| 0.5Ca2+·C14H17N2O5−·0.5H2O | F(000) = 700 |
| Mr = 331.35 | Dx = 1.384 Mg m−3 |
| Monoclinic, P21/c | Synchrotron radiation, λ = 0.59038 Å |
| a = 14.996 (3) Å | Cell parameters from 4716 reflections |
| b = 5.5740 (11) Å | θ = 0.7–30° |
| c = 20.607 (4) Å | µ = 0.14 mm−1 |
| β = 112.55 (3)° | T = 100 K |
| V = 1590.8 (6) Å3 | Brick, colourless |
| Z = 4 | 0.18 × 0.06 × 0.03 mm |