Abstract
Na2HgS2 and K2HgS2 were obtained as colourless, tabular crystals by reacting the alkali sulfides Na2S and K2S with red HgS at 970K. Both compounds are orthorhombic: Na2HgS2, oP40, s.g. Pbca with a=18.24(2)Ä, b=7.494(5)Ä, c=7.237(5)Ä, Z=8; K2HgS2, oP20, s.g.. Pbcm, a=10.698(6)Ä, b=7.958(8)Ä, c=7.272(9)Ä, Z=4. Their crystal structures were determined from four circle diffractometer data and refined anisotropically to conventional R-factors of 0.056 (Na2HgS2) and 0.062 (K2HgS2) for 945 and 485 reflections with Fo(2)>3sigma(Fo(2)), resp. The crystal structures represent new structure types. They are closely related with each other and can be derived from hcp-arrays of the chalcogen-atoms. Characteristic feature ist the formation of discrete, almost linear [S-Hg-S](2-)-dithiomercurate anions with average HgS-bond lengths of 2.31Ä.
| Translated title of the contribution | Na2HgS2 and K2HgS2, Two Thiomercurates with Discrete Anions |
|---|---|
| Original language | German (Austria) |
| Number of pages | 6 |
| Journal | Zeitschrift für Naturforschung B: A Journal of Chemical Sciences |
| Publication status | Published - Sept 1991 |
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- 104 Chemistry
- 104003 Inorganic chemistry
- 104008 Catalysis
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