Layer and tunnel structures in new molybdenophosphates: Cs/sub 2/Mo/sub 4/P/sub 6/O/sub 26/ and M/sub 4/Mo/sub 8/P/sub 12/O/sub 52/ (M = Cs, Rb, K, Tl)

Journal Article · Sat Aug 01 00:00:00 EDT 1987 · J. Solid State Chem.; (United States)

DOI:https://doi.org/10.1016/0022-4596(87)90089-2· OSTI ID:6198478

Lii, K H; Haushalter, R C

Crystals of Cs/sub 2/Mo/sub 4/P/sub 6/O/sub 26/ and Cs/sub 4/Mo/sub 8/P/sub 12/O/sub 52/ were both discovered in the same reaction product obtained from heating a stoichiometric mixture of Cs/sub 2/MoO/sub 4/, MoO/sub 3/, MoO/sub 2/, and P/sub 2/O/sub 5/ in an evacuated quartz tube at 800/sup 0/C. For Cs/sub 2/Mo/sub 4/P/sub 6/O/sub 26/, monoclinic, P2/c, a = 7.479(3), b = 8.461(5), c = 9.018(2) A, ..beta.. = 101.99(3)/sup 0/, V = 558.2(7) A/sup 3/, Z = 1, and R = 0.045, R/sub w/ = 0.045, R/sub w/ = 0.053 for 936 independent reflections. For Cs/sub 4/Mo/sub 8/P/sub 12/O/sub 52/, monoclinic, P2/sub 1/, a = 6.398(1), b = 19.497(6), c = 9.835(2) A, ..beta.. = 107.06(3)/sup 0/, V = 1173(1) A/sup 3/, Z = 1, and R = 0.046, R/sub w/ = 0.046, R/sub w/ = 0.058 for 1398 independent reflections. Cs/sub 2/Mo/sub 4/P/sub 6/O/sub 26/ consists of layers of molybdenum phosphorus oxide with the cesium atoms between the layers. Each layer is built up from corner-sharing MoO/sub 6/ octahedra, PO/sub 4/ tetrahedra, and pyrophosphate groups, P/sub 2/O/sub 7/. Cs/sub 4/Mo/sub 8/P/sub 12/O/sub 52/ is composed of the same building units arranged in a different way to give rise to tunnels where the cesium cations reside. The rubidium, potassium, and thallium analogs of Cs/sub 4/Mo/sub 8/P/sub 1//sup 2/O/sub 52/ were also prepared. The Cs/sub 2/Mo/sub 4/P/sub 6/O/sub 26/ structure is closely related to that of K/sub 4/Mo/sub 8/P/sub 12/O/sub 52/.

• Research Organization: Exxon Research and Engineering Co., Annandale, NJ
• OSTI ID: 6198478
• Journal Information: J. Solid State Chem.; (United States), Vol. 69:2
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CESIUM COMPLEXES
CHEMICAL PREPARATION
CRYSTAL STRUCTURE
MOLYBDENUM OXIDES
PHOSPHORUS OXIDES
POTASSIUM COMPLEXES
RUBIDIUM COMPLEXES
THALLIUM COMPLEXES
CRYSTAL GROWTH
EXPERIMENTAL DATA
LATTICE PARAMETERS
MONOCLINIC LATTICES
SPACE GROUPS
ALKALI METAL COMPLEXES
CHALCOGENIDES
COMPLEXES
CRYSTAL LATTICES
DATA
INFORMATION
MOLYBDENUM COMPOUNDS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHOSPHORUS COMPOUNDS
REFRACTORY METAL COMPOUNDS
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
360202* - Ceramics
Cermets
& Refractories- Structure & Phase Studies
360201 - Ceramics
Cermets
& Refractories- Preparation & Fabrication