Citation: Ishii, T.; Tsujino, N.; Arii, H.; Fujino, K.; Miyajima, N.; Kojitani, H.; Kunimoto, T.; Akaogi, M. (2017). A shallow origin of so-called ultrahigh-pressure chromitites, based on single-crystal X-ray structure analysis of the high-pressure Mg2Cr2O5 phase, with modified ludwigite-type structure. American Mineralogist, 102, pp. 2113-2118.