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A mineral, ZnCO3, sometimes used as a source of zinc.

[After James Smithson.]


(Minerals) a white mineral consisting of zinc carbonate in hexagonal crystalline form: occurs chiefly in dry limestone regions and is a source of zinc. Formula: ZnCO3. Also called (US): calamine
[C19: named after James Smithson]


(ˈsmɪθ səˌnaɪt)

a mineral, zinc carbonate, ZnCO3, found in crusts and masses: an ore of zinc.
[1825–35; after J. Smithson, who distinguished it from calamine; see -ite1]
References in periodicals archive ?
The vast collection of minerals--smooth turquoise smithsonite from New Mexico, spiky orange crocoite from Tasmania, dazzling purple amethyst from Uruguay, and large specimens of sulfur from Sicily--are recommended for a viewing at the Harvard Museum of Natural History.
Sarac, Dissolution Kinetics of Smithsonite Ore as an Alternative Zinc Source with an Organic Leach Reagent, JTICE, 40, 6 (2009).
Fe) S, and to a lesser extent smithsonite (ZnO3), willemite (Zn2SiO4), and zincite (ZnO) (Reimann and deCaritat, 1998).
John Bradshaw, Coast-to-Coast Rare Stones International, Nashua, New Hampshire, USA, for 21 bags containing part-cut crystals of: apatite (Canada and Mexico), cassiterite (Namibia), celestine (Kansas, USA), cerrusite (Namibia), crocoite (Tasmania, Australia), diaspore (Turkey), oligoclase (Kenya), pollucite (Conneticut, USA), scheelite (Pakistan and Arizona, USA), smithsonite (Namibia), sphalerite (Spain), tourmaline (Maine, USA, and Afghanistan), tugtupite (Greenland), willemite/leucophoenicite (New Jersey, USA) and zincite on calcite (New Jersey); and also for 95 faceted mixed-shape tourmalines, mostly pink, green and blue.
Smithsonite Contracting, Cameron Lyle Smith, 1320 Lakeway Dr.
Were it not for an unusual clause in his will bequeathing his entire fortune for the creation, in the United States of America, of a foundation to 'further the increase and diffusion of knowledge' then we would know him only for the mineral named in his honour, Smithsonite, and for coining the term 'silicate'.
Which metal is obtained from calamine or smithsonite ore?
6]} and smithsonite (ZnCO3) which passivate the zinc surface; that is, these oxidized species protect the metal from further corrosion.
The tablets were mainly made of the zinc carbonates hydrozincite and smithsonite, echoing the widespread use of zinc-based minerals in today's eye and skin medications.

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