The crystal structure of a binary malonate, K-2[VO(C3H2O4)(2)H2O]. 3H(2)O,
is determined from 3486 unique reflections to R = 0.0496; a = 21.331(8), b
= 13.793(7), c = 10.695(4) Angstrom, gamma = 69.16(3)degrees, Z = 8, space
group P2(1)/b, rho(calcd) = 1.885(3) g/cm(3). The crystal is composed of th
e [VO(C3H2O4)(2)H2O](2-) complex anions, potassium cations, and solvate wat
er molecules combined into a three-dimensional framework.