Formation of an iodine zig-zag chain c(2 × 4) reconstruction on the Ge(111) surface Mats Göthelid, Magnus Björkqvist, Ulf O. Karlsson and S. Anders Flodström Microsc. Microanal. Microstruct., 5 4-6 (1994) 277-282 DOI: 10.1051/mmm:0199400504-6027700