NDLI: New data on the composition and crystal structure of galkhaite (Hg,Cu)$_{6}$(Cs,Tl)(As,Sb)$_{4}$S$

Content Provider	Springer Nature Link
Author	Vasil’ev, V. I. Pervukhina, N. V. Borisov, S. V. Magarill, S. A.
Copyright Year	2010
Abstract	The composition of galkhaite from the Gal-Khaya deposit (Yakutia, Russia) and Chauvay Mine (Kyrgyzstan) has been examined by electron microprobe. A significant Cs content (up to 6.64 wt %) has been established in the mineral from both deposits; earlier, it had been not detected by either chemical or spectral analyses. The empirical formulas of galkhaite are (Hg$_{4.89}$Cu$_{0.92}$Zn$_{0.07}$)$_{5.88}$(Cs$_{0.71}$Tl$_{0.17}$)$_{0.88}$(As$_{3.98}$Sb$_{0.17}$)$_{4.15}$ S$_{12.10}$ and (Hg$_{4.64}$Cu$_{0.98}$Zn$_{0.34}$)$_{5.96}$ (Cs$_{0.85}$Tl$_{0.04}$)$_{0.89}$(As$_{3.68}$Sb$_{0.42}$)$_{4.10}$S$_{12.05}$ at the Gal-Khaya deposit and Chauvay Mine, respectively. The crystal structure of galkhaite from the Chauvay Mine (cubic, I43m, a = 10.4144(1) Å, V = 1129.5(2) Å$^{3}$, Z = 2) for the composition [Hg$_{4.83}$(Cu,Zn)$_{0.98}$□](Cs$_{0.71}$Tl$_{0.14}$□) (As$_{3.44}$Sb$_{0.56}$)S$_{12}$ has been determined by direct methods and refined to R = 0.0203. The structure of galkhaite is a framework consisting of vertex-shared [(Hg,Cu)-S$_{4}$ 2.5068(3) Å] tetrahedrons of the same orientation as large cavities formed in the initial sphalerite structural type due to eight anion vacancies: two [S$_{4}$]-tetrahedrons at the point of origin and at the center of the I-cell and 12 cation vacancies as 2 cation octahedrons around the 000 and $$ {\raise0.5ex\hbox{$\scriptstyle 1$} -0.1em/-0.15em \lower0.25ex\hbox{$\scriptstyle 2$}}{\raise0.5ex\hbox{$\scriptstyle 1$} -0.1em/-0.15em \lower0.25ex\hbox{$\scriptstyle 2$}}{\raise0.5ex\hbox{$\scriptstyle 1$} -0.1em/-0.15em \lower0.25ex\hbox{$\scriptstyle 2$}} $$ sites.
Starting Page	662
Ending Page	668
Page Count	7
File Format	PDF
ISSN	10757015
Journal	Geology of Ore Deposits
Volume Number	52
Issue Number	7
e-ISSN	15556476
Language	English
Publisher	SP MAIK Nauka/Interperiodica
Publisher Date	2011-01-09
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Mineral Resources
Content Type	Text
Resource Type	Article
Subject	Geology Economic Geology Geochemistry and Petrology

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