| Abstract: | High Pressure Syntheses of Carbonates. V. Syntheses of Carbonates by Melt Reactions under High CO2 Pressure Binary compounds of transition metals react in melts of Tl2CO3 under CO2 pressure from 1 000 to 5 000 bar by giving ternary carbonates. By this the compounds Tl2Cu(CO3)2, TlCr(CO3)2, Tl3Cr(CO3)3, and Tl3V(CO2)3 could be prepared. The structure of Tl2Cu(CO3)2 contains Cu2 groups (a0 = 7.583 Å, b0 = 9.799 Å, c0 = 9.119 Å, β 111.51°, Z = 4, space group P21/c Nr. 14). The space group of TlCr(CO3)2 is also P21/c Nr. 14 (a0 = 19.917 Å, b0 = 8.605 Å, c0 = 19.138 Å, β = 104.79°, Z = 24). The compounds too were characterized by infrared spectroscopy. |
