Serandite
Williams E R, Weller M T
American Mineralogist 99 (2014) 1755-1760
A variable-temperature neutron diffraction study of serandite: A Mn-silicate
framework with a very strong, two-proton site, hydrogen bond
Note: T = 4 K
Locality: Mont St. Hilaire, Quebec, Canada
_database_code_amcsd 0020402
7.6844 6.8913 6.73493 90.4576 94.0805 102.7770 P-1
atom     x     y     z   occ  Uiso
Mn1  .8533 .5896 .1394       .0025
Mn2  .8511 .0863 .1310  .944 .0105
Ca2  .8511 .0863 .1310  .056 .0105
Na1  .5598 .2514 .3582       .0100
Si1  .2152 .4106 .3457       .0002
Si2  .2068 .9442 .3461       .0002
Si3  .4536 .7385 .1442       .0002
O1   .6657 .7956 .1089       .0045
O2   .3204 .7061 .9395       .0045
O3   .1784 .4970 .5555       .0045
O4   .1596 .8419 .5593       .0045
O5   .0628 .3942 .1667       .0045
O6   .0531 .8922 .1727       .0045
O7   .4082 .5344 .2757       .0045
O8   .3978 .9102 .2871       .0045
O9   .2582 .1886 .3926       .0045
H16  .1486  .635 .5544   .78 .0197
H17   .141  .712  .498   .22 .0197