Title: A Mixed-Valent Molybdenum Monophosphate with a Layer Structure: KMo3P2O14
Abstract: A new mixed-valent molybdenum monophosphate with a layer structure KMo3P2O14 has been isolated. It crystallizes in the space group P21/m with a = 8.599(2) Å, b = 6.392(2) Å, c = 10.602(1) Å, and β = 111.65(2)°. The layers [Mo3P2O14]∞ are parallel to (100) and consist of [MoPO8]∞ chains running along b→ , in which one MoO6 octahedron alternates with one PO4 tetrahedron. In fact, four [MoPO8]∞ chains share the corners of their polyhedra and the edges of their octahedra, forming [Mo4P4O24]∞ columns which are linked through MoO5 bipyramids along c→. The K+ ions interleaved between these layers are surrounded by eight oxygens, forming bicapped trigonal prisms KO8. Besides the unusual trigonal bipyramids MoO5, this structure is also characterized by a tendency to the localization of the electrons, since one octahedral site is occupied by Mo(V), whereas the other octahedral site and the trigonal bipyramid are occupied by Mo(VI). The similarity of this structure with pure octahedral layer structures suggests the possibility of generating various derivatives, and of ion exchange properties.
Publication Year: 1994
Publication Date: 1994-03-01
Language: en
Type: article
Indexed In: ['crossref']
Access and Citation
Cited By Count: 8
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot