A new intermetallic in the Ca-Au phase field has been synthesised, using an
unusual high-pressure route, with the stoichiometry Ca3Au4. The structure
of the intermetallic was investigated using powder X-ray and powder neutron
diffraction techniques. Ca3Au4 adopts the Pu3Pd4 structure type, which cry
stallises in the rhombohedral space group R (3) over bar containing 42 atom
s in a hexagonal unit cell. (C) 1999 Elsevier Science S.A. All rights reser
ved.