The angle-preserving effect of stereographic plots is even more obvious in the figure at right, which subtends a full 180?of the orientation space of a face-centered or cubic close packed crystal e . g . like that of Gold or Aluminum.
32.
As for the crystal structure of Barium I haven't verified its structure but as I mentioned above-is there any reason why it would not be 12 coordinate close packed . . 83.100.138.7 22 : 51, 25 November 2006 ( UTC)
33.
Since then the phase diagram of this high-pressure iron-hydrogen compound has been intensively investigated up to 70 GPa . Three stable crystalline forms have been observed, denoted ? ( the original dhcp form ), ? ( hexagonal close packed, hpc ), and ? ( face centered cubic, fcc ).
34.
This was first realised in 1995, when it was pointed out that a hypothetical metallic state of thorium that had the [ Rn ] 6d 2 7s 2 configuration with the 5f orbitals above the Fermi level should be hexagonal close packed like the group 4 elements titanium, zirconium, and hafnium, and not face-centered cubic as it actually is.
