Also more often the same species. In oxides, this is especially the case. So you can think of the anions as a close packed lattice (FCC or HCP) in the sense of balls with closest packing. and the cations in certain holes of the lattice. This is the same in NaCl where chloride is bigger than sodium. It's also important

No, in the gas phase sodium chloride exists as a monomer (the sodium chloride molecule) along with its dimer $\ce{Na2Cl2}$. The dimer has a roughly rectangular shape and is quite floppy with chlorines located diagonally across from each other. The dimer makes up about 27% of the mix. All of the bond lengths, etc. can be found in this thesis. Go ...

2016年9月15日 · The negative standard enthalpy of formation of sodium chloride (i.e. ‘the formation is exothermic’) is primarily due to the formation of a crystal lattice. This crystal lattice is a macroscopic arrangement of ions in a cubic fashion with each sodium ion surrounded by six chlorides and each chloride ion surrounded by six sodium ions.

2022年4月22日 · According to Sodium chloride and Potassium chloride: Sodium chloride (NaCl) crystallizes, among various other shapes, into octahedron and tetragonal pyramid shapes which are absent in potassium chloride (KCl). I am a quite confused about this because both KCl and NaCl have a crystal structure. What is the explanation?

2021年1月22日 · In solid sodium chloride, each ion is surrounded by six ions of the opposite charge as expected on electrostatic grounds. The surrounding ions are located at the vertices of a regular octahedron. In the language of close-packing, the larger chloride ions (167 pm in size) are arranged in a cubic array whereas the smaller sodium ions (116 pm ...

This is why we say it has a 6:6 coordination pattern, which is indicative of a sodium chloride type structure. Cesium chloride, on the other hand, is 8:8 and indicative of its structure type. We tend to say that these patterns are consistent with a certain crystal structure because all the pieces fit together consistently.

2022年1月6日 · I understand that sodium chloride when solid, is a lattice, so NaCl there is an empirical formula,(so, expresses that the ratio of Na to Cl is 1-1), and not a molecular formula expressing exact numbers of atoms. I was looking at this question which covers what sodium chloride is like in gas state. What is Sodium Chloride like in gas state?

2015年7月18日 · If you look at the figure posted in the answer by @andselisk, each sodium atom is surrounded by 6 chloride ions and vice versa, giving a 1:1 stoichiometry and the formula NaCl. However, NaCl molecule would imply covalent bonds between pairs of sodium and chloride atoms, which don't exist in the compound NaCl. $\endgroup$ –

2022年1月8日 · Sodium chloride in the gas forms $\ce{NaCl}$ monomer and $\ce{Na2Cl2}$ dimer. So, no lattice, and those formulae show the number of atoms in the ionic compound, so not just an empirical formula that shows a ratio. So in that sense those are like molecular formulae.

2017年7月5日 · Since we know in sodium chloride crystal sodium ions are surrounded by $6$ chloride ions and each chloride ions are again bonded to $6$ sodium ions. What I want to know is that on what basis empirical formula of sodium chloride was assigned to be NaCl? does that formula mean sodium ion should atleast bonded to one chloride ion?