Davyne Hassan I, Grundy H D The Canadian Mineralogist 28 (1990) 341-349 Structure of davyne and implications for stacking faults Sample 1469 _database_code_amcsd 0005241 12.793 12.793 5.367 90 90 120 P6_3 atom x y z occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) O1 .2128 .4266 .7284 .0093 .0220 .0338 .0111 .0009 .0043 O2 .1045 .5588 .7479 .0157 .0083 .0224 .0080 .0002 -.0013 O3 .0004 .3300 .0203 .0224 .0183 .0147 .0139 .0124 .0081 O4 .3205 .3383 .0028 .0143 .0221 .0143 .0065 -.0027 .0081 SiT1 .3289 .4101 .75 .0039 .0054 .0049 .0029 .0001 .0013 AlT2 .0704 .4099 .7508 .0038 .0051 .0059 .0025 -.0005 .0000 Cl 2/3 1/3 .7322 .1314 .1314 .0172 .0657 0 0 Ca 2/3 1/3 .2287 .97 .0114 .0114 .0221 .0057 0 0 Na .1518 .3109 .2716 .51 .0507 .1600 .0355 .0826 -.0019 -.0083 K .1106 .2264 .2564 .43 .0243 .0470 .0633 .0232 -.0007 .0029 O51 -.0511 .0462 .1384 .23 .0707 O52 .0591 .1148 .3619 .25 .0448 S 0 0 .2708 .25 .0156 .0156 .0579 .0078 0 0 O5 0 0 .4964 .28 .0723