Topaz
Wunder B, Rubie D C, Ross C R, Medenbach O, Seifert F, Schreyer W
American Mineralogist 78 (1993) 285-297
Synthesis, stability, and properties of Al2SiO4(OH)2: A fully hydrated
analogue of topaz
_database_code_amcsd 0001552
4.7238 8.9473 8.3900 90 90 90 Pbnm
atom      x      y     z U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
Al   -.0948  .1322 .0798  .0098  .0089  .0137  .0002  .0002  .0000
Si    .4019 -.0595   .25  .0090  .0088  .0145  .0000      0      0
O1   -.2897  .0261   .25  .0088  .0095  .0150 -.0006      0      0
O2    .0554  .2558   .25  .0108  .0102  .0150 -.0003      0      0
O3    .2142 -.0069 .0940  .0101  .0100  .0136  .0010  .0006  .0000
OH   -.4103  .2508 .0665  .0106  .0122  .0167  .0021  .0001  .0016