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The crystal structure of arsenopalladinite, Pd~8~As~2.5~Sb~0.5~, and its relation to mertieite-II, Pd~8~Sb~2.5~As~0.5~ by Oxana V. Karimova; Andrey A. Zolotarev; Bo S. Johanson; Tatiyana L. Evstigneeva is a Earth and Planetary Sciences article available to read on EtoBox.

What is The crystal structure of arsenopalladinite, Pd~8~As~2.5~Sb~0.5~, and its relation to mertieite-II, Pd~8~Sb~2.5~As~0.5~ about?

## Abstract The crystal structure of arsenopalladinite, Pd~8~As~2.5~Sb~0.5~, from the Kaarreoja River, Inari commune, Finnish Lapland, Finland, was solved to R~1~ = 0.0451 on the basis of single-crystal X-ray diffraction data. The mineral is triclinic, space group P$\bar{1}$. The unit-cell parameters are: a = 7.3344(7), b = 7.3870(8), c = 7.5255(7) Å, α = 98.869(8), β = 102.566(8), γ = 119.096(11)°, V = 331.19(7) Å^3^ and Z = 2. The crystal structure of arsenopalladinite consists of an alternation of layers made by pnictogen (As, Sb) and layers made by palladium atoms stacked along the c axis. Arsenic and (As, Sb) nets exhibit a triangular topology (A and D nets), whereas palladium layers show triangular or pentagon–triangular nets (B and C nets). The unit-cell contains 6 layers, with the ABCDCBA stacking sequence. Although arsenopalladinite shows characteristics very similar (nets of the same topology) to the closely-related mineral mertieite-II, Pd~8~Sb~2.5~As~0.5~, it has a different stacking sequence.

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Author

Oxana V. Karimova; Andrey A. Zolotarev; Bo S. Johanson; Tatiyana L. Evstigneeva

Publisher

The Mineralogical Society; Mineralogical Society (ISSN 0026-461X)

Published

2020

Language

EN

Field

Earth and Planetary Sciences (Physical Sciences)