In 1991 J . V . Badding and others identified the compound by X-ray diffraction as having the approximate composition FeH 0.94 and double hexagonal close packed ( dhcp ) structure.
22.
Imagine a group of close packed people, if they start suddenly moving from side to side in a quick manner, the the spaces between the people will increase, I hope that makes sense.
23.
It can occur as a dull brown or dark grey solid in two different crystalline forms : face centred cubic with formula CrH ~ 2 or a close packed hexagonal solid with formula CrH ~ 1.
24.
Face-centered cubic ( fcc ) structures differ from hexagonal close packed ( hcp ) structures only in stacking order : both structures have close-packed atomic planes with sixfold symmetry the atoms form equilateral triangles.
25.
The " fcc " value is the highest theoretically possible value for any lattice, although there are other lattices which also achieve the same value, such as hexagonal close packed and one version of tetrahedral bcc.
26.
In zinc there are only 6 nearest neighbours at 266 pm in the same close packed plane with six other, next-nearest neighbours, equidistant, three in each of the close packed planes above and below at 291 pm.
27.
In zinc there are only 6 nearest neighbours at 266 pm in the same close packed plane with six other, next-nearest neighbours, equidistant, three in each of the close packed planes above and below at 291 pm.
28.
Both ?-Fe 2 O 3 have a similar cubic close packed array of oxide ions and this accounts for the ready interchangeability between the three compounds on oxidation and reduction as these reactions entail a relatively small change to the overall structure.
29.
The IVM scaffolding or skeletal framework was defined by cubic closest packed spheres ( CCP ), alternatively known as the FCC or face-centered cubic lattice, or as the octet truss in architecture ( on which Fuller held a patent ).
30.
Here . . the flocks . . stand close packed in pens; bunches of young ponies are tied up in one corner . . and near by are the sober cart-horses, their plaited manes and tails aprick with ornaments of straw.
