Research dispels misconception of superconductivity in niobium compound
(PHYSorg.com Physics)

For over 65 years, niobium boride (NbB) has been considered a classic example of a superconducting material. This assumption, recorded in manuals on the physics of condensed matter and articles in scientific journals, has now been contested in a study conducted by researchers at the University of São Paulo (USP) in Brazil and at San Diego State University in the United States.