Donor-unsupported iso-butyllithium consists of hexamers with an ordered triclinic structure at −80 °C (α-phase). At ambient temperature, the compound exists as an orthorhombic, remarkably stable, plastic-crystalline γ-phase, which is built by disordered hexamers adopting a distorted face-centred cubic packing. Both structures were determined by X-ray powder diffraction. Additionally, an intermediate β-phase is observed.

中文翻译：

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X射线粉末衍射法分析异丁基锂的有序相和塑性结晶相的晶体结构† ‡

供体无载体的异丁基锂由六聚体组成，六聚体在-80°C（α相）下具有有序的三斜结构。在环境温度下，该化合物以正交晶态，非常稳定的塑性晶体γ相形式存在，该相是由无序六聚体采用扭曲的面心立方填料制成的。两种结构均通过X射线粉末衍射测定。另外，观察到中间的β相。