Ein neues Oxomanganat(II): KLiMnO₂

Abstract

Neu dargestellt wurde KLiMnO2 aus den binären Oxiden (640°C, 17d,Ni‐ bzw. Ag‐Bömbchen) in Form orangefarbener Einkristalle. Die Kristallstruktur (a = 11,085, b = 3,389, c = 8,357 Å, β = 120,67°, R. Gr. C2/m, Vierkreisdiffraktometer, MoKα, 458 I0 (hkl), R = 4,87%) entspricht der von KLiZnO2. Es liegt ein Oxid des neuen Formeltyps A[(TO)n] mit n = 2 vor, entsprechend K[7] Li[4] Mn[4] O2. Effektive Koordinationszahlen, ECoN, und der Madelunganteil der Gitterenergie, MAPLE, werden berechnet und diskutiert.

The Chain Manganates K29Mn17O34, Rb11Mn8O16, and Cs4Mn3O6: a New Family of Mixed‐valent One‐dimensional Transition Metallates

“…With the exception of CsMnO 2 , all members of the family AMnO 2 (A = Li, Na, K, Rb) are known and have been characterized, at least structurally [13][14][15][16][17][18]. For divalent manganese, in addition to the mixed alkali manganates(II) Li 5 Na 3 Mn 5 O 9 , LiKMnO 2 , LiRbMn 3 O 4 and NaKMnO 2 [19][20][21][22], Na 2 MnO 2 was reported recently [23]. Although the binary manganese (II, III) oxide Mn 3 O 4 , occurring naturally as the mineral Hausmannite, is known to be pretty stable, hardly any ternary manganese (II/III) mixed-valent compounds are known.…”