The Plasmakristall-3 Plus (PK-3 Plus) laboratory was a joint Russian-German laboratory for the investigation of dusty/complex plasmas on board the International Space Station (ISS), with the principal investigators at the German Max Planck Institute for Extraterrestrial Physics and the Russian Institute for High Energy Densities.[1] It was the successor to the PKE Nefedov experiment with improvements in hardware, diagnostics and software. The laboratory was launched in December 2005 and was operated for the first time in January 2006. It was used in 21 missions until it was deorbited in 2013.[2] It is succeeded by the PK-4 Laboratory.