Knasibfite Demartin F, Gramaccioli C M, Campostrini I, Orlandi P The Canadian Mineralogist 46 (2008) 447-453 Knasibfite, K3Na4[SiF6]3[BF4], a new hexafluorosilicate-tetrafluoroborate from La Fossa Crater, Vulcano, Aeolian Islands, Italy Locality: La Fossa Crater, Vulcano, Aeolian Islands, Italy _database_code_amcsd 0006186 5.522 17.106 9.175 90 90 90 Imm2 atom x y z Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) K1 1/2 .37387 .2826 .0353 .0399 .0283 .0376 0 0 .0088 K2 1/2 0 .4448 .0266 .0273 .0242 .0282 0 0 0 Na1 0 .1714 .3514 .0333 .0375 .0319 .0304 0 0 .0011 Na2 0 .3583 .6039 .0226 .0247 .0195 .0235 0 0 -.0036 Si1 0 0 .2030 .0187 .0172 .0147 .0242 0 0 0 Si2 1/2 .2142 .5193 .0192 .0192 .0182 .0201 0 0 -.0015 F1 0 0 .3864 .0334 .027 .050 .023 0 0 0 F2 0 0 .0242 .0393 .038 .057 .023 0 0 0 F3 .2144 .0697 .2094 .0368 .0312 .0285 .0507 .0153 -.0014 .0035 F4 1/2 .2254 .6987 .0473 .079 .044 .019 0 0 -.009 F5 1/2 .2038 .3369 .0328 .048 .028 .023 0 0 -.005 F6 .7156 .14567 .5318 .0350 .0299 .0298 .0455 .0131 .0043 .0063 F7 .2853 .28234 .5000 .0423 .0410 .0359 .050 .0183 .0111 .0064 F8 .2043 1/2 .2255 .0314 .027 .032 .035 0 .0042 0 F9 0 .4332 .3987 .0412 .053 .034 .036 0 0 .016 B 0 1/2 .3131 .0260 .030 .022 .025 0 0 0