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Nickel(II) carbonate describes one or a mixture of inorganic compounds containing nickel and carbonate. From the industrial perspective, the most important nickel carbonate is basic nickel carbonate with the formula Ni4CO3(OH)6(H2O)4. Simpler carbonates, ones more likely encountered in the laboratory, are NiCO3 and its hexahydrate. All are paramagnetic green solids containing Ni2+ cations. The basic carbonate is an intermediate in the hydrometallurgical purification of nickel from its ores and is used in electroplating of nickel.[3]

Nickel(II) carbonate
Nickel(II) carbonate
Calcium-carbonate-xtal-3D-SF.png
Names
IUPAC name
Nickel(II) carbonate
Other names
Nickelous carbonate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.020.063
EC Number
  • 222-068-2
RTECS number
  • QR6200000
UN number 3288
Properties
NiCO3
Molar mass 118.7
Appearance light green powder
Density 4.39 g/cm3
Melting point 205 °C (401 °F; 478 K)
decomposes[1]
0.0093 g/100ml
6.6·10−9
Structure
rhombohedral
Hazards
Safety data sheet ICSC 0927
GHS pictograms GHS07: HarmfulGHS08: Health hazard[2]
GHS signal word Danger
H302, H312, H332, H315, H317, H319, H334, H335, H350[2]
P201, P261, P280, P305+351+338, P308+313[2]
NFPA 704
Flammability code 0: Will not burn. E.g. waterHealth code 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g. chloroformReactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no codeNFPA 704 four-colored diamond
0
2
0
Lethal dose or concentration (LD, LC):
840 mg/kg
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Structure and reactionsEdit

NiCO3 adopts a structure like calcite, consisting of nickel in an octahedral coordination geometry.[4]

Nickel carbonates are hydrolyzed upon contact with aqueous acids to give solutions containing the ion [Ni(H2O)6]2+, liberating water and carbon dioxide in the process. Calcining (heating to drive off CO2 and water) of these carbonates gives nickel oxide:

NiCO3 → NiO + CO2

The nature of the resulting oxide depends on the nature of the precursor. The oxide obtained from the basic carbonate is often most useful for catalysis.

Basic nickel carbonate can be made by treating solutions of nickel sulfate with sodium carbonate, shown here for the basic carbonate:

4 Ni2+ + CO32− + 6 OH + 4 H2O → Ni4CO3(OH)6(H2O)4

The hydrated carbonate has been prepared by electrolytic oxidation of nickel in the presence of carbon dioxide:[5]

Ni + O + CO2 + 6 H2O → NiCO3(H2O)4

UsesEdit

Nickel carbonates are used in some ceramic applications and as precursors to catalysts.

Natural occurrenceEdit

The natural nickel carbonate is known as gaspéite - a rare mineral. Basic Ni carbonates also have some natural representatives.[6]

SafetyEdit

It is moderately toxic and causes low irritation. Avoid prolonged contact.

ReferencesEdit

  1. ^ https://www.conncoll.edu/media/website-media/offices/ehs/envhealthdocs/Nickel_Carbonate.pdf
  2. ^ a b c Sigma-Aldrich Co., Nickel(II) carbonate hydroxide tetrahydrate. Retrieved on 2014-05-06.
  3. ^ Keith Lascelles, Lindsay G. Morgan, David Nicholls, Detmar Beyersmann, "Nickel Compounds" in Ullmann's Encyclopedia of Industrial Chemistry Wiley-VCH, Weinheim, 2005. doi:10.1002/14356007.a17_235.pub2
  4. ^ Pertlik, F. (1986). "Structures of hydrothermally synthesized cobalt(II) carbonate and nickel(II) carbonate". Acta Crystallographica Section C. 42: 4–5. doi:10.1107/S0108270186097524.
  5. ^ Handbook of Preparative Inorganic Chemistry, 2nd Ed. Edited by G. Brauer, Academic Press, 1963, NY. p. 1557.
  6. ^ https://www.mindat.org/min-1657.html


Carbonates
H2CO3 He
Li2CO3,
LiHCO3
BeCO3 B C (NH4)2CO3,
NH4HCO3
O F Ne
Na2CO3,
NaHCO3,
Na3H(CO3)2
MgCO3,
Mg(HCO3)2
Al2(CO3)3 Si P S Cl Ar
K2CO3,
KHCO3
CaCO3,
Ca(HCO3)2
Sc Ti V Cr MnCO3 FeCO3 CoCO3 NiCO3 CuCO3 ZnCO3 Ga Ge As Se Br Kr
Rb2CO3 SrCO3 Y Zr Nb Mo Tc Ru Rh Pd Ag2CO3 CdCO3 In Sn Sb Te I Xe
Cs2CO3,
CsHCO3
BaCO3   Hf Ta W Re Os Ir Pt Au Hg Tl2CO3 PbCO3 (BiO)2CO3 Po At Rn
Fr Ra   Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
La2(CO3)3 Ce2(CO3)3 Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu
Ac Th Pa UO2CO3 Np Pu Am Cm Bk Cf Es Fm Md No Lr