Gahnite
D'Ippolito V, Andreozzi G B, Bosi F, Halenius U, Mantovani L, Bersani D, Fregola R A
Mineralogical Magazine 77 (2013) 2941-2953
Crystallographic and spectroscopic characterization of a natural Zn-rich spinel
approaching the endmember gahnite (ZnAl2O4) composition
Locality: Jemaa, Kaduna State, Nigeria
_database_code_amcsd 0019968
8.0850 8.0850 8.0850 90 90 90 *Fd3m
.125 .125 .125
atom       x      y      z  occ U(1,1) U(2,2) U(3,3)  U(1,2)  U(1,3)  U(2,3)
AlM       .5     .5     .5 .980 .00415 .00415 .00415 -.00035 -.00035 -.00035
Fe2+M     .5     .5     .5 .015 .00415 .00415 .00415 -.00035 -.00035 -.00035
Fe3+M     .5     .5     .5 .005 .00415 .00415 .00415 -.00035 -.00035 -.00035
ZnT     .125   .125   .125  .94 .00487 .00487 .00487       0       0       0
Fe2+T   .125   .125   .125  .03 .00487 .00487 .00487       0       0       0
AlT     .125   .125   .125  .03 .00487 .00487 .00487       0       0       0
O     .26414 .26414 .26414      .00452 .00452 .00452 -.00026 -.00026 -.00026