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Zinc carbonate
Identifiers
CAS Number	3486-35-9; basic: 5263-02-5;
3D model (JSmol)	Interactive image;
ChemSpider	17943; monohydrate: 11570234; basic: 10129674;
ECHA InfoCard	100.020.435
EC Number	222-477-6; basic: 226-076-7;
PubChem CID	19005; basic: 11955398;
UNII	K8290PTQ4F;
UN number	9157
CompTox Dashboard (EPA)	DTXSID5049817 ;
	InChI InChI=1S/CH2O3.Zn/c2-1(3)4;/h(H2,2,3,4);/q;+2/p-2 Key: FMRLDPWIRHBCCC-UHFFFAOYSA-L;
	SMILES C(=O)([O-])[O-].[Zn+2];
Properties
Chemical formula	ZnCO3
Molar mass	125.4
Appearance	white solid
Density	4.434 g/cm3
Melting point	140 °C (284 °F; 413 K) (decomposes)
Solubility in water	0.91 mg/L
Solubility product (Ksp)	1.46×10−10
Magnetic susceptibility (χ)	-34×10−6 cm3/mol
Refractive index (nD)	n1=1.621, n2=1.848
Structure
Crystal structure	Calcite, hR30, No. 167
Space group	R3c
Lattice constant	a = 4.6528 Å, c = 15.025 Å
Formula units (Z)	6
Hazards
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H319, H410, H411
Precautionary statements	P264, P273, P280, P302+P352, P305+P351+P338, P321, P332+P313, P337+P313, P362, P391, P501
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Zinc carbonate is the inorganic compound with the formula ZnCO₃. It is a white solid that is insoluble in water. It exists in nature as the mineral smithsonite. It is prepared by treating cold solutions of zinc sulfate with potassium bicarbonate. Upon warming, it converts to basic zinc carbonate (Zn₅(CO₃)₂(OH)₆).^[6]

Zinc carbonate adopts the same structure as calcium carbonate (calcite).^[7] Zinc is octahedral and each carbonate is bonded to six Zn centers such that oxygen atoms are three-coordinate.

References

^ ^a ^b ^c Haynes, p. 4.95
^ Haynes, p. 5.178
^ Haynes, p. 4.131
^ Haynes, p. 4.137
^ Haynes, p. 4.144
^ Wagenknecht, F.; Juza, R. (1963). "Zinc carbonate". In G. Brauer (ed.). Handbook of Preparative Inorganic Chemistry, 2nd Ed. Vol. 2. NY, NY: Academic Press. p. 1086.
^ Effenberger, H.; Mereiter, K.; Zemann, J. (1981). "Crystal structure refinements of magnesite, calcite, rhodochrosite, siderite, smithonite, and dolomite, with discussion of some aspects of the stereochemistry of calcite type carbonates". Zeitschrift für Kristallographie - Crystalline Materials. 156 (3–4): 233–243. Bibcode:1981ZK....156..233E. doi:10.1524/zkri.1981.156.3-4.233.