Synthesis and Crystal Structure of SrC2

✍ Scribed by V. Vohn; M. Knapp; U. Ruschewitz

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 277 KB
• Volume: 151
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.2000.8630

✦ Synopsis

SrC 2 of high purity was prepared by the reaction of elemental strontium with graphite at temperatures of about 970 K. The known tetragonal room-temperature modi5cation (I4/mmm, Z ‫؍‬ 2) was con5rmed by synchrotron powder investigations, which revealed a strong anisotropic peak broadening. Temperature-dependent X-ray powder investigations resulted in a 5rst-order phase transition to a cubic high-temperature modi5cation (Fm3 m, Z ‫؍‬ 4) at about 700 K. Below room temperature a monoclinic modi5cation (C2/c, Z ‫؍‬ 4), which is isotypic to the crystal structure of ThC 2 at room temperature, was found.