Fluoro-richterite Cameron M, Sueno S, Papike J J, Prewitt C T American Mineralogist 68 (1983) 924-943 High temperature crystal chemistry of K and Na fluor-richterites Note: sample K, T = 24 C _database_code_amcsd 0000917 9.992 17.972 5.260 90 105.80 90 I2/m atom x y z B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) Si1 .277177 .915164 .976889 .001095 .000282 .004242 0.000112 0.000365 -.000031 Si2 .285783 .828490 .480458 .001027 .000368 .003157 0.000032 0.000163 0.000003 Mg1 0 .910661 .5 .001473 .000420 .003342 0 0.000826 0 Mg2 0 .820963 0 .001677 .000364 .006682 0 0.000378 0 Mg3 0 0 0 .001491 .000297 .005811 0 0.000376 0 Na 0 .722749 .5 .003126 .000442 .005277 0 -.000671 0 Ca 0 .722749 .5 .003126 .000442 .005277 0 -.000671 0 K .485063 0 .508330 .011784 .002096 .033346 0 -.013013 0 O1 .111233 .914972 .891862 .001153 .000407 .005131 0.000147 0.000661 -.000070 O2 .117991 .831357 .391820 .001306 .000561 .005132 -.000033 0.000801 -.000273 F3 .101463 0 .387457 .002033 .000527 .005912 0 -.000261 0 O4 .360995 .751464 .564110 .002198 .000592 .007003 0.000679 0.000676 -.000072 O5 .345376 .869705 .249609 .001928 .000694 .005886 -.000083 0.000857 0.000550 O6 .341760 .882593 .748649 .001509 .000690 .006636 -.000038 0.000815 -.000785 O7 .335861 0 .032844 .002422 .000239 .009342 0 -.000171 0