Synthesis and crystal structure of two new phosphates with Alluaudite type structure: (M, Mn)3Fe(PO4)3 (M= Ca, Cd)Ghaleb Alhakmi, Abderrazzak Assani, Mohamed Saadi and Lahcen El AmmariMATEC Web Conf., 149 (2018) 01084DOI: https://doi.org/10.1051/matecconf/201814901084