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三羟基氯化铜有三个常见的异构体,氯铜矿、斜氯铜矿和副氯铜矿。氯铜矿是敦煌壁画中常用的颜料,斜氯铜矿因为不如氯铜矿稳定而很少见。从取自敦煌石窟彩塑中的一个50μm大小的颜料样品中,经过实体显微镜下的预处理,利用微衍射分析发现斜氯铜矿被用作了壁画颜料。在敦煌壁画中斜氯铜矿的历史最早甚至可以追溯到唐代。
Trihydroxy chloride has three common isomers of copper chloride, copper chloride, copper chloride and copper chloride. Chloride copper is a commonly used pigment in Dunhuang frescoes, which is rare because it is not as stable as chlorite. From a 50μm-sized pigment sample taken from the Dunhuang Grottoes, it was found by micro-diffraction analysis that the clinochip was used as a mural pigment after undergoing a physical microscope pretreatment. In Dunhuang murals in the history of oblique copper and copper can even be traced back to the Tang Dynasty.