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Smithsonite

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Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia
© 2001 John H. Betts

Show Smithsonite Photos (1074)
Formula:
ZnCO
 
3
System:TrigonalColour:White, grey, yellow, ...
Lustre:Vitreous, PearlyHardness:4 - 4½
Name:
Named after James Smithson (1754-1829), British chemist and mineralogist, founder of the Smithsonian Institution (Washington), who distinguished the mineral from calamine (hemimorphite).


Calcite Group.

Smithsonite is often found as a secondary mineral in the oxidization zone of zinc ore deposits. It can also be observed in sedimentary deposits and as a direct oxidization product of sphalerite.

Classification of Smithsonite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Explanation of status:Chemical analses were made by Smithson on specimens from Derbyshire and Somersetshire.
Strunz 8th edition ID:5/B.02-60
Nickel-Strunz 10th (pending) edition ID:5.AB.05

5 : CARBONATES (NITRATES)
A : Carbonates without additional anions, without H2O
B : Alkali-earth (and other M2+) carbonates
Dana 8th edition ID:14.1.1.6

14 : ANHYDROUS NORMAL CARBONATES
1 : A(XO3)
Hey's CIM Ref.:11.6.1

11 : Carbonates
6 : Carbonates of Zn and Cd
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Occurrences of Smithsonite

Geological Setting:Oxidized zones of zinc ore deposits.

Physical Properties of Smithsonite

Lustre:Vitreous, Pearly
Diaphaneity (Transparency):Translucent
Colour:White, grey, yellow, green to apple-green, blue, pink, purple, bluish grey, and brown; colourless or faintly tinted in transmitted light.
Streak:White
Hardness (Mohs):4 - 4½
Tenacity:Brittle
Cleavage:Very Good
On {1011}.
Fracture:Irregular/Uneven, Sub-Conchoidal
Translation gliding:Translation gliding with T{0001}, t{1010}.
Density (measured):4.42 - 4.44 g/cm3
Density (calculated):4.43 g/cm3

Crystallography of Smithsonite

Crystal System:Trigonal
Class (H-M):3m (3 2/m) - Hexagonal Scalenohedral
Space Group:R3c {R3 2/c}
Cell Parameters:a = 4.6526(7) Å, c = 15.0257(22) Å
Ratio:a:c = 1 : 3.23
Unit Cell Volume:V 281.68 ų (Calculated from Unit Cell)
Morphology:Crystals rhombohedral {1011}; less commonly {0221}. Crystal faces usually curved and rough or composite; rarely scalenohedral. Botryoidal, reniform, or stalactitic; incrustations; coarsely granular to compact massive; earthy, friable.
Twinning:None observed.
Crystal Atlas:
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Smithsonite no.1 - Goldschmidt (1913-1926)
Smithsonite no.13 - Goldschmidt (1913-1926)

About Crystal Atlas

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Epitaxial Relationships of Smithsonite

Epitaxial Minerals:
ZinciteOtaviteCalcite
Epitaxi Comments:Smithsonite upon calcite with parallel axes. Oriented pseudomorphs of ZnO are formed by thermal dissociation. Otavite oriented growths on smithsonite (Tsumeb).
X-Ray Powder Diffraction:
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Radiation - Copper Kα
Data Set:
Horizontal Axis: ° to ° Vertical Axis: % Source Data: Filtered Data: Peaks:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Optical Data of Smithsonite

Type:Uniaxial (-)
RI values: nω = 1.842 - 1.850 nε = 1.619 - 1.623
Maximum Birefringence:δ = 0.223 - 0.227

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High

Chemical Properties of Smithsonite

Formula:
ZnCO
 
3
Essential elements:C, O, Zn
All elements listed in formula:C, O, Zn
CAS Registry number:3486-35-9

CAS Registry numbers are published by the American Chemical Society
Common Impurities:Fe,Co,Cu,Mn,Ca,Cd,Mg,In

Relationship of Smithsonite to other Species

Member of Group:
Calcite Group:
AXO
 
3
Common Associates:
WillemitePyromorphiteMimetiteMalachiteHydrozincite
HemimorphiteCerussiteAzuriteAurichalciteAnglesite
Related Minerals - Nickel-Strunz Grouping):

- +
5.AB.05Calcite
CaCO
 
3
5.AB.05Gaspéite
(Ni,Mg,Fe)CO
 
3
5.AB.05Magnesite
MgCO
 
3
5.AB.05Otavite
CdCO
 
3
5.AB.05Rhodochrosite
MnCO
 
3
5.AB.05Siderite
FeCO
 
3
5.AB.05Spherocobaltite
CoCO
 
3
5.AB.10Ankerite
Ca(Fe
2+
 
 ,Mg,Mn
2+
 
)(CO
 
3
)
 
2
5.AB.10Dolomite
CaMg(CO
 
3
)
 
2
5.AB.10Kutnohorite
Ca(Mn,Mg,Fe)(CO
 
3
)
 
2
5.AB.10Minrecordite
CaZn(CO
 
3
)
 
2
5.AB.15Aragonite
CaCO
 
3
5.AB.15Cerussite
PbCO
 
3
5.AB.15Strontianite
SrCO
 
3
5.AB.15Witherite
BaCO
 
3
5.AB.20Vaterite
CaCO
 
3
5.AB.25Huntite
CaMg
 
3
(CO
 
3
)
 
4
5.AB.30Norsethite
BaMg(CO
 
3
)
 
2
5.AB.35Alstonite
BaCa(CO
 
3
)
 
2
5.AB.40Olekminskite
Sr(Sr,Ba)(CO
 
3
)
 
2
5.AB.40Paralstonite
BaCa(CO
 
3
)
 
2
5.AB.45Barytocalcite
BaCa(CO
 
3
)
 
2
5.AB.50Carbocernaite
(Ca,Na)(Sr,Ce,Ba)(CO
 
3
)
 
2
5.AB.55Benstonite
(Ba,Sr)
 
6
(Ca,Mn)
 
6
Mg(CO
 
3
)
 
13
5.AB.60Juangodoyite
Na
 
2
Cu(CO
 
3
)
 
2
Related Minerals - Hey's Index Grouping:

- +
11.6.2Hydrozincite
Zn
 
5
[(OH)
 
3
|CO
 
3
]
 
2
11.6.3Rosasite
(Cu,Zn)
 
2
[(OH)
 
2
|CO
 
3
]
11.6.4Zincrosasite
(Zn,Cu)
 
2
[(OH)
 
2
|CO
 
3
]
11.6.5Aurichalcite
(Zn,Cu)
 
5
[(OH)
 
3
|CO
 
3
]
 
2
11.6.6Claraite
(Cu,Zn)
 
3
[(OH)
 
4
|CO
 
3
] · 4H
 
2
O
11.6.7Minrecordite
CaZn(CO
 
3
)
 
2
11.6.8Loseyite
(Zn,Mn
2+
 
)
 
7
[(OH)
 
5
|CO
 
3
]
 
2
11.6.9Sclarite
(Zn,Mg,Mn
2+
 
)
 
4
Zn
 
3
[(OH)
 
5
|CO
 
3
]
 
2
11.6.10Otavite
CdCO
 
3

Other Names for Smithsonite

Synonyms:
Aztec StoneAzurite (of ?)BonamiteCarbonate of ZincSmithsonite (of Beudant)
Zinc Spar
Other Languages:
French:Zinc carbonaté
German:Capnit
Kapnit
Kohlengalmei
Smithsonit
Zincspath
Zinkischer Carbonspat
Zinkspat
Zinkspath
Japanese:菱亜鉛鉱
Latin:Zincum acido aëro mineralisatum
Russian:Смитсонит
Spanish:Smithsonita
Varieties:
Cadmian SmithsoniteCobaltoan SmithsoniteCuprian SmithsoniteDry Bone OreHerrerite
MonheimiteTurkey-Fat Ore

Other Information

Fluorescence in UV light:May fluoresce pale green or pale blue.
Other Information:Soluble in acids with effervescence.
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
External LinksSearch for toxicity information at the United States National Library of Medicine
Industrial Uses:Ore of zinc.

References for Smithsonite

Reference List:Bergmann, T. (1780) Opuscula of Tobernus Bergmann: 209.

Bergmann, T. (1782) Sciagraphia regni mineralis: 144.

Brongniart, A. (1827): 47 (as Zinc carbonaté).

Beudant, F.S. (1832), Trailé élémentaire de Minéralogie, second edition, 2 volumes: 2: 354.

Dana, J.D. (1837) System of Mineralogy, 1st. edition, New Haven: 211.

Dana J.D. (1844) System of Mineralogy, 2nd. Edition, New York: 263.

Monheim (1850) Journal für praktische Chemie, Leipzig: 49: 382.

Monheim (1851) Neues Jahrbuch für Mineralogie, Geologie und Paleontologie, Heidelberg, Stuttgart: 705.

Dana, J.D. (1854) System of Mineralogy, 4th. Edition, New York: 447.

Breithaupt, A. (1841) Vollständige Handbuch der Mineralogie Vol. 2: 236 241.

Tanner (1874) Chemical News and Journal of Industrial Science, London: 30: 141.

Christomanos (1896) Comptes rendu de l’Académie des sciences de Paris: 123: 62.

Ortloff (1896) Zeitschrift für Physikalische Chemie, Leipzig, Berlin: 19: 214.

Bergt (1903) Isis: 1: 20.

Buttgenbach (1906) Bulletin de la Société française de Minéralogie: 29: 190.

Doelter, C. (1911) Handbuch der Mineral-chemie (in 4 volumes divided into parts): 1: 443.

Manasse (1911) Mem. Soc. Tosc.: 27: 76.

Pilipenko (1915) Bulletin of the Imperial Tomsk University: 763.

Honess (1918) American Journal of Science: 45: 217.

Johnsen and Veit (1918) Centralblatt für Mineralogie, Geologie und Paleontologie, Stuttgart: 265.

Goldschmidt, V. (1923) Atlas der Krystallformen. 9 volumes, atlas, and text: vol. 9. Heidelberg: 117.

Müller (1924) Ind. Eng. Chem.: 16: 604.

Headden (1925) American Mineralogist: 10: 18.

Mountain (1926) Mineralogical Magazine: 21: 51.

Hintze, Carl (1927) Handbuch der Mineralogie. Berlin and Leipzig. 6 volumes: 1 [3A]: 3243.

Palache, C. (1928) American Mineralogist: 13: 321.

Goldschmidt and Hauptmann (1932) Gesellschaft der Wissenschaften zu Göttingen , Berlin. Mathematisch-physikalische Klasse, Nachrichten: 53.

Mehmet and Valensi (1935) Bull. Soc. chim. France: 2: 1295.

Schaller and Fairchild (1938) American Mineralogist: 23: 894.

Rose (1939) Comptes rendu de l’Académie des sciences de Paris: 208: 1914.

Neuhaus (1944) Ber. Freiberger Geol. Ges., no. 20: 39.

Rose (1948) Bulletin de la Société française de Minéralogie: 71: 15.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged: 176-181.

American Mineralogist (1954): 39: 47.

Zeitschrift für Kristallographie (1981): 156: 233-243.

Reviews in Mineralogy, Mineralogical Society of America: 11.

Anthony, J.W., Bideaux, R.A., Bladh, K.W., and Nichols, M.C. (2003) Handbook of Mineralogy, Volume V. Borates, Carbonates, Sulfates. Mineral Data Publishing, Tucson, AZ, 813pp.: 652.

Internet Links for Smithsonite

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  • Raman and XRD data at RRUFF project
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