四、毒砂过去认为毒砂属斜方晶系 a_0=6.43(?),b_0=9.55(?),Co=5.69(?),Z=8,可能的空间群为Pmmm,Pmmn,Cmm2,Cmmm 和 CZZZ。后来的工作证明对称稍有畸变,呈单斜或三斜对称。M.J.伯格(Buerger,1936)和森本信男等(1961)对毒砂的结构作了测定,认为一般毒砂为三斜晶系,其空间群是 Ci-P(?)。晶胞参数,天然产出的为 a_0=5.744±0.002(?),b_0=5.675±0.001(?),Co=5.785 Arsenopyrite In the past, arsenopyrite was considered as orthorhombic a_0 = 6.43 (?), B_0 = 9.55 (?), Co = 5.69 (?), Z = 8 and the possible space groups were Pmmm, Pmmn, Cmm2 and Cmmm And CZZZ. Later work proved symmetrical slightly distorted, was a single oblique or triclinic symmetry. The structure of arsenopyrite was determined by M. Berger (1936) and Morimoto et al. (1961). The general structure of arsenopyrite is triclinic and its space group Ci-P (?). The unit cell parameters of natural products are a_0 = 5.744 ± 0.002 (?), B_0 = 5.675 ± 0.001 (?), Co = 5.785