Spinel
Lenaz D, Youbi N, Min A D, Boumehdi M A, Abbou M B
American Mineralogist 99 (2014) 267-275
Low intra-crystalline closure temperatures of Cr-bearing spinels from the mantle xenoliths of
the Middle AtlasNeogene-Quaternary Volcanic Field (Morocco):Mineralogical evidence of a cooler
mantle beneath the West African Craton.
Note:Sample MAR-TF28
Locality:Middle Atlas Neogene-Quaternary Volcanic Field of Morocco
_database_code_amcsd 0020069
8.1499 8.1499 8.1499 90 90 90 *Fd3m
.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)
MgT    .125   .125   .125 .766 .0066  .0066  .0066  .0066       0       0       0
FeT    .125   .125   .125 .234 .0066  .0066  .0066  .0066       0       0       0
AlM      .5     .5     .5 .806 .0054  .0054  .0054  .0054 -.00038 -.00038 -.00038
CrM      .5     .5     .5 .194 .0054  .0054  .0054  .0054 -.00038 -.00038 -.00038
O    .26260 .26260 .26260      .0085  .0085  .0085  .0085 -.00044 -.00044 -.00044