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-TF8
Locality:Middle Atlas Neogene-Quaternary Volcanic Field of Morocco
_database_code_amcsd 0020067
8.1704 8.1704 8.1704 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 .70 .0069  .0069  .0069  .0069      0      0      0
FeT   .125  .125  .125 .30 .0069  .0069  .0069  .0069      0      0      0
AlM     .5    .5    .5 .71 .0048  .0048  .0048  .0048 -.0001 -.0001 -.0001
CrM     .5    .5    .5 .29 .0048  .0048  .0048  .0048 -.0001 -.0001 -.0001
O    .2629 .2629 .2629     .0074  .0074  .0074  .0074 -.0007 -.0007 -.0007