Sulphur Crichton W A, Vaughan G B M, Mezouar M Zeitschrift fur Kristallographie 216 (2001) 417-419 In situ structure solution of helical sulphur at 3 GPa and 400 deg C Locality: synthetic P = 3 GPa, T = 400 C _database_code_amcsd 0011091 7.0897 7.0897 4.30238 90 90 120 P3_221 atom x y z U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) S1 .7727 .3067 .6105 .061 .108 .0277 .054 -.0077 -.0177 S2 .8755 0 1/6 .074 .069 .033 .035 -.0032 -.006