Marshite
Hull S, Keen D A
Physical Review B50 (1994) 5868-5885
High-pressure polymorphism of the copper(I) halides:
A neutron-diffraction study to ~10 GPa
Note: P = 1.74 GPa
Note: known as CuI-IV
_database_code_amcsd 0015181
4.155 4.155 20.48 90 90 120 R-3m
atom x y     z Biso
Cu   0 0 .1293  3.5
I1   0 0     0  1.5
I2   0 0    .5  1.5