晶系,格子系以及表示惯用胞参数关系的不等号  

CRYSTAL SYSTEM,LATTICE SYSTEM AND“≠”IN RESTRICTION OF CONVENTIONAL CELL METRIC

作　　者：吴鸿业[1] 徐宝[1] WU Hongye;XU Bao(Department of Physics Science and Technology,Baotou Teachers College,Baotou,Inner Mongolia 014030)

机构地区：[1]包头师范学院物理科学与技术学院,内蒙古包头014030

出　　处：《物理与工程》2021年第1期76-81,共6页Physics and Engineering

基　　金：国家自然科学基金(61565013)资助。

摘　　要："晶系""格子系""晶族"这三个概念都被用于晶体分类。本文在厘清这三个概念之间的区别与联系之后,分述晶系和格子系划分中特征对称性与惯用胞参数之间的关系。又通过一个假想的例子和一个真实的例子,说明基于惯用胞参数划分晶系的缺点。最后指出,讲授"晶系"部分内容时最好指出,表示晶胞参数关系的不等号≠应该理解为"不必等于",而不是"不能等于"。The three concepts of"crystal system","lattice system"and"crystal family"are used to classify crystals.After specifying the differences and relations of such three concepts,this paper explains the relationship between the characteristic symmetry and restrictions on conventional-cell parameters,for crystal systems and lattice systems,respectively.Through a hypothetical example and a real example,the shortcomings of determining crystal systems according to conventional-cell metrics is revealed.Finally,it is pointed out that,when teaching"crystal system",the symbol≠that indicates the relationship between conventional cell parameters should be interpreted as"not necessarily equal to"instead of"must not be equal to".

关 键 词：晶系 格子系 晶族 空间群 

分 类 号：O73[理学—晶体学]