | (40) |
Geological EnvironmentHide
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Type Occurrence of SmithiteHide
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Place of Conservation of Type Material:
Associated Minerals at Type Locality:
Reference:
Solly, R.H. (1905) Some new minerals from the Binnenthal, Switzerland. Mineralogical Magazine: 14: 72-82.
Synonyms of SmithiteHide
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Other Language Names for SmithiteHide
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Common AssociatesHide
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Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat GroupingHide
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Other InformationHide
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Special Storage/
Display Requirements:
becoming opaque on exposure to light
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 SmithiteHide
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References for SmithiteHide
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Localities for SmithiteHide
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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
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- 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.
| Chile | |
|---|---|
| Atacama Copiapó Province Tierra Amarilla Pampa Larga mining district Alacrán ⓘ Alacrán Mine | Maurizio Dini |
| France | |
| Provence-Alpes-Côte d'Azur Hautes-Alpes Gap La Chapelle-en-Valgaudemar ⓘ Jas Roux | Nakai et al. (1983) +1 other reference |
| Germany | |
| Baden-Württemberg Karlsruhe Region Rhein-Neckar-Kreis Wiesloch ⓘ Segen Gottes Mine | Weiß (1990) |
| Hesse Darmstadt Darmstadt-Dieburg Mühltal Nieder-Beerbach ⓘ Glasberg quarry | Weiß (1990) |
| Iran | |
| West Azerbaijan Province Sardasht County Sardasht ⓘ Barika ore deposit | Topa et al. (2013) |
| Ireland | |
| Munster Tipperary County Silvermines District ⓘ Mogul Mine (Garryard Mine; International Mogul Mines) | Gasparrini (1978) +4 other references |
| Japan | |
| Tochigi Prefecture Nikko City Kuriyamamura ⓘ Nishizawa mine | Shimizu et al. (2007) |
| Peru | |
| Lima Oyón Province Oyón District ⓘ Uchucchacua Mine |
EDS Analysis Frank Keutsch |
| Poland | |
| Podlaskie Voivodeship Suwałki County Suwałki Massif ⓘ Krzemianka | Kucha H. 1982: Haycockite and ... |
| Spain | |
| Andalusia Almería Cuevas del Almanzora Las Herrerías ⓘ Las Herrerías Mines | Navarro et al. (2009) |
| Switzerland (TL) | |
| Valais Goms Binn Fäld ⓘ Lengenbach Quarry (TL) | Solly (1905) +1 other reference |
| ⓘ Reckibach | 50. (in German) +2 other references |