For the other two candidates, fcc and hcp, Stixrude and Cohen found that both can exist at high pressure and both would be directional (anisotropic) in how they transmit sound.

• 至于fcc和hcp其它的二个候选情况,Stixrude和科恩发现两者都能在高压下存在和两者在如何传播声音方面都有方向性(各向同异性的)。