Gahnite Fregola R A, Skogby H, Bosi F, D'Ippolito V, Andreozzi G B, Halenius U American Mineralogist 99 (2014) 2187-2195 Optical absorption spectroscopy study of the causes for color variations in natural Fe-bearing gahnite: Insights from iron valency and site distribution data Note: Sample Ni8967d Locality: Jemaa, Kaduna, Nigeria _database_code_amcsd 0020408 8.0912 8.0912 8.0912 90 90 90 *Fd-3m .125 .125 .125 atom x y z occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) ZnT .125 .125 .125 .97 .00502 .00502 .00502 .00502 0 0 0 FeT .125 .125 .125 .03 .00502 .00502 .00502 .00502 0 0 0 AlM .5 .5 .5 .995 .00426 .00426 .00426 .00426 -.00034 -.00034 -.00034 FeM .5 .5 .5 .005 .00426 .00426 .00426 .00426 -.00034 -.00034 -.00034 O .26413 .26413 .26413 .00424 .00424 .00424 .00424 -.00026 -.00026 -.00026