Citation: Hongu, H.; Yoshiasa, A.; Kitahara, G.; Miyano, Y.; Han, K.; Momma, K.; Miyawaki, R.; Tokuda, M.; Sugiyama, K. (2021). Crystal structure refinement and crystal chemistry of parasymplesite and vivianite. Journal of Mineralogical and Petrological Sciences, 116, pp. 183-192.