Stichtite
Mills S J, Whitfield P S, Wilson S A, Woodhouse J N, Dipple G M,
Raudsepp M, Francis C A
American Mineralogist 96 (2011) 179-187
The crystal structure of stichtite, re-examination of barbertonite, and the
nature of polytypism in MgCr hydrotalcites
Note: Sample 84588, 2H1 polytype of stichtite = barbertonite
Locality: Barberton, South Africa
_database_code_amcsd 0018331
3.09689 3.09689 15.6193 90 90 120 P6_3/mmc
atom   x    y     z  occ Biso
Mg     0    0     0  .75   .8
Cr     0    0     0  .25   .8
O1   1/3  2/3 .0650       .64
H1   1/3  2/3  .131       .64
Wat2 .23 -.23   .25 .204  .64
CO3  1/3  2/3   .25 .124  .64
O3   .23 -.23   .25 .124  .64