烧绿石超族矿物分类新方案及烧绿石超族矿物

A New Mineral Classification and of Pyrochlore Super-Group Characteristics of Pyrochlore Super-Group Minerals in China

烧绿石超族矿物是指通式为A2-mB2X6-wY1-n(m=0~1.7,w=0~0.7,n=0~1.0)的氧化物。IMA-CNMNC2010年批准了烧绿石超族矿物分类命名的新方案,该方案中将B类离子用于分类,而A、Y类离子用于命名,并对已发表的烧绿石类矿物进行了重新认定。目前已有16个烧绿石超族矿物种被IMA-CNMNC正式认可,另有15种被定义为可能的新矿物种,但尚待进一步研究,在充分描述后有望得到IMA的批准承认,所有不符合新命名规则的矿物名称都将废弃。我国的烧绿石超族矿物较为丰富,并有其特点,同一个矿区产出的不同颗粒其主要成分含量变化较大,部分含放射性元素的矿物有不同程度的非晶质化。对其进行的化学成分分析、X射线衍射分析及晶体结构和离子占位研究对该类矿物的分类命名有重要意义。

Pyrochlore super-group minerals refer to general formula of A2-mB2X6-wY1-n(m=0~1.7, w=0~0.7, n= 0~1). IMA-CNMNC recently reported the classification and nomenclature of pyrochlore supergroup(Atencio et al., 2010). In this paper a new scheme of nomenclature based on the ions at A, B and Y sites is presented. This classification is based on B ions and nomination is based on Y and A ions. Pyrochlore super-group minerals are more abundant in China than other countries with their own characteristics. The composition of different particles within the same mining area has big differences, with some of the minerals containing radioactive elements with amorphous. Chemical components, X-ray diffraction, crystal structure and ion occupation are important for mineral classification.