(IUCr) Phosphonoacetic acid

Figure 2
Part of the crystal structure of (1), which shows the formation of a (010) sheet built from R₆⁶(30) rings. For the sake of clarity, H atoms bonded to C atoms are omitted. The atoms marked with an asterisk (*), dollar sign ($) or ampersand (&) are at the symmetry positions ( $[{{3}\over{2}}]$ - x, y, $[{{1}\over{2}}]$ + z), ( $[{{1}\over{2}}]$ + x, -y, z) and ( $[{{3}\over{2}}]$ - x, y, - $[{{1}\over{2}}]$ + z), respectively.