Threefold parallel interwoven (6,3) nets were assembled from Ni(II) cyclam complex and 1, 3,5-tris[2-(4-carboxyphenyl)-1-ethynyl]benzene. The network generates triangular voids of effective size ca. 18.4 x 14.7 x 9.5 Angstrom. It contains 35% free volume of the crystal volume and is stable up to 300 degreesC.