Downeyite
McCullough J
Journal of the American Chemical Society 59 (1937) 789-794
The Crystal Structure of Selenium Dioxide
_cod_database_code 1010994
_database_code_amcsd 0017909
8.353 8.353 5.051 90 90 90 P4_2/mbc
atom    x    y   z
Se1  .133 .207   0
O1   .358 .858 .25
O2   .425  .32   0