Verbindungsbildung im System Ag₂S-GeS₂-AgI / Compound Formation in the System Ag₂S-GeS₂-AgI

Abstract

<jats:title>Abstract</jats:title><jats:p> Besides the well-known argyrodite (Ag<jats:sub>8</jats:sub>GeS<jats:sub>6</jats:sub>), the new compound Ag<jats:sub>2</jats:sub>GeS<jats:sub>3</jats:sub> could be synthesized from Ag<jats:sub>2</jats:sub>S-GeS<jats:sub>2</jats:sub> mixtures. Ag<jats:sub>2</jats:sub>GeS<jats:sub>3</jats:sub> crystallizes in an orthorhombic variant of the Wurtzite structure. Treatment of Ag<jats:sub>2</jats:sub>GeS<jats:sub>3</jats:sub> in a AgI/AgCl-eutectic yields the quaternary compound Ag<jats:sub>7</jats:sub>GeS<jats:sub>5</jats:sub>I. Crystal data for Ag<jats:sub>7</jats:sub>GeS<jats:sub>5</jats:sub>I and some analogous compounds are given.</jats:p>

Synthesis and X‐ray powder diffraction studies of semiconducting alloys in the system AgCd2‐xZnxGaS4

“…On the whole this leads to less distorion of coordination tetrahedra which is also indicated by the values of valence angles (Table 4). Still, interatomic distances Ag-S (0.2384(9)-0.246(2) nm) and Ga-S (0.2233-0.2434 nm) are in good agreement with those observed in other compounds with diamond-like structure: Ag 2 HgGeS 4 (Ag-S, 0.237-0.263 nm) [10], AgGaS 2 (Ag-S, 0.256 nm; Ga-S, 0.228 nm) [11], Ag 2 GeS 3 (Ag-S, 0.2373-0.2751 nm) [12], ZnGa 2 S 4 (Ga-S, 0.2280-0.2315 nm) [13], LiGaS 2 (Ga-S, 0.2254-0.2338 nm) [14].…”

The quasi-ternary system Ag2SCdSGeS2 and the crystal structure of Ag2CdGeS4

“…1 [11] heated in an oxygas burner flame to complete the bonding of the elementary sulfur. Then the containers were placed in charge-type furnace and heated without intermediate delays to the maximum temperature of 970-1420 K, depending on the alloy composition.…”

“…The crystallographic parameters of the binary and ternary compounds of the system [3][4][5][6][7][8][9][10][11] are summarized in Table 1.…”

“…The Cd 4 GeS 6 compound forms in the CdS GeS 2 system [13]; it melts incongruently at 1337 K and has a polymorphous transition at 1307 K. The LTmodification of Cd 4 GeS 6 crystallizes in a monoclinic structure [7] (Table 1). The Ag 2 S GeS 2 system and the crystal structure of compounds that form in it were repeatedly investigated [8][9][10][11][14][15][16][17][18][19][20]. We reviewed these papers in [21] the formation of three compounds, Ag 8 GeS 6 , Ag 10 Ge 3 S 11 and Ag 2 GeS 3 , was also confirmed.…”

PdGeS3—A Novel One-Dimensional Metathiogermanate

“…[14,15] Analogous copper and silver compounds crystallize in blende or wurtzite-type variants with tetrahedral metal coordination. [16,17] A common feature of all known metathiogermanates is the connection of the different (GeS 3 ) 2nÀ n chains by the metals. The sulfur atoms coordinating the metal never all originate from the same strand.…”