The structure of NH₄H₂PO₄ is closely related to KH₂PO₄. A projection of the NH₄H₂PO₄ structure (comparable to KH₂PO₄ in Figure 8.20) is shown below. The lightly shaded phosphate tetrahedra are at z = ½, the darker ones at z = 0. The hydrogen atoms are represented by black spheres. Based on the pattern of O–H bondsin this figure, predict the displacements of the phosphorus atoms. Would you expect NH₄H₂PO₄ to be an SHG material like KDP?

Figure 8.20

Transcribed Image Text:

X z=0 z = Z=0 z =