Hello Mazlisya Mazelan , the ICDD card number for Sodium Alginate is 00--069-1523

Dear Mazlisya Mazelan thank you for asking this interesting technical question. Although a definite answer has already been provided by Thomas Degen it might also be interesting to read the following potentially useful article for further information on XRD characterization of sodium alginate:

Characterization and properties of sodium alginate from brown algae used as an ecofriendly superabsorbent

Article Characterization and properties of sodium alginate from brow...

Fortunately this is one of the research articles which have been posted by the authors as public full text on RG. So you can easily download it as pdf file.

Good luck with your research and best wishes, Frank Edelmann

Hello,

I found No. 069-1523 in ICDD

regards

Herbert