Novel KTP-like complex phosphates KM {sup II} {sub 0.33}Nb{sub 0.67}PO{sub 5} (M {sup II}-Mn, Co)

Journal Article · Sun Jul 15 04:00:00 EDT 2007 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2007.04.023· OSTI ID:21015864

Zatovsky, I V ^[1]; Baumer, V N ^[2]; Slobodyanik, N S ^[1]; Nagorny, P G ^[1]; Shishkin, O V ^[2]

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1. Inorganic Chemistry Department, Kiev University, Volodimirska Street 64, Kiev 01033 (Ukraine)
2. STC 'Institute for Single Crystals' NAS of Ukraine, 60 Lenin ave., Kharkiv 61001 (Ukraine)

Single crystals of KTP-related phosphates of general formula KM {sup II} {sub 0.33}Nb{sub 0.67}PO{sub 5} (M {sup II}-Co, Mn) have been obtained in the pseudo-binary system K{sub 2}Mo{sub 2}O{sub 7}-KM {sup II} {sub 0.33}Nb{sub 0.67}PO{sub 5} by means of the flux technique. The compounds have been studied by single crystal and powder X-ray diffraction, FTIR and UV-VIS spectroscopy. Both complex phosphates belong to the tetragonal system and crystallize in the enantiomorphous polar space groups P4{sub 1} and P4{sub 3}. The structure contains cis-like helical chains which are connected by corner sharing Nb(M {sup II})O{sub 6} octahedra and further linked through the PO{sub 4} tetrahedra. The potassium cations are located in the channels running along [001] direction of the anionic framework [M {sup II} {sub 0.33}Nb{sub 0.67}PO{sub 5}]{sup -} and are irregularly coordinated by eight oxygen atoms. Potassium atom site is split into two equally occupied positions with q=0.5. - Graphical abstract: Chain-structure fragment of KM {sup II} {sub 0.33}Nb{sub 0.67}PO{sub 5} (M {sup II}-Mn, Co) viewed along the [100] direction. K atoms are located in the cavities of anionic framework.

• OSTI ID: 21015864
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 7 Vol. 180; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
COBALT COMPOUNDS
CRYSTAL GROWTH
ENANTIOMORPHS
FOURIER TRANSFORMATION
INFRARED SPECTRA
MANGANESE COMPOUNDS
MONOCRYSTALS
NIOBIUM COMPOUNDS
PHOSPHATES
POTASSIUM COMPOUNDS
SPACE GROUPS
SPECTROSCOPY
TETRAGONAL LATTICES
X-RAY DIFFRACTION