The same team was also involved in the claimed discovery of technetium.  They reported the discovery of element 75 and element 43 in 1925 and named element 43 masurium (after Masuria in eastern Prussia, now in Poland, the region where Walter Noddacks family originated).  The group bombarded columbite with a beam of electrons and deduced element 43 was present by examining X-ray diffraction spectrograms. The wavelength of the X-rays produced is related to the atomic number by a formula derived by Henry Moseley in 1913.  The team claimed to detect a faint X-ray signal at a wavelength produced by element 43. Contemporary experimenters could not replicate the discovery, and it was dismissed as an error for many years. Some more recent attempts have been made to rehabilitate the Noddacks claims, but they are disproved by Paul Kurodas study on the amount of technetium that could have been present in the ores they studied: it could not have exceeded 3 × 10 μg/kg of ore, and thus would have been undetectable by the Noddacks methods. Discovery of element 43 was finally confirmed by a 1937 experiment in Sicily.