Cordierite Armbruster T Physics and Chemistry of Minerals 12 (1985) 233-245 Ar, N2, CO2 in the structural cavities of cordierite, an optical and X-ray single-crystal study Sample: Ruby Island natural _database_code_amcsd 0007368 17.066 9.722 9.345 90 90 90 Cccm atom x y z occ U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) O11 .24747 -.10311 .35888 .0110 .0076 .0066 -.0009 .0024 -.0007 O16 .06232 -.41636 .34882 .0077 .0102 .0078 -.0008 -.0001 -.0029 O13 -.17343 -.31011 .35848 .0099 .0086 .0079 .0012 -.0016 -.0015 O26 .04317 -.24765 0 .0074 .0149 .0161 -.0022 0 0 O21 .12235 .18473 0 .0117 .0109 .0164 .0049 0 0 O23 .16477 -.07966 0 .0140 .0062 .0168 -.0026 0 0 AlT11 .25 .25 .25014 .0085 .0064 .0063 .0013 0 0 SiT16 0 .5 .25 .0060 .0070 .0056 0 0 0 SiT21 .19268 .07800 0 .0065 .0049 .0054 .0002 0 0 SiT23 -.13523 .23722 0 .0056 .0057 .0052 -.0006 0 0 AlT26 .05086 .30802 0 .0056 .0061 .0058 .0007 0 0 MgM .33737 0 .25 .0069 .0065 .0078 0 0 .0001 NaChO 0 0 .25 .05 .02 .03 .03 0 0 0 OCh1/4 0 0 .25 .3 .07 .060 .036 0 0 0 OCh1/4a .0617 0 .25 .2 .07 .13 .019 0 0 -.014