Wurtzite-4H Frondel C, Palache C Science 107 (1948) 602-602 Three new polymorphs of zinc sulfide _database_code_amcsd 0015413 3.814 3.814 12.46 90 90 120 P6_3mc atom x y z Zn1 0 0 0 Zn2 1/3 2/3 .25 S1 0 0 .1875 S2 1/3 2/3 .4375