Romarchite
Pannetier J, Denes G
Acta Crystallographica B36 (1980) 2763-2765
Tin(II) oxide: structure refinement and thermal expansion
_database_code_amcsd 0009724
3.8029 3.8029 4.8382 90 90 90 P4/nmm
atom  x y     z Biso
Sn   .5 0 .2383  .57
O     0 0     0  .99