A new polymorph of Lu(PO3)3
نویسندگان
چکیده
A new polymorph of lutetium polyphosphate, Lu(PO(3))(3), was found to be isotypic with the trigonal form of Yb(PO(3))(3). Two of the three Lu atoms occupy special positions (Wyckoff positions 3a and 3b, site symmetry ). The atomic arrangement consists of infinite helical polyphosphate chains running along the c axis, with a repeat period of 12 PO(4) tetra-hedra, joined with LuO(6) octa-hedra.
منابع مشابه
A monoclinic polymorph of KY(PO3)4
The title compound, potassium yttrium polyphosphate, KY(PO(3))(4), was synthesized using the flux method. The atomic arrangement consists of an infinite long-chain polyphosphate organization. Chains, with a period of four PO(4) tetra-hedra, run along the a-axis direction. Two other polymorphs of this phosphate are known, in space groups P21/n and C2/c.
متن کاملThe type IV polymorph of KEu(PO3)4
Single crystals of KEu(PO(3))(4), potassium europium(III) polyphosphate, were obtained by solid-state reactions. This monoclinic form is the second polymorph described for this composition and belongs to type IV of long-chain polyphosphates with general formula A(I)B(III)(PO(3))(4). It is isotypic with its KEr(PO(3))(4) and KDy(PO(3))(4) homologues. The crystal structure is built of infinite he...
متن کاملComparative Study of Patentability of Drug Polymorphism in Iran and the USA
Drug polymorphs are defined as a different arrangement of the same active compounds in crystalline form, which can potentially affect its therapeutic activity by changing the dissolution profile of drug upon administration. Discovery of new polymorphs therefore can provide added value for a previously marketed drug, due to the new advantages provided by the novel polymorph. Therefore, there is ...
متن کاملSynthesis and structural data of a Fe-base sodium metaphosphate compound, NaFe(PO3)3
This data article contains the synthesis and structure information of a new Fe-base sodium metaphosphate compound, which is related to the research article entitled 'Synthesis, structural, magnetic and sodium deinsertion/insertion properties of a sodium ferrous metaphosphate, NaFe(PO3)3' by Lin et al. [1]. The research article has reported a new Fe-base metaphosphate compound NaFe(PO3)3, which ...
متن کاملDevelopment of an Automatic Land Use Extraction System in Urban Areas using VHR Aerial Imagery and GIS Vector Data
Lack of detailed land use (LU) information and efficient data collection methods have made the modeling of urban systems difficult. This study aims to develop a novel hierarchical rule-based LU extraction framework using geographic vector and remotely sensed (RS) data, in order to extract detailed subzonal LU information, residential LU in this study. The LU extraction system is developed to ex...
متن کامل