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 Na, T = 400 C _database_code_amcsd 0000913 9.979 18.036 5.270 90 106.71 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 .280399 .915874 .985783 .002212 .000596 .007001 .000089 .001141 -.000003 Si2 .287218 .829369 .486744 .002404 .000712 .006998 .000196 .001035 .000038 Mg1 0 .910867 .5 .003075 .000816 .008561 0 .001478 0 Mg2 0 .820556 0 .003052 .000843 .010557 0 .014390 0 Mg3 0 0 0 .003076 .000646 .008417 0 .001857 0 Na 0 .723943 .5 .007284 .001104 .014194 0 -.001655 0 Ca 0 .723943 .5 .007284 .001104 .014194 0 -.001655 0 K .471512 .988462 .539990 .017534 .003916 .048638 -.003753 -.014281 -.000011 O1 .113196 .915663 .895280 .002397 .000834 .008983 .000089 .000826 -.000254 O2 .119168 .832412 .392321 .002470 .001115 .009893 .000148 .001181 -.000453 F3 .102932 0 .390656 .004568 .001010 .013442 0 .001847 0 O4 .361387 .752077 .565024 .005110 .000961 .013364 .000892 .002072 .000533 O5 .347600 .870947 .260105 .003453 .001398 .011432 .000116 .001439 .001881 O6 .343863 .882143 .759688 .003826 .001390 .010031 -.000119 .002362 -.001602 O7 .341910 0 .048703 .003765 .000530 .022263 0 .001475 0