Na(NaMg)Mg5Si8O22(OH)2
Iezzi G, Gatta G D, Kockelmann W, Della Ventura G, Rinaldi R, Schafer W, Piccinini M, Gaillard F
American Mineralogist 90 (2004) 695-700
Low-T neutron powder-diffraction and synchrotron-radiation IR study of synthetic
amphibole Na(NaMg)Mg5Si8O22(OH)2
Sample: T = 8 K
_database_code_amcsd 0003768
9.70169 17.89537 5.25744 90 102.597 90 P2_1/m
atom       x      y       z occ   Uiso
NaA   .26461    .25  .06038 .83 .00688
MgA   .26461    .25  .06038 .07 .00688
Mg1  -.24280 .33860  .48952     .00688
Mg2  -.25451 .43158  .97520     .00688
Mg3  -.25442    .25  .95277     .00688
Mg4  -.24565 .50741  .48160 .37 .00688
Na4  -.24565 .50741  .48160 .31 .00688
Mg4' -.27291 .52696  .50151 .16 .00688
Na4' -.27291 .52696  .50151 .13 .00688
Si1A  .03609 .33535  .25812     .00328
Si1B  .53071 .83565  .30186     .00328
Si2A  .03892 .42099  .76004     .00328
Si2B  .54552 .91791  .80965     .00328
O1A  -.13735 .33691  .19646     .00357
O1B   .36675 .83608  .22068     .00357
O2A  -.13335 .42242  .70321     .00357
O2B   .37525 .91974  .74919     .00357
O3A  -.15111    .25  .70244     .00357
O3B   .35997    .75  .71712     .00357
O4A   .11908 .49933  .80839     .00357
O4B   .63160 .99345  .77154     .00357
O5A   .09694 .36393  .01295     .00357
O5B   .60373 .88605  .10438     .00357
O6A   .09837 .38166  .52814     .00357
O6B   .59421 .85628  .61049     .00357
O7A   .08616    .25  .30292     .00357
O7B   .58935    .75  .26556     .00357
H1   -.04591    .25  .75809 .71 .00688
D1   -.04591    .25  .75809 .29 .00688
H2    .53612    .25  .21111 .66 .00688
D2    .53612    .25  .21111 .34 .00688