/usr/share/xcrysden/examples/CRYSTALxx_input_files/ZnS.r1 is in xcrysden-data 1.5.60-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 | Zinc Blende
CRYSTAL
0 0 0
216
5.42 2.96
2
16 0.0 .0 .0
30 .25 .25 .25
EXTPRT
STOP
|