American Mineralogist Crystal Structure Database

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Perhamite
Download hom/perhamite.pdf
Mills S, Mumme G, Grey I, Bordet P
 
Mineralogical Magazine 70 (2006) 201-209
The crystal structure of perhamite
Note: H positions unknown
Locality: Emmons mine, Greenwood, Maine
_database_code_amcsd 0014576
7.021 7.021 20.218 90 90 120 P-3m1
atom     x     y     z  occ  Uiso
Ca1      0     0     0   .7  .015
Sr       0     0     0   .3  .015
Ca2    1/3   2/3 .7446      .0193
P1     1/3   2/3 .9829      .0085
P2       0     0 .2470      .0088
Al1  .1657 .3314 .8693      .0082
Al2      0     0 .4071  .85 .0196
Si1      0     0 .4071  .15 .0196
Si2  .1573 .7508 .4991 .225  .020
O1   .4288 .2144 .0435       .011
O2     1/3   2/3 .0580       .012
O3   .1262 .2524 .1085       .009
O4   .9137 .4569 .1591       .010
O5   .2394 .1197 .2231       .011
O6       0     0 .3231       .021
O7    .269  .135 .4357   .5  .047
O8    .134  .268 .4339   .5  .060
O9      .5     0    .5 .234   .22
O10    1/3   2/3  .496  .08   .08
Wat1   1/3   2/3 .2366       .056
Wat2  .969 .4847 .3351   .5  .037
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