Realgar Wyckoff R W G Crystal Structures 1 (1963) 85-237 Second edition. Interscience Publishers, New York, New York _database_code_amcsd 0011671 9.27 13.50 6.56 90 106.62 90 P2_1/n atom x y z As1 .118 .024 -.241 As2 .425 -.140 -.142 As3 .318 -.127 .181 As4 .038 -.161 -.290 S1 .346 .008 -.295 S2 .213 .024 .120 S3 .245 -.225 -.363 S4 .115 -.215 .048