Archerite
Frazer B C, Pepinsky R
Acta Crystallographica 6 (1953) 273-285
X-ray analysis of the ferroelectric transition in KH2PO4
Sample: at T = 126 K
Locality: synthetic
Note: low-temperature polymorph of archerite
_database_code_amcsd 0009154
10.48 10.48 6.90 90 90 90 F-4d2
atom    x    y    z occ Biso
K       0    0   .5      .47
P       0    0    0      .40
O    .118 .033 .132  .5  .48
OH   .118 .033 .132  .5  .48