Die Kristallstruktur der isotypen Verbindungen KAg(NO3)2, NH4Ag(NO3)2 und RbAg(NO3)2 |
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| Authors: | Erich Zobetz |
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| Institution: | (1) Institut für Mineralogie und Kristallographie, Universität Wien, A-1010 Wien, Österreich |
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| Abstract: | KAg(NO3)2 crystallizes in space group P21/a-C
2h
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,a=13.953,b=4.955,c=8.220 Å,  =97.76°,Z=4. X-ray intensities were collected with a two-circle diffractometer. The structure was solved by means of direct methods andFourier syntheses and was refined by the least squares method toR=0.034 with 1346 observed reflexions.
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{Ag2(NO3)4}2–-chains run parallel toy and are linked by potassium ions. Ag shows a distorted tetrahedral coordination with four relatively close O. K is irregularily surrounded by ten O. The isotypic compounds NH4Ag(NO3)2 and RbAg(NO3)2 were refined toR=0.032 and 0.035, respectively. The coordination figures are compareable with those in KAg(NO3)2. |
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| Keywords: | Alkali silver nitrates Crystal chemistry |
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