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首页> 外文期刊>Acta Crystallographica, Section B. Structural Science >Structure of a new high-pressure-high-temperature modification of antimony(III) oxide, γ-Sb _2O _3, from high-resolution synchrotron powder diffraction data
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Structure of a new high-pressure-high-temperature modification of antimony(III) oxide, γ-Sb _2O _3, from high-resolution synchrotron powder diffraction data

机译:基于高分辨率同步加速器粉末衍射数据的新型高温高压氧化锑(γ-Sb_2O _3)的结构

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摘要

A quenchable new high-pressure-high-temperature modification of antimony(III) oxide, γ-Sb _2O _3, has been obtained at hydrostatic pressures of 9-11 GPa and temperatures of 573-773 K. Its crystal structure has been determined from high-resolution synchrotron powder diffraction data. γ-Sb _2O _3 consists of three-dimensionally cross-linked infinite chains of SbO _3E units (E = lone pair) with the chains forming tetragonal rod-packing. The underlying topology of γ-Sb _2O _3 (3,3T8) is found very rarely in inorganic structures; it is realised only for the polyanion [Si _4O _4N _6] ~(10-) that occurs in the Ce _4(Si _4O _4N _6)O structure type. The structural relation to the two previously known polymorphs of Sb _2O _3 at ambient pressure, valentinite and senarmontite is discussed.
机译:在9-11 GPa的静水压力和573-773 K的温度下,获得了可淬火的新型氧化锑(III)高压-高温改性剂γ-Sb_2O _3。其晶体结构由高分辨率同步加速器粉末衍射数据。 γ-Sb_2O _3由SbO _3E单元(E =孤对)的三维交联无限链组成,这些链形成四方杆堆积。 γ-Sb_2O _3(3,3T8)的基本拓扑在无机结构中很少见;仅对于在Ce _4(Si _4O _4N _4N _6N)O结构类型中出现的聚阴离子[Si _4O _4N _6]〜(10-)实现。讨论了在环境压力下与Sb _2O _3的两个先前已知的多晶型物,白铁矿和硒酸钠的结构关系。

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