Phase equilibria in the Li–B–C ternary system have been investigated by X-ray powder diffraction, scanning electron microscopy, electron probe microanalysis and differential scanning calorimetry. The isothermal section of the phase diagram has been constructed over the whole concentration range at 400 °C. The Li–B–C system is characterized by the formation of six ternary compounds: τ₁ – LiBC₃, τ₂ – LiB₂C₂, τ₃ – LiBC, τ₄ – Li₂B₂C, τ₅ – LiB₆C and τ₆ – LiB₁₃C₂. The formation of the new ternary compound LiB₂C₂ (own structure type, space group P6₃/mmc, a = 2.5930(3) Å, c = 22.680(1) Å) and binary BC₃ (space group Pm2, a = 2.4588(4) Å, c = 6.770(2) Å) has been revealed. The crystal structures are discussed in the light of the underlying graphene and heterographene networks.

中文翻译：

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Li–B–C三元体系中的相平衡和晶体结构关系

通过X射线粉末衍射，扫描电子显微镜，电子探针显微分析和差示扫描量热法研究了Li–B–C三元系统中的相平衡。相图的等温截面已在400°C的整个浓度范围内构建。的lib-C系统的特征在于六个三元化合物形成：τ ₁ - LIBC ₃，τ ₂ -的LiB ₂ ç ₂，τ ₃ - LIBC，τ ₄ -李₂乙₂ C，τ ₅ -的LiB ₆ C和τ ₆ -的LiB ₁₃ ç ₂。新三元化合物LiB ₂ C ₂（自身结构类型，空间群P 6 ₃ / mmc，a = 2.5930（3）Å，c = 22.680（1）Å）的形成和二元BC ₃（空间群P m 2 ，a = 2.4588（4）Å，c = 6.770（2）Å）已被揭示。根据下面的石墨烯和异石墨烯网络讨论了晶体结构。