Normal to inverse transition in martian spinel: Understanding the interplay between chromium, vanadium, and iron valence state partitioning through a crystal-chemical lens

James J. Papike, Paul V. Burger, Aaron S. Bell, Charles K. Shearer, Loan Le and John Jones

American Mineralogist
doi: 10.2138/am-2015-5208
v. 100 no. 10 p. 2018-2025