What is the crystal structure of NiO?

NiO adopts the NaCl structure, with octahedral Ni2+ and O2− sites. The conceptually simple structure is commonly known as the rock salt structure. Like many other binary metal oxides, NiO is often non-stoichiometric, meaning that the Ni:O.

Is NiO FCC?

fact, pure face-centered cubic (FCC) NiO phase could be well indexed (JCPDS, No. 04-0835). More in details, the XRD spectrum of the latter typically presents peaks appearing at 2= 37.

What is the lattice parameter of NiO?

Cohesive energy:	eV
Lattice parameter:	2.08 Å
Density:	6.67 g/cm3

What is the compound for NiO?

NiONickel(II) oxide / Formula

What is the charge for nickel?

+2 charge
The nickel provides the positive charge and therefore the nickel ion must have a +2 charge.

Is NiO soluble in water?

It is difficult to prepare this compound by simply heating nickel in oxygen and it is more conveniently obtained by heating nickel hydroxide, carbonate or nitrate. Nickel oxide is readily soluble in acids but insoluble in hot and cold water. Thermal decomposition of Ni(OH)2, NiCO3, or NiNO3 gives NiO.

What is the XRD pattern of NiO nanoparticles?

The XRD pattern shows that the samples are single phase and no any other impurities distinct diffraction peak except the characteristic peaks of FCC phase NiO was detected. This result shows that the physical phases of the NiO nanoparticles have higher purity prepared in this work.

What is the size range of NiO nanoparticles prepared by arc plasma?

(1) Cubic NiO nanoparticles with spherical shape higher purity, well dispersed, and narrow size distribution ranges from 15 to 65 nm were successfully prepared by anodic arc plasma method and different approaches such as XRD, TEM, SAED, FTIR, and BET were used to characterize.

What can FTIR spectra tell us about Nio nanoparticles?

Figure 5 shows the FTIR spectra of NiO nanoparticles, which showed several significant absorption peaks. The broad absorption band in the region of 600–700 cm −1 is assigned to Ni–O stretching vibration mode; the broadness of the absorption band indicates that the NiO powders are nanocrystals.

What is the size of a Nio crystallite?

The NiO crystallite size, dXRD, decreased during reduction from an initial value of 2.7 nm to final values below 0.9 nm, at which point the XRD lines were so broad that accurate estimates of size were not possible ( Fig. 9 ).