RuSe2 Lutz H D, Muller B, Schmidt T, Stingl T Acta Crystallographica C46 (1990) 2003-2005 Structure refinement of pyrite-type ruthenium disulfide, RuS2, and ruthenium diselenide, RuSe2 _database_code_amcsd 0010196 5.9336 5.9336 5.9336 90 90 90 Pa3 atom x y z U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Ru 0 0 0 .00301 .00301 .00301 -.00004 -.00004 -.00004 Se .38065 .38065 .38065 .00364 .00364 .00364 .00016 .00016 .00016