Hydrothermal synthesis, structural approach, magnetic and M?ssbauer study of the layered Fe(III) carboxyethylphosphonate [Fe(OH)(H2O)(O3P-(CH2)2-CO2H)] or MIL-37

X-ray powder diffraction data are reported for a series of multipyrazole compounds in this paper. This work shows that the unit cell dimensions determined by single crystal agree well with those of powder diffraction analysis.