(IUCr) Phosphonoacetic acid

Figure 4
Part of the crystal structure of (2), which shows the formation of a (001) sheet built from R₆⁶(38) rings. For the sake of clarity, H atoms bonded to C atoms are omitted. The atoms marked with an asterisk (*), hash (#), dollar sign ($), ampersand (&) or at sign (@) are at the symmetry positions (1 + x, y, z), ( $[{{5}\over{2}}]$ - x, $[{{1}\over{2}}]$ + y, $[{{1}\over{2}}]$ - z), ( $[{{7}\over{2}}]$ - x, $[{{1}\over{2}}]$ + y, $[{{1}\over{2}}]$ - z), (x, 1 + y, z) and (1 + x, 1 + y, z), respectively.