Synthese, Kristallstruktur und thermische Entwässerung von CsMnF4 · 2H2O

✍ Scribed by Erich Dubler; Lothar Linowsky; Jean-Pierre Matthieu; Hans-Rudolf Oswald

• Publisher: John Wiley and Sons
• Year: 1977
• Tongue: German
• Weight: 612 KB
• Volume: 60
• Category: Article
• ISSN: 0018-019X
• DOI: 10.1002/hlca.19770600515

✦ Synopsis

The preparation of a new fluoromanganate (111)-complex CsMnF, . 2H20 is reported. It crystallizes in the monoclinic space group C2 with a = 11.891 (2) A, b=6.589(1) A, c = 10.558(1) A, / I = 131.46(1)" and Z=4. The crystal structure has been solved from diffractometer data by heavy-atom methods and refined to a conventional R-value of 1.8% (including the contributions of three hydrogen atoms in measured and one in calculated positions). The structure is characterized by isolated, tetragonally distorted [MnF, (OH2)2]-~ctahedra with Mn-F-distances from 1.801 (8) A to 1.870(7) A and Mn-O-distances of 2.146 (6) A and 2.268 (6) A.

Cesium exhibits an irregular 10-coordination by 8 F-atoms and 2 O-atoms (mean values for the two independent cesium ions: Cs-F=3.17 A and 3.21 A,