This is the collapsed tetragonal crystal structure of NaFe2As2, with arsenic (As) atoms in a 5-fold coordination, courtesy of Alexander Goncharov. Sodium (Na) is represented by the black balls, iron ...
This is the tetragonal crystal structure of NaFe2As2, courtesy of Alexander Goncharov. Sodium (Na) is represented by the black balls, iron (Fe) by the red balls, and arsenic (As) by the yellow balls.