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采用摩尔比为1∶1的NaOH-KOH混合熔融物对红柱石晶体各不同结晶学方向的自然晶面和切面进行了腐蚀实验,建立了红柱石晶体腐蚀坑形态在三维空间分布的立体模型。相同腐蚀条件下,红柱石晶体同种单形的晶面(切面)腐蚀坑形态相同,不同单形的晶面(切面)腐蚀坑形态不同,故根据腐蚀坑形态可进行晶体定向。腐蚀坑形态能体现了晶体的对称性。红柱石晶体各晶面(切面)的腐蚀坑形态在三维空间分布的立体模型和投影图可用来进行红柱石晶体的定向及缺陷研究。
The natural crystallographic plane and section of the andalusite in different crystallographic directions were studied by NaOH-KOH mixed melt with a molar ratio of 1: 1. The three-dimensional model was established for the distribution of andalusite morphology in three-dimensional space. Under the same etching conditions, the shapes of etched pits in the same single plane of the andalusite are the same, and the shapes of the corrosion pits in the crystal planes (cut planes) of the different single shapes are different. Therefore, the crystal orientation can be carried out according to the morphology of the corrosion pits. Corrosion pit morphology can reflect the symmetry of the crystal. Stereoscopic models and projection images of the morphology of the corrosion pits of the andalusite plane (slice) in three-dimensional space can be used to study the orientation and defects of andalusite.