Zharchikhite, AlF(OH)2: a novel structure type related to α -PbO2

The crystal structure of zharchikhite, AlF(OH)2, from the Zharchikhinskoe deposit (Buryatia, Russia) is solved here using single-crystal X-ray diffraction. The mineral is monoclinic, space group P21/c, a = 5.1788   (4), b = 7.8386   (4), c = 5.1624   (4)   Å , β = 116.276   (10) ° , V = 187.91   (3)   Å 3 and Z = 4. Zharchikhite demonstrates a novel structure type roughly related to the α -PbO2 structure type and different from other compounds of the Al – F – OH system. The crystal structure of zharchikhite is based on the octahedral pseudoframework built from zigzag chains of edge-sharing AlF2(OH)4 octahedra; adjacent chains are linked via F vertices and the pseudoframework contains wide channels.

Source: Acta Crystallographica Section B - January 9, 2024 Category: Chemistry Authors: Zubkova, N.V. Pekov, I.V. Ksenofontov, D.A. Pushcharovsky, D.Y. Tags: zharchikhite aluminofluoride aluminium hydroxyfluoride crystal structure α -PbO2 structure type Zharchikhinskoe deposit research papers Source Type: research