Contribution à l'étude du système quaternaire argent-mercure-thallium-tellure: Étude de la coupe AgTlTeHgTe

Zipserite, a new bismuth chalcogenide Bi5(S,Se)4 from Nagybörzsöny in Hungary with a R$\bar{3}$m(00γ)00 modulated structure

“…Zipserite is a new phase in the Bi-S(-Se) system related to the tetradymite archetype (Cook et al, 2007) and it does not correspond to any valid or invalid unnamed mineral of Smith and Nickel (2007). Its discovery and comparison with previously known Bi chalcogenides confirm the fundamental role of studies devoted to natural mineral assemblages to reveal novel crystal structures so far not obtained in synthetic laboratory (e.g., Gardes et al, 1989;Lin et al, 1996;Kitakaze, 2016Kitakaze, , 2017Bindi et al, 2020) (Kraus and Nolze, 1996) on the basis of the structural model given in Tables 3 and 4. Only reflections with Icalc > 2 are listed.…”

“…8). BiSe stacking can be determined as [2*Bi2S3 + Bi2] (Gardes et al, 1989). In the system Bi-Te for x = 2/3 and (Bi2Te3)n for x = 0.7, the structures are disordered (Glazov et al, 1984;Yamana et al, 1979) as their formula cannot be decomposed into a series of basic structural units.…”

“…100•Icalc/Imax dcalc h k l 9 16.397 0 0 1 10 4.099 0 0 4 18 3.520 1 0 1 5 3.300 0 1 2 14 3.300 1 0 2 4 3.279 0 0 5 100 3.009 0 1 3 5 2.4257 1 0 5 37 2.1777 1 0 6 37 2.0810 1 1 0 4 1.9641 0 1 7 7 1.8556 1 1 4 6 1.8219 0 0 9 3 1.7914 0 2 1 3 1.7602 0 2 2 4 1.7571 1 1 5 20 1.7116 2 0 3 12 1.5045 0 2 6 3 1.4603 1 1 8 15 1.3708 1 1 9 2 1.3577 2 1 1 2 1.3439 2 1 2 17 1.3219 1 2 3 5 1.2777 0 1 12 1. [1] (Nakajima, 1963) [2] (Gardes et al, 1989) [3] (Yamana et al, 1979 [4] (Glazov, 1984) [5] (Semiletov and Pinsker, 1955). The basic structural units are presented in the insert.…”

“…Figure 8 Scheme with related synthetic compounds sorted by their x ratio. [1](Nakajima, 1963) [2](Gardes et al, 1989) [3](Yamana et al, 1979) [4](Glazov, 1984) [5](Semiletov and Pinsker, 1955). The basic structural units are presented in the insert.…”