Carbonate hydrates of the heavy alkali metals:: Preparation and structure of Rb2CO3 • 1.5 H2O and Cs2CO3 • 3H2O

被引：0
作者：
Cirpus, V [1 ]
Wittrock, J [1 ]
Adam, A [1 ]
机构：
[1] Univ Cologne, Inst Anorgan Chem, D-50939 Cologne, Germany
来源：
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE | 2001年 / 627卷 / 03期
关键词：
alkali metal carbonate-hydrates; carbonates; crystal structure;
D O I：
10.1002/1521-3749(200103)627:3<533::AID-ZAAC533>3.0.CO;2-A
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Rb2CO3 . 1.5 H2O and Cs2CO3 . 3 H2O were prepared from aqueous solution and by means of the reaction of dialkylcarbonates with RbON and CsOH resp. in hydrous alcoholes. Based on four-circle diffractometer data, the crystal structures were determined (Rb2CO3 . 1.5 H2O: C2/c (no.15), Z = 8, a = 1237.7(2) pm, b = 1385.94(7) pm, c = 747.7(4) pm, beta = 120.133(8)degrees, V-EZ = 1109.3(6) . 10(6) pm(3); Cs2CO3 . 3 H2O: P2/c (no. 13), Z = 2, a = 654.5(2) pm, b = 679.06(6) pm, c = 886.4(2) pm, beta = 90.708(14)degrees, V-EZ = 393.9(2) 10(6) pm(3)). Rb2CO3 . 1.5 H2O is isostructural with K2CO3 . 1.5 H2O. In case of Cs2CO3 . 3 H2O no comparable structure is known. Both structures show (1)(infinity)[(CO32-)(H2O)]-chains, being connected via additional H2O forming columns (Rb2CO3 . 1.5 H2O) and layers (Cs2CO3 . 3 H2O), respectively.
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页码：533 / 538
页数：6
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