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Conductivity and Structural Investigations in Lacunary Pb6Ca2Li2(PO4)6 Apatite
Prismatic crystals of Pb6Li2Ca2(PO4)6 were obtained by solid-state reaction. They were characterized by IR spectroscopy and chemical analyses. The structure as determined by X-ray diffraction study on single crystal revealed that the compound is isostructural to the hexagonal phase Pb8Na2(PO4)6. Cry...
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| Published in: | Journal of solid state chemistry 2002-06, Vol.166 (1), p.237-244 |
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| container_end_page | 244 |
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| container_start_page | 237 |
| container_title | Journal of solid state chemistry |
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| creator | Naddari, Thouraya Savariault, Jean-Michel Feki, Hafed El Salles, Philippe Salah, Abdelhamid Ben |
| description | Prismatic crystals of Pb6Li2Ca2(PO4)6 were obtained by solid-state reaction. They were characterized by IR spectroscopy and chemical analyses. The structure as determined by X-ray diffraction study on single crystal revealed that the compound is isostructural to the hexagonal phase Pb8Na2(PO4)6. Crystal data for Pb6Li2Ca2(PO4)6: space group P63/m (No. 176), a=b=9.6790(15) Å, c=7.1130(7), Z=1, R=0.039. In the compound, lithium was found to preferentially occupy the site (I) and the structure is stabilized by interactions between electron lone pairs of lead (II) ions. Electrical conductivity measured in a wide range of temperature is governed by a hopping mechanism of Li ions in tunnels. |
| doi_str_mv | 10.1006/jssc.2002.9596 |
| format | article |
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They were characterized by IR spectroscopy and chemical analyses. The structure as determined by X-ray diffraction study on single crystal revealed that the compound is isostructural to the hexagonal phase Pb8Na2(PO4)6. Crystal data for Pb6Li2Ca2(PO4)6: space group P63/m (No. 176), a=b=9.6790(15) Å, c=7.1130(7), Z=1, R=0.039. In the compound, lithium was found to preferentially occupy the site (I) and the structure is stabilized by interactions between electron lone pairs of lead (II) ions. 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They were characterized by IR spectroscopy and chemical analyses. The structure as determined by X-ray diffraction study on single crystal revealed that the compound is isostructural to the hexagonal phase Pb8Na2(PO4)6. Crystal data for Pb6Li2Ca2(PO4)6: space group P63/m (No. 176), a=b=9.6790(15) Å, c=7.1130(7), Z=1, R=0.039. In the compound, lithium was found to preferentially occupy the site (I) and the structure is stabilized by interactions between electron lone pairs of lead (II) ions. 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They were characterized by IR spectroscopy and chemical analyses. The structure as determined by X-ray diffraction study on single crystal revealed that the compound is isostructural to the hexagonal phase Pb8Na2(PO4)6. Crystal data for Pb6Li2Ca2(PO4)6: space group P63/m (No. 176), a=b=9.6790(15) Å, c=7.1130(7), Z=1, R=0.039. In the compound, lithium was found to preferentially occupy the site (I) and the structure is stabilized by interactions between electron lone pairs of lead (II) ions. Electrical conductivity measured in a wide range of temperature is governed by a hopping mechanism of Li ions in tunnels.</abstract><cop>San Diego, CA</cop><pub>Elsevier Inc</pub><doi>10.1006/jssc.2002.9596</doi><tpages>8</tpages></addata></record> |
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| ispartof | Journal of solid state chemistry, 2002-06, Vol.166 (1), p.237-244 |
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| subjects | Chemistry Condensed matter: electronic structure, electrical, magnetic, and optical properties Condensed matter: structure, mechanical and thermal properties Conductivity phenomena in semiconductors and insulators electrical conductivity Electronic transport in condensed matter Exact sciences and technology Inorganic chemistry and origins of life Inorganic compounds IR spectroscopy lead apatite lithium Low-field transport and mobility piezoresistance Physics Preparations and properties Salts single crystals structure Structure of solids and liquids crystallography Structure of specific crystalline solids |
| title | Conductivity and Structural Investigations in Lacunary Pb6Ca2Li2(PO4)6 Apatite |
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