Structure cristalline de type alluaudite K_0.4Na_3.6Co(MoO₄)₃ Journal Articles

abstract

• A new triple molybdate, potassium sodium cobalt tris(molybdate), K0.4Na3.6Co(MoO4)3, was synthesized using solid-state reactions. The Co2+and one Na+cation are located at the same general site, each with occupancy 0.5. Another site (site symmetry 2) is occupied by Na+and K+cations, with occupancies of 0.597 (7) and 0.402 (6), respectively. The other two Na+cations and one of the two Mo atoms lie on special positions (site symmetries -1, 2 and 2, respectively). The structure is characterized byM2O10(M= Co/Na) dimers, which are linked by MoO4tetrahedra, forming infinite layers. The latter are connected firstly by insertion of one type of MoO4tetrahedra and secondly by sharing corners with the other type of MoO4tetrahedra. This results in an open three-dimensional framework with the cavities occupied by the Na+and K+cations. The structure is isotypic with Na3In2As3O12and Na3In2P3O12. A comparison is made with structures such as K2Co2(MoO4)3andβ-NaFe2(MoO4)3and their differences are discussed.

authors

• Brown, Ian David
• Nasri, Rawia
• Fakhar Bourguiba, Noura
• Zid, Mohamed Faouzi

status

• published 

publication date

• January 1, 2015

has subject area

• 03 Chemical Sciences (FoR)
• Inorganic & Nuclear Chemistry (Science Metrix)

published in

• Acta Crystallographica Section E  Journal

keywords

• alluaudite-type
• crystal structure
• triple molybdate

Digital Object Identifier (DOI)

• 10.1107/s2056989014025894

start page

• 4

end page

• 7

volume

• 71

issue

• 1