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), Journal Name: J. Solid State Chem.; (United States) Vol. 69:2; ISSN JSSCB
• Country of Publication: United States
• Language: English

Related Subjects

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