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 = 3.60 GPa
Note: known as CuI-IV
_database_code_amcsd 0015182
4.0826 4.0826 20.077 90 90 120 R-3m
atom x y     z Biso
Cu   0 0 .1282 2.27
I1   0 0     0 1.54
I2   0 0    .5 1.54