Vurroite Pinto D, Bonaccorsi E, Balic-Zunic T, Makovicky E American Mineralogist 93 (2008) 713-727 The crystal structure of vurroite, Pb20Sn2(Bi,As)22S54Cl6: OD-character, polytypism, twinning, and modular description Locality: Vulcano, Aeolian Islands, Italy _database_code_amcsd 0004570 8.371 45.502 27.273 90 98.83 90 C2/c atom x y z occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) PbM1 .3838 .12038 .50934 .0486 .045 .059 .0410 .006 .003 -.0032 PbM2 .8798 .11928 .50973 .0507 .049 .060 .0428 .013 .004 -.0049 PbM3 .3037 .07225 .36465 .0577 .045 .049 .077 -.0009 .006 -.0146 PbM4 .8105 .07164 .36639 .0552 .045 .049 .069 -.002 .003 -.013 PbM5 .3094 .16778 .36618 .0567 .050 .050 .072 -.001 .013 .0202 PbM6 .8079 .16868 .36905 .0581 .046 .050 .078 -.003 .008 .0238 PbM7 .7387 .99299 .74970 .80 .0607 .040 .097 .0457 -.014 .008 -.003 BiM7 .7387 .99299 .74970 .20 .0607 .040 .097 .0457 -.014 .008 -.003 PbM8 .7385 .22831 .25004 .60 .0437 .038 .0541 .0396 -.0054 .007 -.0007 BiM8 .7385 .22831 .25004 .40 .0437 .038 .0541 .0396 -.0054 .007 -.0007 PbM9 .9617 .09124 .66089 .0583 .049 .065 .060 -.006 .006 .0076 PbM10 .4553 .09208 .6680 .0845 .077 .076 .1140 -.002 .041 -.010 PbM11 .2326 .1776 .7445 .2 .0241 BiM11 .2396 .1635 .7444 .3 .0241 AsM11 .244 .1524 .7521 .5 .0241 SnM12 .0295 .12079 .2499 .36 .042 BiM12 .0295 .12079 .2499 .14 .042 SnM13 .5409 .12114 .2501 .36 .040 BiM13 .5409 .12114 .2501 .14 .040 BiM14 .5606 .25453 .37186 .0387 .036 .0406 .0411 -.006 .009 -.0070 AsM15 .4301 .25011 .6298 .037 .031 .028 .054 .007 .010 -.001 BiM16 .1190 .21064 .49487 .0594 .049 .088 .0438 -.005 .013 -.0017 AsM17 .6252 .20655 .4864 .0299 .031 .017 .047 .006 .023 .006 AsM18 .195 .1689 .6129 .81 .025 BiM18 .194 .1696 .6289 .19 .025 BiM19 .6726 .16939 .61481 .0632 .057 .079 .054 -.010 .006 -.0108 AsM20 .131 .0434 .5049 .62 .045 BiM20 .128 .0411 .4997 .38 .045 BiM21 .6265 .04028 .49896 .0437 .048 .0405 .0435 -.002 .010 -.0005 AsM22 .930 .0088 .6278 .78 .028 BiM22 .947 .009 .6114 .22 .028 BiM23 .4306 .00887 .62198 .0536 .052 .060 .0454 .003 -.003 .0066 S1 .172 .1181 .5939 .9643 .029 ClS1 .172 .1181 .5939 .0357 .029 S2 .664 .1147 .5847 .9643 .032 ClS2 .664 .1147 .5847 .0357 .032 S3 .096 .0854 .4484 .9643 .030 ClS3 .096 .0854 .4484 .0357 .030 S4 .600 .0885 .4509 .9643 .027 ClS4 .600 .0885 .4509 .0357 .027 S5 .105 .1603 .4476 .9643 .019 ClS5 .105 .1603 .4476 .0357 .019 S6 .609 .1603 .4556 .9643 .031 ClS6 .609 .1603 .4556 .0357 .031 S7 .456 .2929 .6726 .9643 .028 ClS7 .456 .2929 .6726 .0357 .028 S8 .542 .2059 .3204 .9643 .023 ClS8 .542 .2059 .3204 .0357 .023 S9 .040 .1209 .3418 .9643 .029 ClS9 .040 .1209 .3418 .0357 .029 S10 .535 .1213 .3419 .9643 .033 ClS10 .535 .1213 .3419 .0357 .033 S11 .044 .0338 .3236 .9643 .032 ClS11 .044 .0338 .3236 .0357 .032 S12 .460 .9647 .6828 .9643 .027 ClS12 .460 .9647 .6828 .0357 .027 S13 .763 .0817 .2498 .9643 .034 ClS13 .763 .0817 .2498 .0357 .034 S14 .760 .1602 .2492 .9643 .035 ClS14 .760 .1602 .2492 .0357 .035 S15 .369 .0606 .5512 .9643 .031 ClS15 .369 .0606 .5512 .0357 .031 S16 .935 .0615 .5523 .9643 .035 ClS16 .935 .0615 .5523 .0357 .035 S17 .621 .9818 .5659 .9643 .038 ClS17 .621 .9818 .5659 .0357 .038 S18 .808 .0180 .4326 .9643 .026 ClS18 .808 .0180 .4326 .0357 .026 S19 .756 .0350 .6684 .9643 .040 ClS19 .756 .0350 .6684 .0357 .040 S20 .160 .0345 .6696 .9643 .035 ClS20 .160 .0345 .6696 .0357 .035 S21 .263 .2285 .6726 .9643 .026 ClS21 .263 .2285 .6726 .0357 .026 S22 .660 .2280 .6722 .9643 .028 ClS22 .660 .2280 .6722 .0357 .028 S23 .392 .2273 .4410 .9643 .030 ClS23 .392 .2273 .4410 .0357 .030 S24 .798 .2259 .4406 .9643 .028 ClS24 .798 .2259 .4406 .0357 .028 S25 .358 .1844 .5599 .9643 .032 ClS25 .358 .1844 .5599 .0357 .032 S26 .952 .1856 .5605 .9643 .031 ClS26 .952 .1856 .5605 .0357 .031 S27 .926 .1563 .6817 .9643 .034 ClS27 .926 .1563 .6817 .0357 .034 S28 .508 .1526 .6830 .9643 .031 ClS28 .508 .1526 .6830 .0357 .031 Cl1 .5 .0372 .75 .032 Cl2 0 .2259 .75 .034 Cl3 .2420 .1024 .7423 .029