Beryl Brown G E, Mills B A American Mineralogist 71 (1986) 547-556 High-temperature structure and crystal chemistry of hydrous alkali-rich beryl from the Harding pegmatite, Taos County, New Mexico Sample: T = 500 deg C _database_code_amcsd 0001012 9.251 9.251 9.260 90 90 120 P6/mcc atom x y z occ B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) Be2 .5 0 .25 .86 .0018 .0198 .0035 .0099 0 0 Li2 .5 0 .25 .13 .0018 .0198 .0035 .0099 0 0 Al2 .5 0 .25 .01 .0018 .0198 .0035 .0099 0 0 Al 2/3 1/3 .25 .0041 .0041 .0031 .00205 0 0 Si1 .3892 .1194 0 .98 .0019 .0025 .0025 .0012 0 0 Al1 .3892 .1194 0 .02 .0019 .0025 .0025 .0012 0 0 O1 .3039 .2340 0 .0068 .0039 .0102 .0045 0 0 O2 .4966 .1456 .1436 .0056 .0068 .0043 .0048 -.0015 -.0004 WatC1 0 0 .25 .55 .0133 .0133 .0080 .00665 0 0 CsC1 0 0 .25 .09 .0133 .0133 .0080 .00665 0 0 KC1 0 0 .25 .05 .0133 .0133 .0080 .00665 0 0 NaC2 0 0 0 .21 .0083 .0083 .0034 .00415 0 0 CaC2 0 0 0 .02 .0083 .0083 .0034 .00415 0 0 MgC2 0 0 0 .02 .0083 .0083 .0034 .00415 0 0 FeC2 0 0 0 .01 .0083 .0083 .0034 .00415 0 0